| 北祁连造山带两种构造基底岩块及成矿系统 |
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| 引用本文： | 汤中立,白云来.北祁连造山带两种构造基底岩块及成矿系统[J].甘肃地质学报,2001,10(2):1-11. |
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| 作者姓名： | 汤中立 白云来 |
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| 作者单位： | [1]甘肃省地勘局,甘肃兰州730000 [2]中国地质大学（北京）,北京100083 |
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| 基金项目： | 原地质矿产部前沿科技研究项目 (编号 95 0 110 7),甘肃省科技攻关项目 (GS0 0 2 - 132 5 - 0 6 2 )部分成果 |
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| 摘 要： | 北祁连造山带中存在“南方型”和“北方型”构造基底岩块。“南方型”构造基底岩块和柴达木古陆相似 ,“北方型”构造基底岩块则和华北古陆相似。两种不同的构造基底岩块随着祁连洋的消失而相遇于北祁连造山带 (缝合带 )中。在祁连洋的俯冲过程中 ,形成了不同的成矿系统 ,与“北方型”构造基底岩块有关的成矿系统为加里东期活动大陆边缘成矿系统———白银、清水沟铜及多金属成矿组合 ;与“南方型”构造基底岩块有关的成矿系统为中、新元古代活动大陆边缘弧后裂解成矿系统———镜铁山—柳沟峡铁成矿组合 ,加里东期活动大陆边缘与俯冲作用有关的成矿系统———岩浆热液钨成矿组合及铅锌成矿组合。两种构造基底岩块的确认 ,可为北祁连缝合带的成矿系统的建立及找矿工作 ,提供新的思路 ,也为北祁连造山带性质的认定 ,提供成矿作用信息方面的限制。
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| 关 键 词： | 北祁连造山带 两种构造基底岩块 成矿系统 |
THE TWO TYPES OF THE TECTONIC FOUNDATION BLOCK AND ITS METALLOGENIC SYSTEMS IN THE NORTHERN QILIANSHAN OROGENIC BELT |
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| TANG Zhong-li ,BAI Yun-lai.THE TWO TYPES OF THE TECTONIC FOUNDATION BLOCK AND ITS METALLOGENIC SYSTEMS IN THE NORTHERN QILIANSHAN OROGENIC BELT[J].Acta Geologica Gansu,2001,10(2):1-11. |
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| Authors: | TANG Zhong-li BAI Yun-lai |
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| Institution: | TANG Zhong-li 1,BAI Yun-lai 2 |
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| Abstract: | In this paper,the two type of the tectonic foundation block "The North type" and "The South type" in the Northern Qilianshan orogenic belt is proposed firstly."The South type" tectonic foundation block is similar to the Qaidam ancient massif and "The North type" tectonic foundation block is similar to the Northchina paleocontient.The characteristics of the two types tectonic foundation block are different and they meet in the Northern Qilianshan orogenic belt (Suture zone) with the Qilian oceanic basin disappeared.The various metallogenic systems are formed when the Qilian oceanic plate subducts.The metallogenic systems associated with "The North type" are the active continental marginal metallogenic systems in the caledonian cycle (such as Baiyin-Qingshuigou copper polymetallic metallogenic assemblage).The metallogenic systems relating to "The South type" are the divergent metallogenic systems in the Back-are environment concerning the active continental marginal split in the mesoneoproterozoic (such as Jingtieshan-liugouxia iron assemblage) and the metallogenic systems relating to subduction in the active continental margin in the caledonian cycle (such as the magmatic-hydogenesis type wolfram and lead-zinc metallogenic assemblages.The determination of the feature of the two types tectonic foundation block could be able to give a new thinking in establishing the metallogenic systems and further mineral deposit exploration on the Northern Qilianshan mountain suture zone.It is also a constraint for determining the characterics of the Northern Qilianshan orogenic belt on metallogenesis. |
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| Keywords: | The Northern Qilian orogenic belt Two type tectonic foundation block The metallogenic systems |
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