Abstract:The spatial database of 1∶2 500 000 geologic map of the intrusions in North China (also referred to as the Database) was established based on the data obtained from 1∶250 000- and 1∶50 000-scale basic geological surveys and special studies of North China conducted in recent years, as well as the latest literatures from China and abroad. Focusing on the intrusions in North China (also referred to as the study area), a geologic map was prepared and a database was built to express the spatial-temporal framework, material composition and spatial belt division of the intrusions in North China. The map was prepared with the MapGIS 6.7 software. The intrusions in the map were denoted by means of ‘lithology + era’. The map, with a data size of about 218 MB, covers 1743 graphic primitives of intrusions, 1534 stratigraphic units and 404 pieces of isotopic age data. Meanwhile, corresponding attributes were assigned to the graphic primitives of the intrusions and the isotopic ages. The geological map highlights the division of magmatic rock belts in North China, with the data of different magmatic rock belts being collated in detail including spatial distribution, magma stages, rock association, geochemical characteristics, genesis and tectonic background. This Database fully reflects the new achievements obtained from geological survey and scientific research in recent years. Therefore, it will provide basic geological maps and data for future geological surveys, scientific research and production. In the meantime, to a certain extent, it can be used as a reference for resource exploration and economic and social development.

Abstract:The spatial database of the 1∶500 000 digital geological map of the southern Shanxi - western Henan Region was compiled based on the results of the 1∶250 000, 1∶200 000 and 1∶50 000 regional geological surveys of the Zhongtiaoshan area in the southern Shanxi Province and western Henan Province, among other research results in recent years, while having systematically investigated key geological problems. Guided by the theories of plate tectonics and geodynamics and using the MapGIS 6.5 platform, the current project has achieved high mapping accuracy and satisfactory quality, with a data size of approximately 476 MB. During the comprehensive mapping and research process, 118 pieces of isotopic chronological data and petro-geochemistry data of 409 samples have been obtained and thus the eras of key strata and magmatic rock have been updated. For the latest and most innovative achievement, a new scheme was proposed for the middle-upper Proterozoic stratigraphic subdivision and the tectonic division of the Qinling orogenic belt.

Abstract:The 1∶500 000 Geological Map Spatial Database of the Xiwuqi and Bainaimiao Areas in the Erlian-Dongwuqi Metallogenic Belt is developed as part of China Geological Survey’s project ‘Geological and Mineral Survey of the Xiwuqi and Bainaimiao Areas in the Erlian-Dongwuqi Metallogenic Belt’ during 2016 to 2018. The stratum of the Paleozoic, Mesozoic, Paleogene and Neogene are divided into different formations, while the intrusive rocks are expressed in the form of ‘lithology + era’ based on 777 LA-ICPMS and SHRIMP zircon U-Pb ages. The geological map spatial database is rich in geological information with a data size of 210 MB, including 4682 stratigraphic and 1938 intrusive rock surface entities, all of which are associated with their corresponding attributes. The following achievements have been made during the mapping process: the Paleozoic stratigraphic division has been revised considering biota and key tectonic boundaries, with newly established and re-defined important stratigraphic units and an improved Paleozoic stratigraphic framework; the temporal-spatial distribution and properties of Paleozoic intrusive rocks have been clarified, with the Early and Late Paleozoic two-stage magmatism being responses to corresponding subduction-accretion orogeny; newly identified ophiolitic mélanges, such as Early Paleozoic Sayin Aobao, Changtu and Late Paleozoic Erdaojing-Diyanmiao and Wulangou, have been expressed on the map, which shows the structure of the accretionary orogeny formed by the Early Paleozoic North and South bi-direction subduction. The final closure of the Paleo Asian ocean at the end of the Late Paleozoic was constrained and the tectonic units were re-divided. These achievements and data may shed light on scientific issues with diverging views regarding the Xing’an-Mongolian orogeny, such as the division of the Paleozoic tectonic units and late Paleozoic tectonic setting. As the latest and most complete 1∶500 000 geological map database in the middle part of the Xing’an-Mongolian orogeny so far, this spatial database reflects the latest achievements of geological surveys and research in this area.

