Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第29卷    第8期    总第245期    2019年8月

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文章编号:1004-0609(2019)-08-1756-15
豫西崤山矿集区金矿成矿地质条件与控矿规律
刘文毅1, 2, 3,刘继顺1, 2,何美香3,丁云河3,王秀全4,李永峰5

(1. 中南大学 有色金属成矿预测与地质环境监测教育部重点实验室,长沙 410083;
2. 中南大学 地球科学与信息物理学院,长沙 410083;
3. 河南省有色金属地质矿产局 第七地质大队,郑州 450016;
4. 河南省有色金属地质矿产局 第一地质大队,郑州 450016;
5. 河南省有色金属矿产探测工程技术研究中心,郑州 450016
)

摘 要: 崤山地区位于河南省西部,大地构造位置位于华北陆块南缘,属于小秦岭-崤山-熊耳山金-银-钼多金属成矿带,成矿地质条件有利,但找矿效果不明显。崤山地区金矿成矿地质条件与控矿规律研究不系统,尚未形成一套完整的成矿理论体系。对区内金矿进行成矿年代、硫同位素、铅同位素、氢氧同位素和流体包裹体研究。结果表明:崤山地区金矿成矿物质来源主要为壳幔混合源,以地幔为主;成矿流体为幔源流体、大气降水和变质流体的混合流体;成矿温度为中低温(136~379 ℃,平均232 ℃);成矿盐度为中等盐度(0.20%~27%,平均8.22%);成矿流体密度为低密度(0.65~1.13 g/cm3,平均0.88g/cm3);成矿流体压力为5~69 MPa;成矿深度估算为0.43~5.90 km;成矿时代为燕山晚期。结合区内金矿的成矿地质背景、成矿物质来源及控矿规律的综合分析,建立研究区成矿模式。

 

关键字: 崤山;金矿;控矿规律;成矿模型

Geological ore formation conditions and ore-controlling rules in Xiaoshan gold ore district in western Henan
LIU Wen-yi1, 2, 3, LIU Ji-shun1, 2, HE Mei-xiang3, DING Yun-he3, WANG Xiu-quan4, LI Yong-feng5

1. Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring, Ministry of Education, Central South University, Changsha 410083, China;
2. School of Geoscience and Info-Physics, Central South University, Changsha 410083, China;
3. No.7 Geological Team, Bureau of Nonferrous Metals Geology and Mineral Resources of Henan Province, Zhengzhou 450016, China;
4. No.1 Geological Team, Bureau of Nonferrous Metals Geology and Mineral Resources of Henan Province, Zhengzhou 450016, China;
5. Non-Ferrous Mineral Exploration Engineering Research Center of Henan Province, Zhengzhou 450016, China

Abstract:The Xiaoshan area is located in the west of Henan Province, China, tectonically located in the southern margin of North China block, belonging to Xiaoqinling-Xiaoshan-Xiong’ershan Au-Ag-Mo polymetallic metallogenic belt. The ore-forming geological conditions are favorable, but the prospecting effect is not obvious. The study of metallogenic geological conditions and ore-controlling rules of gold deposits in Xiaoshan area is not systematic, and the metallogenic theory system is not perfect. Through the research on the metallogenic age, sulfur isotope, lead isotope, hydrogen and oxygen isotope and fluid inclusion, the results show that the metallogenic material of gold deposits in Xiaoshan area is mainly from crust-mantle mixed materials, mainly mantle. The ore-forming fluid is a mixture of mantle derived fluids, meteoric water and metamorphic fluids. The metallogenic temperature is medium low temperature (from 136 ℃ to 379 ℃, with average value of 232 ℃). The salinity of mineralization is moderate salinity (from 0.20% to 27%, with average value of 8.22%). The density of ore-forming fluid is low density (from 0.65 to 1.13 g/cm3, with average value of 0.88 g/cm3). The ore-forming fluid pressure is 5-69 MPa. The metallogenic depth is estimated to be 0.43-5.90 km. The minerogenetic epoch belongs to late Yanshanian. Based on the comprehensive analysis of metallogenic geological background, the metallogenic material source and ore controlling regularity of gold deposits in this area, the metallogenic model of the study area is established.

 

Key words: Xiaoshan; gold deposit; ore-controlling rule; metallogenic model

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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