| 北祁连山中西段塞浦路斯型铜矿特征、成矿作用及找矿标志 |
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| 引用本文： | 杨合群,宋忠宝,王兴安,李文明,李长安,赵东宏.北祁连山中西段塞浦路斯型铜矿特征、成矿作用及找矿标志[J].西北地质,2002,35(4):65-85. |
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| 作者姓名： | 杨合群 宋忠宝 王兴安 李文明 李长安 赵东宏 |
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| 作者单位： | 西安地质矿产研究所,陕西,西安,710054 |
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| 基金项目： | 中国地质调查局“甘肃北祁连山错沟—寺大隆一带铜矿预测与评价”项目 (编号 :
2 0 0 0 10 2 0 0 15 2 ) |
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| 摘 要： | 本文总结北祁连山中西段塞浦路斯型铜矿特征及找矿标志 ,获得如下认识 :1成矿环境为奥陶纪亲弧扩张脊 (岛弧扩张脊和弧后扩张脊 ) ,容矿岩石为蛇绿岩套上部火山 -沉积岩系 ;矿床成矿金属组合为铜锌 ,贫铅 ;2矿床地质模型为蘑菇状 ,蘑菇茎代表沿热液通道的柱状矿体 ,蘑菇伞代表在热液喷流口周围海底展开的透镜状、似层状矿体 ,伞翼之下为基性火山岩 ,伞上常覆盖碧玉岩 ,成矿环境不稳定时 ,缺失碧玉岩。近喷流口位置矿体 Cu>Zn,远喷流口位置矿体 Cu
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| 关 键 词： | 成矿作用 找矿标志 祁连山 铜矿床 地质构造 成矿环境 |
| 文章编号： | 1009-6248(2002)04-0065-21 |
| 修稿时间： | 2002年5月27日 |
The characteristics,mineralization and prospecting indi-cations of Cyprus-type copper deposits in mid-west section of the North Qilian mountains,China |
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| YANG He qun,SONG Zhong bao,WANG Xing an,LI Wen ming,LI Chang an,ZHAO Dong hong.The characteristics,mineralization and prospecting indi-cations of Cyprus-type copper deposits in mid-west section of the North Qilian mountains,China[J].Northwestern Geology,2002,35(4):65-85. |
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| Authors: | YANG He qun SONG Zhong bao WANG Xing an LI Wen ming LI Chang an ZHAO Dong hong |
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| Abstract: | The characteristics and prospecting indications of Cyprus type copper deposits in mid west sect of the North Qilian mountains are summarized in the paper And the conclusions are as follows: (1)The metallogenic setting was arc related spreading ocean ridges(island arc and back arc spreading ocean ridges) in Ordovician period The host rock belongs to volcanic rocks or volcanic sedimentary rocks in the upper part of ophiolite suite The assemblage of main metallogenic metals was Cu Zn type (2)The geological model of the deposits was mushroom shaped The stem of mushroom delegated columnar ore body along pathway of the hydrothermal solution and the umbrella of mushroom delegated lentoid and stratiform like ore body spreading in the seabed near the spout of the hydrothermal solution, as well as under limb of the umbrella, there is basic volcanic rock The umbrella is often covered by jaspilite, but no jaspilite exicts when the metallogenic setting was not steady The ore body was Cu>Zn near the spout of the hydrothermal solution ,and Cu
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| Keywords: | the North Qilian mountains arc related spreading ocean ridges Cyprus type copper deposits |
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