Abstract:The middle section of the northern margin of the North China Craton (also referred to as the study area) is situated in the junction between the North China Craton and Bainaimiao arc. With the Chifeng-Bayan Obo fault as the boundary, its southern and northern parts fall within different geotectonic units and have different basement features. Permian magmatites are widely distributed across the northern margin of the North China Craton and are exposed on both sides of the fault zone. Their provenance consists of very complex components, constricting fuller understanding of the petrogenesis and tectonic background of the magmatites. The Chifeng-Bayan Obo fault is covered by two geological survey projects, one involves four map sheets including the Beiliutumiao map sheet, and the other covers two map sheets including the Wulanbulage map sheet. In this paper, the testing data of chronology, geochemistry, and zircon Hf isotopes of the Permian magmatites in all six map sheets from the two projects were integrated and analyzed based on the regional geological surveys on a scale of 1∶50 000 of the two projects. The aim is to provide detailed and accurate data for further research of the provenance and the tectonic-magmatic evolution process of Permian magmatites in the study area. Furthermore, Permian intrusions are also widely exposed in the study area, which mainly include granodiorites, (quartz) diorite, monzogranite, and a small number of syenite granites. Permian volcanics are mainly distributed to the south of the fault zone and consist of andesitic and dacitic volcanics as well as a small number of rhyolitic volcanics. As shown by zircon U-Pb dating, the Permian magmatites within the study area were mainly formed in mid-late Permian, and the magmatites on the northern and southern sides of the fault zone have distinctly different zircon Hf isotopic characteristics. In short, zircon Hf isotopes are rich on the southern side but depleted on the northern side. The datasets of chronology, geochemistry and zircon Hf isotopes of Permian magmatites in the study area (also referred to as the Dataset) include three.xls files (Zircon U-Pb dating data.xls, Zircon Hf isotope data.xls and Whole-rock geochemistry data.xls), which are comprised of data on the petrogeochemistry of 104 samples, zircon U-Pb dating of 16 samples and zircon Hf isotopes of 12 samples. Samples collected for the Dataset were mainly tested in the Experiment and Test Center of Tianjin Center, China Geological Survey, and thus the data obtained are credible.

Abstract:Under the project of ‘1∶5 000 Regional Geological and Mineral Survey of the Hazhu, Hazhudongshan, Hazhunanshan and Lishitan Map-sheet’ by China Geological Survey, this dataset was compiled though rock analysis and tests based on detailed geological field surveys. This paper presents the test data of Late Paleozoic granite samples in the Hazhu area in Beishan, Inner Mongolia. The rock types include tonalite, granodiorite, monzonitic granite and alkaline feldspar granite. Zircon chronological data show that the formative era of these kind of rocks are Carboniferous-Permian. The whole-rock macroelement and trace element data show that Carboniferous granitoids are of the metaluminous-weak peraluminous and medium-K calc-alkaline series. The distribution curve of rare earth elements displays right-leaning characteristics. Trace elements are rich in large-ion lithophile elements including Rb, Ba and K; and deficient in high field-strength elements including Nb, Ta and Ti; thus, indicating that magma was formed in a continental marginal arc environment related to the subduction belt. In contrast, Permian granitoids display high-silicon, alkali-rich, metaluminous and magnesium-deficient features, and constitute a medium-high-K calc-alkaline series. They are also rich in large-ion lithophile elements and deficient in high-field strength elements. However, graphic texture is developed within alkaline feldspar granite and crystal caves are developed on a large scale in granodiorite, indicating that the Permian rock mass is situated in an extensional environment. The combination of the two can provide a basis and fundamental data support for studying the subduction polarity and tectonic evolution of the Hongshishan-Baiheshan Ocean in the Beishan area. This dataset is presented in the form of Excel tables, including two. xls files (Geochemistry data_HZ. Xls and Zircon U-Pb dating data_HZ. xls), which record the 27 samples’ geochemical data and 11 samples’ zircon U-Pb dating results of the samples, respectively. The samples of this dataset were all tested at the Tianjin Center laboratory of China Geological Survey, with reliable data quality.

