| 韧性剪切带及其控矿作用——以新疆康古尔金矿为例 |
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| 引用本文： | 张连昌,姬金生,曾章仁,杨兴科,赵伦山,蒙义峰.韧性剪切带及其控矿作用——以新疆康古尔金矿为例[J].地质与资源,1999,8(1):1-6. |
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| 作者姓名： | 张连昌 姬金生 曾章仁 杨兴科 赵伦山 蒙义峰 |
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| 作者单位： | 1. 中国地质大学(北京);2. 西安工程学院 |
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| 摘 要： | 康古尔金矿具有独特的成矿地质特征，矿床位于石炭系火山岩区大型韧性剪切带的次级构造中.控矿构造表现为脆韧性剪切活动的特点，该脆韧性剪切带在成矿期的活动具有中低温、高应变速率、高差异应力的动力学特征.金矿床的分布受脆韧性剪切带控制，矿体由蚀变千糜岩和糜棱岩化火山岩中矿化富集地段组成，矿体产状平行于糜棱岩面理.矿化产于脆韧性变形强烈部位，脆性变形叠加有利于形成富金矿.
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| 关 键 词： | 金矿床 脆韧性剪切带 控矿构造 构造动力学 新疆康古尔 |
| 收稿时间： | 1998-03-03 |
THE DUCTILE SHEAR ZONE AND ITS ORE CONTROLLING PROCESS WITH AN EXAMPLE FROM KANGGUL GOLD DEPOSIT,XINJIANG |
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| Zhang Lianchang Ji Jinsheng Zeng Zhangren Yang Xingke Zhao Lunshan Meng Yifeng China University of Geosciences,Beijing Xi'an Engineering University,Xi'an.THE DUCTILE SHEAR ZONE AND ITS ORE CONTROLLING PROCESS WITH AN EXAMPLE FROM KANGGUL GOLD DEPOSIT,XINJIANG[J].Geology and Resources,1999,8(1):1-6. |
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| Authors: | Zhang Lianchang Ji Jinsheng Zeng Zhangren Yang Xingke Zhao Lunshan Meng Yifeng China University of Geosciences Beijing Xi'an Engineering University Xi'an |
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| Institution: | 1. China University of Geosciences, Beijing 100083;2. Xi'an Engineering University, Xi'an 710054 |
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| Abstract: | The Kanggul gold deposit is located within the northern Paleozoic Aqishan Yamansu island arc belt in the north of Tarim plate.The outcropping stratum in the mining area is mainly Lower Carboniferous Aqishan formation,which consists of andesite,tuff and other volcanic rocks.The Kanggul gold deposit has rather unique metallogenic characteristics.It occurs in a second order shear zone near the Qiugemingtashi Huangshan large size ductile shear zone.The shear zone has experienced a history from ductile to brittle ductile and brittle shear deformation.The distribution of gold deposits is strictly controlled by a brittle ductile deformation zone,which spreads along NEE direction and inclines northwards with a dip angle of 75 o or so.The shear zone shows characteristics of ductile deformation such as S C fabric,rotational mortar system,dynamic recrystallization, etc.Ore bodies,hosted by altered phyllonite and mylonitized volcanic rocks,are paralleled to the mylonite zone.Ore bodies always occur in the segments with the most intense deformation.Ore bodies show platy,lens shaped and imbricated occurrence.The ore minerals are very simple.Pyrite and magnetite are major metallic minerals,while chalcopyrite,galena and sphalerite are secondary.Of the gold minerals,native gold is dominant,followed by electrum.Chloritization,sericitization and silication are the mostly common wall rock alteration.The veinlet,dissemination and brecciform are major ore structures. The metallogenic process presents multiperiod and multistage.The dominant metallogenic (altered rock type)process is after the ductile deformation,and related to inherited brittle ductile deformation.There are obvious relationship and horizontal zoning between the shear deformation,alteration and mineralization.The geochemical study of this gold deposit shows that the ore forming material comes from surrounding volcanic rocks,the ore forming fluid consists of metamorphic water and meteoric water,and the age of main ore forming stage is closed to that of brittle ductile shear deformation.These characteristics indicate that the formation,evolution and location of ore bodies are controlled by ductile shear zone. |
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| Keywords: | gold deposit\ volcanic rock\ ductile shear zone\ ore controlling structure\ Kanggul of\ Xinjiang |
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