| 柴达木北缘滩间山群时代及其地质意义 |
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| 引用本文： | 李峰,吴志亮,李保珠.柴达木北缘滩间山群时代及其地质意义[J].大地构造与成矿学,2007,31(2):226-233. |
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| 作者姓名： | 李峰 吴志亮 李保珠 |
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| 作者单位： | 昆明理工大学,国土资源工程学院,云南,昆明,650093 |
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| 摘 要： | 滩间山群是柴北缘早古生代重要的火山-沉积建造。基于野外地质特征、古生物组合、同位素年龄、构造-热事件等的综合分析,本文认为滩间山群形成于早-晚奥陶世,时限496~440Ma,与该区超高压变质作用不同步,后者时限545~485Ma。新的滩间山群火山-沉积建造序列表明,柴北缘从新元古代-早古生代可能存在两次构造开合演化过程。
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| 关 键 词： | 柴达木盆地北缘 滩间山群 时代 构造演化 |
| 文章编号： | 1001-1552(2007)02-0226-08 |
| 修稿时间： | 2006-06-21 |
RECOGNITION ON FORMATION AGE OF THE TANJIANSHAN GROUP ON THE NORTHERN MARGIN OF THE QAIDAM BASIN AND ITS GEOLOGICAL SIGNIFICANCE |
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| LI Feng,WU Zhiliang,LI Baozhu.RECOGNITION ON FORMATION AGE OF THE TANJIANSHAN GROUP ON THE NORTHERN MARGIN OF THE QAIDAM BASIN AND ITS GEOLOGICAL SIGNIFICANCE[J].Geotectonica et Metallogenia,2007,31(2):226-233. |
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| Authors: | LI Feng WU Zhiliang LI Baozhu |
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| Institution: | Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming, YN 650093, China |
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| Abstract: | The Tanjianshan Group is distributed on the northern margin of the Qaidam basin and is an important volcanic-sedimentary formation in Early Palaeozoic. Based on analyses of its field geological features, palaeontological association, isotope age, tectono-thermal event and volcanic-sedimentary evolution, it is confirmed that the Tanjianshan Group, formed in early-late Ordovician and dated at 496~440Ma, is not simultaneous with the ultrahigh pressure metamorphism that occurred in 545~485Ma. The new volcanic-sedimentary evolutionary sequence of Tanjianshan Group suggests that two tectonic opening-closing cycles may have taken place in the period from Newproterozoic to Early Paleozoic. |
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| Keywords: | northern margin of the Qaidam basin Tanjianshan Group age tectonic evolution |
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