| 陈伟军.内蒙古鸡冠山钼矿流纹斑岩的成岩年龄及地质意义[J].地质与勘探,2015,51(6):1107-1113 |
| 内蒙古鸡冠山钼矿流纹斑岩的成岩年龄及地质意义 |
| Diagenetic age of rhyolite porphyry in the Jiguanshan Mo deposit, Inner Mongolia and its geological implications |
| 投稿时间：2014-09-30 修订日期：2015-08-26 |
| DOI： |
| 中文关键词: 西拉沐伦钼矿带 流纹斑岩 SIMS锆石U-Pb年龄 鸡冠山钼矿 内蒙 |
| 英文关键词: Xilamulun molybdenum metallogenic belt, rhyolite porphyry, zircon SIMS U-Pb isotopic dating, Jiguanshan Mo deposit, Inner Mongolia |
| 基金项目: |
|
| 摘要点击次数: 2870 |
| 全文下载次数: 1539 |
| 中文摘要: |
| 内蒙古鸡冠山钼矿床是近年来发现的一个大型斑岩型钼矿床，位于华北克拉通北缘、西拉沐沦钼矿带的中段，产出于一破火山机构的NW侧。矿床矿石矿物辉钼矿Re-Os同位素等时线法测得成矿年龄为151.1±1.3Ma，为晚侏罗世成矿。本文通过SIMS锆石U-Pb年龄法，测定流纹斑岩成岩年龄为148.5±3.3Ma（U-Pb等时线年龄，2σ,MSWD=2.2），为晚侏罗世成岩。该成岩年龄与成矿年龄在误差范围内一致，说明与流纹斑岩有关的岩浆活动可能为成矿的母岩浆，成岩与成矿近乎同时发生。 |
| 英文摘要: |
| The Jiguanshan Mo deposit of Inner Mongolia is a newly discovered large porphyry type Mo deposit. It is located in the middle Xilamulun molybdenum ore belt, northwest side of a caldera in the northern margin of the North China craton. The molybdenite Re-Os isotope isochron method measured metallogenic age to be 151.1±1.3Ma, indicating mineralization in the late Jurassic. In this work, zircon SIMS U-Pb isotopic dating is used to estimate the diagenetic age of rhyolite porphyry, yielding 148.5±3.3Ma （U-Pb isochron age, 2σ, MSWD=2.2）. It shows the rhyolite porphyry formed in the late Jurassic, largely in agreement with the mineralization age in the range of error. We suggest that the rhyolite porphyry magmatism may be ore-forming parent magma, and diagenesis and mineralization occurred at approximately the same time. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
