%0 Journal Article
%T 东秦岭石瑶沟钼矿床地质特征及成因<br>Geological Characteristics and Genesis of Shiyaogou Molybdenum Deposit in East Qinling
%A 侯红星
%A 张德会
%A 张荣臻
%A 邵兴坤
%A 冯欣
%A 张中跃
%A 秦丹鹤
%J Open Journal of Nature Science
%P 504-516
%@ 2330-1732
%D 2021
%I Hans Publishing
%R 10.12677/OJNS.2021.94057
%X 东秦岭是世界著名的钼矿带，石瑶沟钼矿是东秦岭豫西地区近年来发现的又一个与花岗岩相关的大型钼矿床，含矿岩体隐伏于地下没有出露地表，钼矿体主要产在隐伏岩体内外接触带及上部围岩中。笔者在开展大量野外调查和钻孔岩芯观察的基础上，结合石瑶沟含矿隐伏花岗岩成岩成矿作用特征、氢氧同位素特征等，探讨了石瑶沟钼矿成矿流体来源和矿床成矿机理。石瑶沟含矿花岗岩体为高硅、铝质、富碱的I型花岗岩，结晶年龄为(136.53 ± 0.44) Ma，略早于前人测的石瑶沟钼矿成矿年龄(131.3 ± 2.4~134.3 ± 2.6 Ma)，表明石瑶沟钼矿成岩、成矿作用处于同一构造环境，均发生在早白垩世。石瑶沟钼矿成岩成矿物质主要来源于下地壳，是早白垩世岩石圈伸展环境下的岩石圈减薄和热侵蚀事件的响应。石瑶沟钼矿的发现及其成岩成矿地质特征的研究，对在东秦岭地区寻找同类型的钼矿床提供了最直接的找矿标志，具有重要的实际意义。<br />
East Qinling is a famous molybdenum ore belt in the world. Shiyaogou deposit is another large-scale granite related molybdenum deposit discovered in recent years in West Henan area of East Qinling. The ore-bearing rock is concealed underground and not exposed on the surface. The molybdenum ore body mainly occurs in the internal and external contact zone of the concealed granitic body and the upper wall rock. On the basis of a large number of field investigations and core observation, combined with the characteristics of diagenesis and mineralization, hydrogen and oxygen isotopes of Shiyaogou ore bearing concealed granite, the author discussed the source of ore-forming fluid and metallogenic mechanism of the deposit. Shiyaogou ore bearing granite is a high silicon, aluminous and alkali rich I-type granite with a crystallization age of (136.53 ± 0.44) Ma, slightly earlier than the metallogenic age of Shiyaogou molybdenum deposit (131.3 ± 2.4~134.3 ± 2.6 Ma), which indicates that Shiyaogou molybdenum deposit was formed in the same tectonic environment and occurred in the early Cretaceous. Shiyaogou molybdenum deposit is mainly derived from the lower crust, which is the response of lithospheric thinning and thermal erosion in the early Cretaceous lithospheric extension environment. The discovery of Shiyaogou molybdenum deposit and the study of its geological characteristics of diagenesis and mineralization provide the most direct prospecting criteria for the same type of molybdenum deposits in the East Qinling Mountains, which has important practical significance.
%K 隐伏花岗岩体，成矿机理，石瑶沟钼矿，东秦岭<br>Concealed Granitic Body
%K Metallogenic Mechanism
%K Shiyaogou Molybdenum Deposit
%K East Qinling
%U http://www.hanspub.org/journal/PaperInformation.aspx?PaperID=44194