| 吕增尧.张麻井铀钼矿床地质特征及沽源盆地找矿思路[J].矿产勘查,2012,3(4):452-457 |
| 张麻井铀钼矿床地质特征及沽源盆地找矿思路 |
| Geological characteristics of uranium-molybdenum deposit in Zhangmajing and prospecting idea for Guyuan Basin |
| 投稿时间：2012-06-01 |
| DOI： |
| 中文关键词: 燕山造山带 火山—沉积盆地 次流纹斑岩 隐爆角砾岩 |
| 英文关键词: Yanshan orogenic belt volcanic-sedimentary basin Sub-rhyolite-porphyry cryptoexplosive breccia |
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| 摘要点击次数: 1984 |
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| 中文摘要: |
| 燕山造山带形成于中生代,由于构造、火山活动,产生一系列断陷盆地,与隆起带相间出现,有等间距特点。张麻井大型铀钼矿床位于蔡家营—双脑包次级火山构造洼陷带内。主要为次流纹斑岩体控制,赋存于次流纹斑岩体顶部隐爆角砾岩中。在古太古代末基底发生强烈变质作用,成矿元素第一次富集。中生代的火山热液活动,成矿元素第二次富集。经多期次热液活动,在隐爆角砾岩部位形成富矿体。 |
| 英文摘要: |
| Yanshan orogenic belt was formed in Mesozoic era, a series of faulted basins and uplift belt appear alternatively with the characteristics of equal interval because of tectonic, volcanic activity.The Zhangmajing large uranium-molybdenum deposit is located in secondary volcanic-tectonic depression belt of Caijiaying-Shuangnaobao, and is controlled by the subrhyolite-porphyry to host in cryptoexplosive breccia on top of subrhyolite-porphyry. The strong metamorphism happening in basement at late early-archean resulted in the first enrichment for ore-forming elements. The Mesozoic volcanic hydrothermal fluid activities resulted in the second one. So the oreshoots were formed in cryptoexplosive breccia by multiperiodic hydrothermal activities. |
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