1∶50 000 Geologic Map Database of the Shimen Map Sheet, Henan Province, China

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.