Abstract:The 1∶50 000 geologic map database of Yueyashan map sheet (K47E015010), Inner Mongolia (also referred to as the Database) was comprehensively mapped and prepared according to the technical standards Technical Requirements for Regional Geological Survey (Scale: 1∶50 000) and Spatial Database Establishment Code of Digital Geologic Maps. In this case, the latest mapping ideas of orogenic belts were followed, a digital geological survey system (DGSS) was adopted, and the 1∶10 000 large-scale mapping of ophiolitic melange belts were combined. Furthermore, the structural and lithologic boundaries in Yueyashan map sheet were continually verified by making full use of the results of 1:200 000-scale regional geological surveys and 1∶50 000-scale mineral surveys as well as the remote sensing images of multiple types such as Spot, ETM, and Aster. As a result, the geologic maps in the Database were finally prepared according to the structural framework of the map sheet, and serve as part of the first-batch exploratory results mapped under the guidance of orogeny theory in Beishan area. In this Dataset, the material composition and structural association characteristics of the Baiyunshan ophiolites were plotted in the maps in detail, the sedimentary formations of the middle Neoproterozoic, Sinian, Cambrian, Ordovician, and Devonian were reclassified, the intrusions in the map sheet were divided into four sequences (i.e., the middle Silurian sequence, early Devonian sequence, late Devonian sequence, and early Permian sequence), and a comparatively complete tectonic evolution sequence was also established. This Database consists of the data and files of Yueyashan map sheet, including the data of three informal mapping units, eight formal stratigraphic units, four stages of magmatic events, and four stages of tectonic deformation, with a size of 26.7 MB. In addition, three hundred fifty-eight samples for thin slice petrographic observation, eighty-four samples for whole-rock geochemistry analysis and fourteen samples for zircon U-Pb dating were collected, and two mineralized sites were discovered in this work, all of which were also integrated into the database. These data reflect the demonstrative results of a 1∶50 000-scale geological survey of an orogenic belt, and can be used as a reference for subsequent mapping of orogenic belts. In addition, tectonic and magmatic evolutionary history of the subduction process was highlighted in the data, which is of scientific research value for the early Paleozoic evolution of Beishan orogenic belt.

Abstract:According to the ‘Technical Requirement for Regional Geological Survey (1∶50 000)’ (DD 2019-01) and other uniform standards and requirements, and making full use of the data for 1∶200 000 regional geological and 1∶50 000 mineral survey, the 1∶50 000 Geological Map of Beiliutumiao Map-sheet (K49E011021), Inner Mongolia was compiled by adopting the Digital Geological Survey System (DGSS) in combination with Spot, ETM, Aster and other remote sensing images to continuously verify and modify tectonic and lithologic boundaries. As an achievement with important value of reference in the Wenduermiao-Bainaimiao area of Inner Mongolia, the map provides detailed information on the rock composition and tectonic association of the Bainaimiao island-arc belt. We re-divide sedimentary formation into different types, i.e., Silurian, Permian, Cretaceous, and classify intrusive rocks in the region into four phases, establishing a relatively complete tectonic evolutionary series. The map database includes three informal mapping units, 10 formal stratigraphic units, four periods of magmatic events and two tectonic deformations, as well as the whole rock analysis of 176 samples, and zircon U-Pb ages of 10 samples, with a data size of 28.9 MB. The map details the tectonic and magmatic evolution process of the Bainaimiao subduction belt formed in the southward subduction of the Wenduermiao tectonic belt in the north. Reflecting the latest results of the 1∶50 000 regional geological survey, the database holds important scientific value regarding the Paleozoic tectonic evolution of the Wenduermiao orogenic belt. It may also serve as an important reference for subsequent geological surveys in the region. As the first pilot map of China Geological Survey to apply comprehensive regional geological survey mapping, the present project represents the first time to realize whole-process field investigation in China’s regional geological surveys.

