摘要
本文以河南省山西断隆和南秦岭两个细鳞片石墨成矿带为研究对象,通过野外地质调查、样品测试和综合分析等方法,系统研究了细鳞片石墨的分布特征、富集规律及成因机制。研究表明,细鳞片石墨矿体主要赋存于山西断隆银鱼沟群赤山沟组和南秦岭陡岭群大沟组地层中,具有显著的地层赋矿专属性。时空分布特征显示,赋矿地层主要为古元古代,矿床呈北西-南东向展布,与区域构造线方向一致,矿体严格受地层控制且产状与赋矿地层一致。成矿物质来源于有机质与无机质的共同参与,矿床类型为区域变质型。研究进一步揭示,石墨的细小鳞片特征主要受控于构造应力作用、变质作用及混合岩化作用。研究结果为深入认识河南省细鳞片石墨矿的成矿规律提供了科学依据。
This study focuses on two fine-flake graphite metallogenic belts in the Shanxi Fault Uplift and South Qinling regions of Henan Province.Through field geological surveys,sample testing,and comprehensive analysis,the authors systematically investigated the distribution characteristics,enrichment regularity,and genetic mechanism of fine-flake graphite.Research indicates that fine-flake graphite ore bodies primarily occur in the Chishangou Formation of the Yinyugou Group within the Shanxi Fault Uplift and the Dagou Formation of the Douling Group in South Qinling,demonstrating significant stratigraphic specificity.Spatiotemporal distribution analysis reveals that the ore-hosting strata are mainly Paleoproterozoic,with deposits exhibiting a northwest-southeast trend,consistent with regional structural trends.The ore bodies are strictly strata-bound and conformable with the host strata.The ore-forming materials originate from a combination of organic and inorganic sources,with the deposit type classified as regional metamorphic.Further research demonstrates that the fine-flake characteristics of graphite are primarily influenced by tectonic stress,metamorphism and migmatization.These findings provide a scientific basis for a deeper understanding of the metallogenic patterns of fine-flake graphite deposits in Henan Province.
作者
杨贺杰
胡伟
喻艳丽
陈霏霏
YANG Hejie;HU Wei;YU Yanli;CHEN Feifei(Henan Third Geological Brigade Company Limited,Zhengzhou 451464,China)
出处
《世界地质》
2025年第4期597-607,共11页
World Geology
基金
河南省豫地科技集团有限公司科技项目(JTZCKY2023021)。
关键词
细鳞片石墨矿
成矿带
分布特征
成因机制
河南省
fine-flake graphite deposit
metallogenic belt
distribution characteristics
genetic mechanism
Henan Province
