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| 碧口群铜矿床的成矿时限及其意义 | |
| 引用本文： | 丁振举,刘丛强,姚书振,周宗桂.碧口群铜矿床的成矿时限及其意义[J].大地构造与成矿学,1999,23(4):368-372. |
| 作者姓名： | 丁振举 刘丛强 姚书振 周宗桂 |
| 作者单位： | 1. 中国科学院地球化学研究所,贵州贵阳550002;中国地质大学资源学院,湖北武汉430074 2. 中国科学院地球化学研究所,贵州贵阳550002 3. 中国地质大学资源学院,湖北武汉430074 |
| 基金项目： | 国土资源部科技攻关项目;9502002; |
| 摘 要： | 碧口群铜矿床作为早期同生喷流，后期受变质改造的沉积一变质改造型矿床，其保留有同生沉积的纹层构造和后生叠加改造的脉状构造。脉状硫化物Sr同位素及含矿石英脉的Ar同位素定年分别给出329Ma和211．3Ma，说明脉状硫化物的成矿时限在329－211Ma左右。由于该年龄明显小于矿体围岩的Sin－Nd、Rb－Sr年龄，所以该年龄反映了碧口群矿床的后期叠加成矿的时间。 |
| 关 键 词： | 碧口群 成矿时限 同位素 |
| 文章编号： | 1001－1552(1999)04－368－05 |
THE METALLOGENIC TIME OF COPPER DEPOSIT IN BIKOU TERRANE |
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| DING Zheng-ju,LIU Cong-qiang,YAO Shu-zhen,ZHOU Zong-gui.THE METALLOGENIC TIME OF COPPER DEPOSIT IN BIKOU TERRANE[J].Geotectonica et Metallogenia,1999,23(4):368-372. | |
| Authors: | DING Zheng-ju LIU Cong-qiang YAO Shu-zhen ZHOU Zong-gui |
| Abstract: | The copper deposits in the Bikou Group were exhalated to deposit on sealloor in the Proterozoic era and deformed by metamorphic processes later. The deposits with early lamination sedimentary structure and later overprint vein structure are classified into deformed-sedimentary type of ore deposit. Isotopic dating of vein sulfide and ore-bearing quartz show 329 Ma for Rb-Sr and 210 Ma for Ar-Ar, respectively. It indicates that the vein sulfide had generated during from about 329 Ma to 211 Ma. Because the isotope ages are younger than both wall rock Sin-Nd and Rb-Sr, the ages renect the superimposed mineralization time of the Bikou Group copper deposits. |
| Keywords: | Bikou terrane metallogenic time isotope |
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