Abstract:The 1∶50 000 regional geological map (K47E010009) of the Qinghegou Map-Sheet in Inner Mongolia, as an excellent national regional geological survey map (2018), was compiled by making full use of previous regional geological survey results. Through remote sensing, geophysical and geochemical exploration, geological survey, surveyed geological cross section, large-scale mapping and other means, an in-depth investigation was conducted on the ophiolitic mélange belt, sedimentary strata, igneous rock and tectonic deformation characteristics in the region. The spatial distribution, material composition and metamorphic deformation characteristics of the ophiolitic mélange belt were identified and classified as a Carboniferous Supra-Subduction Zone (SSZ) ophiolite. A detailed analysis of igneous rocks in the area has led to the classification of three magmatic events, namely, in the Late Silurian-Devonian, Carboniferous-Early Permian and Middle Permian, and the establishment of a tectonic-magmatic evolution sequence. The strata in the area have a comprehensive stratigraphic column established and are divided into two stratigraphic subregions separated by the Baiheshan ophiolitic mélange belt with distinct differences in rock combination and sedimentary environment. The map database contains geochemical analysis data of 67 samples and zircon U-Pb dating data of 17 samples. It represents the comprehensive results of the regional geological survey of the Qinghegou Map-Sheet, which is composed of the main maps, along with the map appearance and map border, covering the attributes of sedimentary and igneous rocks, ophiolitic mélanges and other geobodies in the area. It fully reflects the structure of the orogenic belt and the geological evolution process in the area, providing basic data support for geological prospecting and in-depth investigations on orogenic belts in the Beishan area.

Abstract:The 1∶50 000 Geological Map of the Juligetai Map-sheet (K48E017019), Inner Mongolia was compiled according to the ‘Technical Requirements for Regional Geological Surveys (1∶50 000)’ (DD 2006-XX) and other uniform standards and requirements. It also makes full use of the data from the 1∶200 000 regional geological survey and 1∶50 000 mineral resource survey, and adopts various remote sensing imagery systems including Spot, ETM and Aster. It is an important mapping achievement guided by the orogenic belt theory. In the current project, a geological mapping method for complex tectonic areas was used to creatively express the structural features in multiple stages and their attitude features in geological maps. The map comprehensively reflects the spatial distribution of different intrusive bodies and magmatic sequence of intrusive rocks in the Wulatehou Banner in Langshan area, as well as the rhythm and deformation characteristics, sedimentary age and sedimentary environment of metamorphic sedimentary rocks of the Zhaertaishan Group. The wall-rocks of the Huogeqi Copper Deposit was further identified as carbonaceous-calcareous slates of the Agulugou Formation’s second member. The deposit is mostly located at the hinge zone of the schistose fold in the stratum. The map database includes 3 informal mapping units, 12 official mapping units, 3 periods of magmatic events and 3 tectonic deformations, in addition to 120 pieces of petrochemical analysis data and zircon U-Pb age data of 13 samples, with a data size of 106 MB. The database represents an exemplary result of the 1∶50 000 orogenic belt geological survey. It plays a leading role in orogenic belt mapping and is able to support subsequent basic geological research and prospecting by providing essential basic data.

Abstract:1∶50 000 geologic map of the Huangzhuang map-sheet (J50E004015), Tianjin was mapped by employing the Digital Geological Survey System (DGSS), and consequently a database was built by fully collecting and making use of existing geological data, as well as following industrial specifications. The database includes four datasets, i.e. a basic element, comprehensive element, object element and independent element, in total 23 different categories of data types, accumulating to a data size of 43.8 MB. Among them, there are 96 geological entities, 320 geological (boundaries) lines and 85 videos (photos), as well as nine samples of isotope dating, 10 boreholes and 13 sedimentary (volcanic) lithostratigraphic units. In the geologic map, the genetic type of the superficial deposit landform and its vertical geological structure, stratigraphic structure feature and lithofacies palaeogeographic evolution since the Late Pliocene, as well as the bedrock geological structure, and environmental engineering geological problems were all summarized; the methodology for the geological survey and innovative map presentation of the geologic map in the low coastal plain coverage area was explored simultaneously, which all play an exemplary role for regional geological survey in the coverage area. The database can provide detailed and basic geological data for geological environmental protection, natural resource management, in addition to hydrological, engineering and environmental geological surveying, thus supporting a sustainable development of an important national economic zone, major engineering construction, geological and ecological environmental protection, and urban planning.

