羊坪湾金矿地质特征及成矿模式
Geological Features and Metallogenic Model of Yangpingwan Gold Deposit
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摘要: 羊坪湾金矿床地处南秦岭南部逆冲推覆系前缘,在该区域已经发现多个金矿床,显示出巨大的找矿潜力.羊坪湾金矿床矿体主要分布在下志留统梅子垭岩组中,控矿围岩为逆冲推覆剪切带内劈理、裂隙发育的含碳二云母石英片岩及二云母片岩.矿石类型主要为含碳二云母(石英)片岩型.围岩蚀变主要有硅化、黄铁矿化、褐铁矿化、黑云母化和绿泥石化.包裹体中流体成分显示成矿是以H2O-CO2-NaCl为主的热液体系.氢、氧同位素特征表明成矿热液中的水介质是原始地层水,硫同位素特征说明黄铁矿、磁黄铁矿中34S来源于地层.矿源层为志留系梅子垭岩组,燕山期逆冲推覆构造控制本区金矿形成.综合上述方面的研究,建立了羊坪湾金矿床成矿模式.
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关键词:
- 成矿模式 /
- 成矿物质来源 /
- 燕山期逆冲推覆剪切构造 /
- 羊坪湾金矿
Abstract: Yangpingwan gold deposit is located in the frontier of the southern thrust nappe of south Qinling. Many gold deposits have been found in this region of great prospecting potential. Yangpingwan gold deposit is distributed in Meiziya formation of early Silurian, the ore-controlling wall rock is carbon-bearing two-mica quartz schist and two-mica schist with developed cleavage and fissure in thrust nappe shear zone. The type of ore is mainly carbon-bearing two-mica quartz schist and two-mica schist. Wall rock alteration is associated with silicification, pyritization, limonitization, biotitization and chloritization. The composition of fluid inclusions shows that the mineralization system is H2O-CO2-NaCl hydrothermal system. The characteristics of isotope of hydrogen and oxygen show that the water medium of ore-forming fluids is the original formation water. Sulfur isotopic characteristics show that the 34S in the pyrite and pyrrhotite is derived from the strata. Meiziya formation of early Silurian is the source bed, the gold ore forming in Yangpingwan gold deposit is controlled by Yanshanian thrust nappe shear zone. Through comprehensive study of these aspects, this paper established the metallogenic model of Yangpingwan gold deposit. -
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胡健民,施炜,渠洪杰, 等. 秦岭造山带大巴山弧形构造带中生代构造变形[J]. 地学前缘,2009,16(3):49-68.
HU Jianmin, SHI Wei, QU Hongjie, et al. Mesozoic Deformation of Dabashan Curvilinear Structural Belt Qinling Orogen[J]. Earth Science Frontiers, 2009, 16(3): 49-68 (in Chinese with English abstract).
李福让,侯俊富,杨弘,等. 陕西石泉县羊坪湾金矿床地质-地球化学特征及金的富集规律[J].中国地质,2009,36(1):59-61
LI Furang, HOU Junfu, YANG Hong, et al. Geological and Geochemical Characteristics and gold Enrichment Regularity of the Yangpingwan Gold Deposit in Shiquan, Shaanxi Province[J]. Geology in China, 2009, 36(1): 59-61
李福让,吕新彪. 陕西南秦岭南部褶皱带贵金属、有色金属成矿规律及找矿方向[J].西北地质,2007,40 (增刊):71-78.
LI Furang, LÜ Xinbiao. Metallogenic Characteristic sand Prospecting Directionfor Non-Ferrous Metals in South of Southern Qinling Fold Belt, Shaanxi Province[J]. Northwestern Geology, 2007, 40 (Suppl.):71-78 (in Chinese with English abstract).
李会民.石泉—汉阴北部金矿带地质特征[J].陕西地质,1997,18(2):48-57.
LI Huimin. The Geological Characteristic of Gold Deposit Belt In the North Shiquan-Hanyin, Shaanxi [J].Geology in Shaanxi,1997, 18(2):48-57. (in Chinese with English abstract).
卢纪英,李作华,张复新,等. 秦岭板块金矿床[M]. 西安:陕西科技出版社,2001.
LU Jiying, LI Zuohua, ZHANG Fuxin, et al. Gold Deposit of Qinling Block[M]. Xi'an: Shaanxi Science and Technology Publishing House,2001 (in Chinese).
陕西省地质矿产局. 陕西省区域地质志[M]. 北京:地质出版社,1989.
Geology and Mineral Resource Bureau of Shaanxi Province, Regional Geology of Shaanxi Province, People's Republic of China [M].
Beijing: Geoscience's Press,1989. (in Chinese with English Contents and brief text).
沈传波,梅廉夫,汤济广,等. 大巴山逆冲推覆带构造扩展变形的年代学制约[J]. 原子能科技技术,2008,42(6):574-576.
SHEN Chuanbo, MEI Lanfu, TANG Jiguang, et al. Geochronology Evidences for Tectonic Deformation of Dabashan Fold-Thrust Belt in Central China[J].Atomic Energy Science and Technology, 2008, 42(6): 574-576(in Chinese with English abstract).
王民良. 石泉县羊坪湾金矿床韧性剪切带及找矿标志[J].西北地质,2007,40 (增刊):30-36.
WANG Minliang. The Feature of Ductile Shear Zone and Ore searching Criteria of Yangpingwan Gold Deposit in Shiquan County [J]. Northwestern Geology, 2007, 40 (Suppl.):30-36 (in Chinese with English abstract).
王平安,陈毓川,裴荣富,等. 秦岭造山带区域矿床成矿系列、构造-成矿旋回与演化[M].北京,地质出版社,1998.
WANG Pingan, CHEN Yuchuan, PEI Rongfu, et al. Regional Minerogenetic Series, Tectono-Ninerogenic Cycles And Evolution In The Qinling Orogenic Belt, China[M]. Beijing:Geology Publishing House, 1998.
王瑞廷,谭兴华,李福让,等.石泉县羊坪湾金矿床成矿模式及找矿模型[J].西北地质,2013,46(2):93-98.
WANG Ruiting, TAN Xinghua, LI Furang, et al. Metallogenic Model and Exploration Pattern of Yangpingwan Shiquan County, Shaanxi Province, China [J]. Northwestern Geology, 2013, 46(2):93-98(in Chinese with English abstract).
原莲肖,任涛,李英,等. 陕西山阳县夏家店金矿物质组分和成矿流体特征及成矿物质来源探讨[J]. 地质与勘探,2007,43(5):68-73.
YUAN Lianxiao, REN Tao, LI Ying, et al. Component, Ore-forming Fluids and Material Sources in the Xiajiadian Gold Deposit of Shanyang county Shaanxi [J]. Geology and Prospect, 2007, 43(5):68-73 (in Chinese with English abstract).
张复新,季军良,龙灵利,等. 南秦岭卡林型—似卡林型金矿床综合地质地球化学特征[J].地质论评,2001,47(5):492-499.
ZHANG Fuxin,JI Junliang, LONG Lingli, et al. Comparative Features of Carlin Para-Carlin Type Gold Deposits in the South Qinling and Gold Deposits in Other Areas[J]. Geological Review,2001,47(5):492-499 (in Chinese with English abstract).
张国伟,张本仁,袁学诚,等. 秦岭造山带与大陆动力学[M].北京:科学技术出版社,2001.
ZHANG Guowei, ZHANG Benren, YUAN Xuecheng,et al. Qinling Orogenic Belt and Continental Dynamics[M].Beijing: Science Press,2001 (in Chinese with English Contents and abstract).
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