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引用本文:丁建华,张勇,李立兴,李厚民. 中国钛矿成矿地质特征与资源潜力评价[J]. 中国地质, 2020, 47(3): 627-644.
DING Jianhua,ZHANG Yong,LI Lixing,LI Houmin. Metallogenic geological characteristics and titanium resources potential in China[J]. Geology in China, 2020, 47(3): 627-644(in Chinese with English abstract).
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中国钛矿成矿地质特征与资源潜力评价
丁建华, 张勇, 李立兴, 李厚民
中国地质科学院矿产资源研究所, 国土资源部成矿作用与资源评价重点实验室, 北京 100037
摘要:
钛金属因其性能特殊和用途广泛而被称之为“第三金属”。中国钛矿资源丰富,占世界总资源储量的24.46%,但多为含钛量偏低的原生矿,高品位优质钛矿的需求只能通过进口来满足,导致中国钛的对外依存度偏高,为此,需要进一步总结规律,分析潜力,为今后地质找矿工作提供借鉴。本文根据中国钛矿的成矿特征,将钛矿划分为岩浆型、变质型、风化型和(第四纪)沉积型4种类型。其中,岩浆型矿床主要为岩浆分异作用形成的钛铁矿-磁铁矿(钛磁铁矿),分布较广,主要集中于攀西地区近SN向基性—超基性岩带和华北地台北缘近EW向基性-超基性岩带;变质型矿床与区域变质作用关系密切,较为重要的是榴辉岩(榴闪岩)型金红石矿床,主要受控于高压/超高压变质带;风化型矿床受控于富Ti原岩和高温多雨的气候环境,多产于湿热的云南和广西;滨海沉积型矿床则沿海分布,主要分布在海南岛的东岸。本次钛矿资源潜力评价工作在全面总结全国钛矿成矿规律的基础上,圈定111个3级预测区并估算资源潜力,包括A类预测区22个,B类预测区27个,C类预测区62个;笔者最后优选了12个预测区并进行了详细评价,建议做为今后钛矿的找矿部署优先考虑的重点远景区。
关键词:  钛矿  成矿规律  资源潜力评价  中国
DOI:10.12029/gc20200305
分类号:P618.47
基金项目:中国地质调查局项目“全国矿产资源潜力动态评价(2019-2021)”(DD0190193)资助。
Metallogenic geological characteristics and titanium resources potential in China
DING Jianhua, ZHANG Yong, LI Lixing, LI Houmin
Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, CAGS, Beijing 100037, China
Abstract:
Titanium is known as "the third metal" for its special characteristics and wide range of uses. China is rich in titanium resources, which account for 24.46% of the world's total reserves. As most of China's titanium resources are low-grade primary ores, China has to import high-grade and high-quality ores to meet its demand. Hence, further geological metallogenic studies of titanium resource potential are urgently needed so as to provide a reference for future geological prospecting work. In this paper, Ti deposits are classified into 4 types, i.e., magmatic type, metamorphic type, weathering type and (Quaternary) sedimentary type. The magmatic type Ti deposits were formed by magmatic differentiation and are widely distributed. The most important ore deposits are mainly concentrated in Panxi ultrabasic rock belt and northern margin of the North China platform basic-ultrabasic rock belt. Metamorphic type Ti deposits are closely related to regional metamorphism. The important ore deposits are eclogite type (garnet-amphibolite type) rutile deposits, which are controlled by HP/UHP metamorphic zones. Weathering Ti deposits are controlled by Ti-rich original rock and hot rainy weather and are mostly distributed in Yunnan and Guangxi. Littoral sedimentary placer deposits are distributed along the east coast, especially in the east coast of Hainan Island. During the prediction of this type of Ti resources, the authors delineated 111 prospective areas and predicted the resource potential according to comprehensive summary of titanium resource ore-forming regularities, These prospective areas include 22 class A ones, 27 class B ones and 62 class C ones. Finally, the authors sorted out 12 prospecting areas with better metallogenic geological conditions for the future prospecting work.
Key words:  titanium  metallogenic regularity  mineral resource potential prognosis  China