Abstract:In accordance with the ‘Standard of Digital Geological Map Spatial Database’ (DD 2006-06), the 1∶50 000 Geological Map Spatial Database of Guye Map-sheet (J50E002018), Tangshan Map-sheet (J50E003017) and Fangezhuangmeikuang Map-sheet (J50E003018), Hebei Province was completed by fully collecting previous geological data, and conducting 1∶50 000 regional geological survey of Guye Map-sheet, Tangshan Map-sheet and Fangezhuangmeikuang Map-sheet in and around Tangshan City, with 1∶50 000 geological maps compiled. Data was collected by means of remote sensing interpretation, field digital mapping, Quaternary drilling, manual shallow drilling and shallow seismic profiles. The database includes four datasets, i.e. basic element, comprehensive element, object and independent element, of which the basic element dataset includes 651 pieces of geopolygons (Quaternary, sedimentary rocks, metamorphic rocks, intrusive rocks and other area entities), 1428 geological boundaries, 194 attitudes, 562 photos, 70 data for dating (zircon U-Pb, ¹⁴C and OSL dating), and five data pertaining to Quaternary drill holes; the comprehensive element dataset consists primarily of standard frame (internal map frame); the object dataset includes 57 data on sedimentary lithostratigraphic units (including the Quaternary), two data applied to intrusive lithochronological units, faults, dikes, water region and map-sheet basic information; the independent element dataset comprises primarily angular maps, with no attributes added. The database was constructed under a stringent quality control system throughout the entire process, which ensures the authenticity, reliability and accuracy of data, thus providing reliable geological support for sustainable economic development, urban planning, construction, ecological preservation and major engineering projects in corresponding regions.

Abstract:The 1∶50 000 Shaliu River Map-sheet of Hebei Province is one of the key map-sheets for geological surveys of Beijing-Tianjin-Hebei plain Region, and the Late Cenozoic in the mapping area was mainly surveyed, with Quaternary borehole database reflecting the core achievement of the geological survey. By taking advantage of borehole construction and test data, as well as combining the collected borehole data, Quaternary borehole database was thus built, which mainly includes one basic data layers for borehole, five borehole catalog databases, five borehole design databases and five borehole histograms. Data source, data processing method, data attribute structure and data quality control are summarized in this paper, so as to present the practice of Quaternary borehole databases on the basis of Digital Geological Survey System (DGSS). The database provides a 3D geologic model of Tangshan urban area with basic data, serving coordinated development of Beijing-Tianjin-Hebei Region, which could also be referenced by borehole data processing and database construction in the geological survey of the other plain areas.

Abstract:The 1∶50 000 geological map database of Yuanqu map-sheet (I49E005015), Shanxi Province was developed in accordance with the standards and requirements of geological surveys proposed by the China Geological Survey and the unified standards and requirements applicable to the geological industry, for which the achievements obtained from previous 1∶200 000 and 1∶250 000-scale regional geological surveys were fully utilized. Meanwhile, the Digital Geological Survey System (DGSS) was adopted for geological field mapping. A total of 54 samples for petrochemical analysis and seven samples for isotope dating were collected in the field. The following achievements were obtained by establishing the Database. The material composition of the metamorphic basement in Zhongtiao Mountain area and the tectonic framework of the area were ascertained by breaking up the Sushui complex in the area. The Paleoproterozoic boundary of Zhongtiao Mountain was redetermined and a new division scheme of the boundary was put forward. The volcanic structures, lithology and lithofacies, and volcanic strata of the Mesoproterozoic Xiong’er Group were mapped, and isotopic dating was conducted for the group. As a result, the age of Mesoproterozoic lower boundary of Zhongtiao Mountain was restricted. Furthermore, the characteristics of metamorphic rock formations were systematically summarized, and three stages of tectonic superimposition patterns of the Paleoproterozoic in Zhongtiao Mountain were proposed. All these will provide important guidance for the research on metallogenic rules and controlling structures of the Hu-Bi type copper deposits in the core Cu mining area in Zhongtiao Mountain.

