| 邱庆伦,燕长海,陈瑞保,卢书炜.小秦岭—熊耳山地区燕山期大规模成矿的地球动力学背景[J].地质找矿论丛,2008,(4):281-286 |
| 小秦岭—熊耳山地区燕山期大规模成矿的地球动力学背景 |
| THE GEODYNAMIC SETTINGS OF YANSHANIAN LARGE-SCALE METALLOGENIC PULSES IN XIAOQINLING-XIONG'ERSHAN AREA |
| 投稿时间：2007-10-29 |
| DOI：10.6053/j.issn.1001-1412.2008.4. 003 |
| 中文关键词: 大规模成矿作用 燕山期 地球动力学背景 小秦岭—熊耳山地区 |
| 英文关键词:Large scale metallogeny Yanshan Epoch Geodynamic settings Xiaoqinling-Xiong'ershan Area |
| 基金项目:河南省矿产资源潜力评价项目(资[2007]038-01-15)资助 |
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| 中文摘要: |
| 基于小秦岭—熊耳山地区多金属矿床辉钼矿Re-Os模式年龄、矿物40Ar-39Ar年龄、高精度矿物和岩石Rb-Sr等时线测年数据,以及与成矿相关花岗岩的SHRIMP测年数据的分析和研究,认为小秦岭—熊耳山地区燕山期大规模成矿作用主要出现在140Ma和120Ma两个时期,其中钼钨铅锌矿系列主要形成于早成矿期,金矿形成于晚成矿期.根据与这两个成矿期所对应的岩浆热事件,说明是两期岩浆活动的结果,其所对应的地球动力学背景分别为构造体制大转换和岩石圈大规模拆沉作用下的伸展环境. |
| 英文摘要: |
| Based on the research and analysis of molybdenite Re-Os model age of the polymetal ore deposits in Xiaoqinling-Xiong'ershan Area,and mica,potash feldspar,quartz 40Ar-39Ar age,rock Rb-Sr isochrone age data,along with SHRIMP U-Pb data of Yanshanian ore deposits-related granites a conclusion is made that large scale mineralization was mainly concentrated at about 140 Ma and 120 Ma,the two periods during Yanshan Epoch in the area.The Mo-W-Pb-Zn mineralization series mainly occurred in the early period,whereas gold mineralization series in the later one.Thus the two mineralization series belong to different magma thermal events that correspond to the extensional geodynamic settings of the tectonic regime changing and lithosphere thinning process respectively. |
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