| Mineralization Zoning in Yindongzi—Daxigou Barite—Siderite,Silver—Polymetallic Deposits in the Qinling Orogen,China |
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| 引用本文： | 方维萱,胡瑞忠,等.Mineralization Zoning in Yindongzi—Daxigou Barite—Siderite,Silver—Polymetallic Deposits in the Qinling Orogen,China[J].中国地球化学学报,2001,20(1):45-51. |
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| 作者姓名： | 方维萱 胡瑞忠 |
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| 作者单位： | [1]LaboratoryofOreGeochemistry,InstituteofGeochemistry,ChineseAcademyofSciences,Guiyang550002,China [2]Labo,InstituteofGeochemistry,ChineseAcademyofSciences,Guiyang550002,China |
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| 摘 要： | The Yindongzi-Daxigou strata-bound barite-siderite,silver-polymetallic deposits discovered in the Qinling orogen are hosted within flysch facies in a deep-water fault-controlled basin on the passive northern margin of the Qinling microplate.The orebodies occur in a series of hydrothermal depositonal rocks.Mineralization zoning is characterized by Fe-Ba←Ba-Cu←Pb-Ab→Cu-Ag→Pb→Au.This is obviously a gradational transition mineralization from ventproximal mineralization to more distal mineralization.In this gradational transition between Chefanggou and Yindongzi,vent-proximal mineralization consists of silver-polymetallic orebodies(Pb-Ag),which is the center of hydrothermal mineralization.The Chefanggou Ba-Cu ore district in the west and the Yindongzi Cu-Ag ore district in the east represent vent lateral mineralization.Distal mineralization in the west is represented by the Daxigou Fe-Ba ore district while distal mineralization in te east is represented by the Pb ore district.Thick massive,laminated barren albite chert and jasperite,sometimes with minor silver-ploymetallic mineralization of commercial importance,and pyritization in rocks feature more distal mineralization.Geochemical anomalies of Au-As associations are found in ankerite phyllite and muddy sandstone.Actually,Au deposits are dominantly controlled by the late brittle-ductile shear zone.
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| 关 键 词： | 热水矿化作用 重晶石矿床 银矿床 菱铁矿床 秦岭造山带 中国 |
| 收稿时间： | 20 September 2005 |
Mineralization zoning in Yindongzi-Daxigou barite-siderite, silver-polymetallic deposits in the Qinling orogen, China |
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| Weixuan Fang,Ruizhong Hu,Zhuanying Huang.Mineralization zoning in Yindongzi-Daxigou barite-siderite, silver-polymetallic deposits in the Qinling orogen, China[J].Chinese Journal of Geochemistry,2001,20(1):45-51. |
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| Authors: | Weixuan Fang Ruizhong Hu Zhuanying Huang |
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| Institution: | 1. Laboratory of Ore Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, 550002, Guiyang, China
2. Northwest Geological Exploration Bureau, CNNC, 710054, Xi’an, China
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| Abstract: | The Yindongzi-Daxigou strata-bound barite-siderite, silver-polymetallic deposits discovered in the Qinling orogen are hosted
within flysch facies in a deep-water fault-controlled basin on the passive northern margin of the Qinling microplate. The
orebodies occur in a series of hydrothermal depositional rocks. Mineralization zoning is characterized by Fe-Ba←Ba-Cu← Pb-Ag→Cu-Ag→Pb→Au.
This is obviously a gradational transition mineralization from ventproximal mineralization to more distal mineralization.
In this gradational transition between Chefanggou and Yindongzi, vent-proximal mineralization consists of silver-polymetallic
orebodies (Pb-Ag), which is the center of hydrothermal mineralization. The Chefanggou Ba-Cu ore district in the west and the
Yindongzi Cu-Ag ore district in the east represent vent lateral mineralization. Distal mineralization in the west is represented
by the Daxigou Fe-Ba ore district while distal mineralization in the east is represented by the Pb ore district. Thick massive,
laminated barren albite chert and jasperite, sometimes with minor silver-ploymetallic mineralization of commercial importance,
and pyritization in rocks feature more distal mineralization. Geochemical anomalies of Au-As associations are found in ankerite
phyllite and muddy sandstone. Actually, Au deposits are dominantly controlled by the late brittle-ductile shear zone. |
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