Abstract:The Dongliumafang Map-sheet (K50E023002) is located in the Hengshan-Sanggan high-pressure granulite belt at the junction of Shanxi, Hebei and Inner Mongolia. The 1∶50 000 Geological Map Spatial Database of Dongliumafang Map-sheet was compiled in accordance with the Technical Requirement for Regional Geological Survey (1∶50 000) (DD 2019−01) newly issued by China Geological Survey and other relevant uniform standards and requirements, by using modern mapping technology for metamorphic rock area and digital mapping acquisition system. The map-sheet gave a detailed definition of the strata, magmatic rocks, metamorphism and tectonic structure in the Neoarchean-Cenozoic era in the area: four tectonic-lithostratigraphic units of the Neoarchean Sanggan Group and the Paleoproterozoic Jining Group, and 13 Mesoproterozoic-Cenozoic stratigraphic units have been established; the evolutionary series of Neoarchean-Paleoproterozoic and Mesoproterozoic-Mesozoic (metamorphic) intrusive rocks have been established; the structural deformation style of three periods of Early Precambrian, and the fracture structure in the Mesozoic-Cenozoic Indosinian, Yanshanian and Himalayan periods have been identified; two types of high-pressure basic granulites with different protolith properties have been identified, with metamorphic periods divided. The map-sheet uses special line segments and patterns to express the plastic rheological characteristics and structural deformation style of deep crustal rocks in the ancient orogenic belt, and has reconstructed the evolution process of Paleoproterozoic orogenic tectonics. The database adopts a MapGIS format and comprises 1∶50 000 geological map library, map appearance and corner maps, and contains nine data pieces of zircon U-Pb age, with a data volume of 53.8 MB. The 1∶50 000 Geological Map of Dongliumafang Map-sheet has innovated the mapping techniques for high-grade metamorphic areas as well as map expression methods, setting an example for mapping work on high-grade metamorphic rock areas.

Abstract:Wanjia—Lancun area in Shandong Province is located between Laiyang depression and Zhucheng depression in Jiaolai Basin. The spatial database of 1∶50 000 digital geological maps of Wanjia Town (J50E021024), Nancun Town (J51E021001), Gaomi City (J50E022024), and Lancun Town (J51E022001) map sheets, Shandong Province (also referred to as the Database) was established according to the unified standards and requirements of the ‘Guidelines for 1∶50 000-Scale Regional Geological Survey in Quaternary Coverage Area (Trial)’ and the ‘Guidelines for 1∶50 000-Scale Regional Geological Survey (Trial)’ by relying on the project titled ‘1∶50 000-Scale Regional Geological Survey of Wanjia Town, Nancun Town, Gaomi City, and Lancun Town Map Sheets, Shandong Province’ initiated by the China Geological Survey in 2016. During development of the Database, previous geological data were fully utilized, a digital mapping system was adopted for field geological mapping, and standard 1∶50 000 geological maps and work instructions were developed by means of indoor map preparation combined with field geological mapping. The aim of the Database is to complete the lithologic mapping of early Cretaceous strata, including Yangjiazhuang Formation and Ducun Formation of Laiyang Group, Bamudi Formation of Qingshan Group, and Xingezhuang Formation of Wangshi Group. A volcanic edifice was discovered for the first time in Xingezhuang Formation of Wangshi Group, and the zircon U-Pb ages of volcanic intercalations in Xingezhuang Formation were determined to be early Cretaceous. The paleogeographic characteristics of Cretaceous lithofacies of Lidangjia—Mashan dome was restored according to the previous drilling data of Well JC-1, Well JC-2 and Well JC-3. Furthermore, the sedimentary tectonic framework of Wanjia—Lancun area was established. The database contains four standard 1∶50 000 geological maps, with a data size of about 22.3 MB. LA-ICP-MS zircon U-Pb isotopic ages of three volcanic rocks, and three optically stimulated luminescence (OSL) datings and four ¹⁴C isotopic ages of Quaternary were obtained in Jiaolai Basin The maps were prepared under the CGCS2000 national geodetic coordinate system and Gauss-Kruger projection. The Database fully reflects the results of 1∶50 000-scale regional geological survey and will provide basic geological maps for research, environment and energy exploration in Wanjia—Lancun area, and therefore, is of great significance.

