| 甘肃白银厂矿区及外围区域地质背景、成矿系列及找矿潜力 |
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| 引用本文： | 张洪培,刘继顺,方维萱,马光.甘肃白银厂矿区及外围区域地质背景、成矿系列及找矿潜力[J].地质与勘探,2004,40(5):21-26. |
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| 作者姓名： | 张洪培 刘继顺 方维萱 马光 |
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| 作者单位： | 1. 中南大学地学与环境工程学院,长沙,410083
2. 中国科学院地球化学研究所矿床地球化学开放研究实验室,贵阳,550002 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)，国家自然科学基金 |
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| 摘 要： | 白银厂矿区及外围是北祁连铜多金属成矿带的主要地段.新元古代以来的大陆裂谷作用-活动陆缘的洋壳俯冲、弧后扩张-陆-陆碰撞造山作用,及其所导致的强烈多期次的火山活动、岩浆侵入及变质作用,为本区提供了优越的成矿条件.区内既有与岛弧海相酸性火山作用有关的白银厂黑矿型Cu-Pb-Zn-Au-Ag成矿系列,又有与弧后扩张脊蛇绿岩套和基性火山岩有关的塞浦露斯型Cu-Zn(Co)系列;与大陆裂陷火山作用有关的喷流沉积型Fe-Cu-Zn-Pb系列以及陆内造山早期与韧-脆性剪切作用有关的Au-Pb系列和与酸性岩浆作用有关的Au-Cu系列等.石青硐-白银厂火山岩带是本区最有找矿潜力、也是快速实现找矿突破的首选区带;朵家滩-白银南-青城皋兰群变质火山岩带,是值得探索的大型喷流沉积型Fe-Cu-Zn-Pb矿床远景区;老虎山-银洞沟-崛吴山火山岩带的塞浦露斯型Cu-Zn(Co)矿床具有扩大资源量和进一步发现矿床的前景;韧-脆性剪切带型Au矿床及与酸性侵入体有关的岩浆期后热液型Au-Cu矿床是两个具有重要意义的找矿新方向.
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| 关 键 词： | 白银厂 地质背景 成矿系列 找矿潜力 |
| 文章编号： | 0495-5331(2004)05-0021-06 |
| 修稿时间： | 2003年7月5日 |
GEOLOGICAL SETTING,METALLOGENIC SERIES AND PROSPECTING POTENTIALITY IN THE BAIYINCHANG MINE AND OUTSKIRTS,GANSU PROVINCE |
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| ZHANG Hong-pei,LIU Ji-shun,FANG Wei-xuan,MA Guang.GEOLOGICAL SETTING,METALLOGENIC SERIES AND PROSPECTING POTENTIALITY IN THE BAIYINCHANG MINE AND OUTSKIRTS,GANSU PROVINCE[J].Geology and Prospecting,2004,40(5):21-26. |
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| Authors: | ZHANG Hong-pei LIU Ji-shun FANG Wei-xuan MA Guang |
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| Institution: | ZHANG Hong-pei~1,LIU Ji-shun~1,FANG Wei-xuan~2,MA Guang~1 |
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| Abstract: | Baiyinchang mine and its outskirts are important area of the northern Qilian metallogenic belt, Gansu province. A series of tectonic processes, including continental rifting, active marginal oceanic crust subduction, back-arc basin extension, and continent-continent collision from early Palaeozoic to early Devonian, resulted in intense, poly-phase volcanic eruptions and magma intrusions, and provided excellent metallogenic factors. 63 Cu, Pb, Zn, Au, Ag and Fe deposits or occurrences in the area have been found, which can be divided into Fe-Cu-Pb-Zn series, Cu-Pb-Zn-Au-Ag series, Cu-Zn(Co) series, Au-Pb series and Au-Cu series. Shiqingdong-Baiyinchang volcanic rock belt is the most favorable prospecting area. There is a potential to find the new Cyprus-type deposits or to increase the mineral reserve in Laohushan-Yindonggou-Quwushan. Au deposits occurring in ductile-brittle shear zone and Au-Cu deposits associated with acid intrusions are all the significant new prospecting directions. |
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| Keywords: | Baiyinchang geological setting metallogenic series prospecting potentiality |
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