Abstract:The 1∶50 000 Geologic Map Database of Sanchuan Map-sheet (I49E013014), Henan Province (also referred to as the Database) was established using data obtained through practical measurement and digital mapping. The structural and lithologic mapping was conducted during field data acquisition, focusing on the presentation of special geological blocks and informal mapping units. The samples collected in the field included 66 samples for microscopic petrography identification, 180 samples for whole-rock petrochemical analysis, 19 samples for isotopic dating, and 21 samples for chemical analysis in total. In this study, the main achievements obtained in this map-sheet are as follows. The Taowan Group was found to have occurred during the Ordovician according to multiple taxonomic classifications and short age ranges found in its stratotype section. Alkaline volcanic intercalations were found in the Taowan Group, indicating that an extensional basin developed on the southern margin of the North China Plate in the Ordovician. The greenschists in the Sichakou Formation and Xiewan Formation of the Kuanping Group were determined to be intraplate volcanic rocks, indicating that the main part of the Kuanping Group was formed in an extensional basin. The dike swarms of Silurian alkali-feldspar granite porphyry were found in the southern part of the map-sheet by mapping, restricting the closure era of the Qinling Ocean to a time not later than the Silurian. The intrusions of the late Mesozoic were divided into five intrusive stages. The Luanchuan fault zone was determined to have undergone three stages of activities in the early Paleozoic, early Mesozoic, and late Mesozoic. Furthermore, Sinian glacial sediments were newly discovered in the map-sheet. The Database consists of data on feature classes, complex classes, and object classes, with a data size of about 63.5 MB. It fully reflects the geological and mineral achievements of the map-sheet, and will provide basic data for mineral exploration and exploitation and prevention and control of geological hazards in the map-sheet, research on the Qinling Orogenic Belt, and the popularization of geoscience.

Abstract:The 1∶50 000 geologic map of the Xiaoshui map sheet (I49E016015), Henan Province was prepared by using the digital mapping technology and database building, during which existing geologic and mineral data were fully collected and comprehensively analyzed. The database of this geologic map (also referred to as the Database) is in the format of MapGIS and covers nine stratigraphic units and six stages of magmatic events, which also includes electronic probe data of 70 samples, chemistry testing data of 57 samples, zircon U-Pb dating of 73 samples and whole-rock geochemical data of 147 samples, coming to a total data size of 31.9 MB. Meanwhile, the new mapping theory and methodology based on orogenic belts were adopted to highlight tectonic and lithologic mapping as well as the presentation of special geologic bodies and informal mapping units. In this way, the contents on the map face were expressed in a more scientific, readable and practical manner. In this study, the structure of the North Qinling Orogenic Belt (NQOB) was established, consisting of the Shangnan-Danfeng tectonic belt, Zhu-Xia ophiolitic mélange belt, Qinling microcontinent and Erlangping island arc, a back-arc basin. Following this, it was clear that the Zhu-Xia ophiolitic mélange belt was formed in the early Paleozoic era. Furthermore, the composition and four stages of fold deformations of the Qinling Group were ascertained; the spatial distribution law, protolith and metamorphic era of the high and ultrahigh-pressure rocks in the map sheet area were determined. Thus, revealing that the whole Qinling microcontinent was involved in the early Paleozoic orogen and had undergone great transformation. The achievements of this study have provided new basic geological data for the preparation of the ‘Annals of Geology of Henan Province’ and the projects funded by the ‘Geological Exploration Fund of Henan Province’. Moreover, the 1∶50 000 geologic map of the Xiaoshui map sheet was awarded the ‘Excellent Map Sheet Prize’, among the areas mapped, based on orogenic belts in the national regional geological surveys of China in 2018.

Abstract:The 1∶50 000 geologic map database of the Shimen map sheet (I49E017018), Henan Province (also referred to as the Database) was developed in accordance with the ‘Technical Requirements for Regional Geological Survey (Scale: 1∶50 000)’ and other unified standards and requirements in the geologic industry, of which previous 1∶200 000-, 1∶250 000- and 1∶50 000-scale regional geological survey results were fully collected and utilized. In addition, the digital mapping system (DGSS) was adopted for geological field mapping and database building, and indoor map preparation was conducted along with field mapping. This Database was mainly built to summarize the eras and types of intrusions in the map sheet, as well as further incorporating the previously determined Shimen and Wuduoshan intrusives into the four stages of magmatic activities, specifically the Late Ordovician, Early Silurian, Mid-Late Silurian and the end of the Silurian period. As a result, the magma evolution sequence was built. Furthermore, based on the formation eras of the intrusions and the contact relationships between the intrusions and strata, the eras of the Damiao Formation and Huoshenmiao Formation of the Early Paleozoic Erlangping Group were re-determined to be of the Cambrian - Ordovician. The Database covers five stratigraphic units and four stages of magmatites, as well as rock geochemistry analytical data of 66 samples and dating data of 19 samples, with a data size of about 10.4 MB. The Database fully reflects the latest results of the 1∶50 000-scale regional geological surveys, providing references and guidance for future mineral and geological surveys, geologic hazard prevention & control and ecological environmental protection in the Shimen map sheet area.

Abstract:Junggar Basin in Xinjiang is an important home to reservoirs of energy and mineral resources such as oil, gas, and coal in China. In this paper, a dataset of 20 boreholes drilled in the coalfield of Wucaiwan area that lies in the eastern margin of Junggar Basin (also referred to as the Dataset) was established based on secondary development and exploitation of existing borehole materials. In other words, the Dataset was established by extracting important information from existing materials of the boreholes such as coordinates and elevation of boreholes, thickness and color of strata discovered, and data from interpretation of logging curves. It consists of Excel database files of 20 boreholes. Each database file is comprised of 10 worksheets, namely Basic information of boreholes, Lithological beds based on logging interpretation, Beds based on geological record histogram, Beds based on comprehensive histogram, Lithological beds of boreholes, Names and codes of strata, Colors of beds, Configuration oflogging curves, Data from logging curves, and Data dictionary. The data in the Dataset can be read using software developed by Xi'an Shiwen Software Co., Ltd. (also referred to as Shiwen software) to plot 3D stereograms of stratigraphic sedimentary. This will help achieve a more intuitive understanding of the spatial distribution and 3D geological structures of sandstone bodies in Wucaiwan area and thus is significant for the research of the sedimentary environment in this area.

Abstract:The integrated application of existing borehole data has become an urgent need with further prospecting of sandstone-hosted uranium deposits. In this paper, a comprehensive borehole database of Jurassic-Cretaceous strata in Dongsheng area (also referred to as the Database) was established under the guidance of the new ideas and methods of “secondary development and utilization of existing coalfield borehole data” and “coal-uranium joint exploration”. In detail, the borehole attributes of Dongsheng area were collected. Then key borehole data related to coalfields and uranium deposits were successively collated, scanned, converted into desired data types, input into data tables, and integrated into databases according to unified standards and requirements. As a result, the Database was established, achieving unified management of borehole data from multiple sources. The Database consists of three Access databases and corresponding result maps. Each of the Access databases contains eight data tables, namely Basic information of a borehole, Beds based on comprehensive histograms, Beds based on lithologic description, Names and codes of strata, Data from logging curves, Configuration of logging curves, Bending degree measurement of boreholes, etc. These data tables respectively contain detailed data of the lithology from geologic records, beds, rock colors, logging curves, hydrogeological beds, borehole sampling, and bending degree measurement. According to application and practices, the Database enables a quick generation of critical basic geologic maps such as well profiles and the isoline maps of the elevations of roofs and floors, stratum thickness, sand-body thickness, and sand content of target strata bearing coal and uranium. This will increase the data utilization efficiency and provide critical data for the exploration and research of uranium deposits.

Abstract:The Huangling area on the southern margin of the Ordos Basin boasts great potential for uranium mineralization. China Geological Survey has organized and implemented 3D geological survey of the uranium-bearing rock series in this area to seek prospecting target areas of in-situ leachable sandstone-hosted uranium deposits. During the survey, the data of the coalfield boreholes were developed and utilized again to determine exploration areas under the guidance of new ideas of joint coal-uranium explorations and joint petroleum-uranium explorations. As a result, the data of 354 coalfield boreholes (49 potential sandstone-hosted uranium ore boreholes) and 21 verified uranium ore boreholes (16 industrial uranium mineralization boreholes) were acquired and a database was created accordingly. Furthermore, a thematic result atlas and a 3D geologic model were established, which mainly constitute the database. The thematic result atlas includes the isoline maps of stratum thickness, sand body thickness, the burial depth of the roof and floor, sand content and radioactive anomalies of the uranium-bearing rock series. Therefore, the database will provide active support and service for the exploration and development of uranium deposits.