| 祁连南缘嗷唠山花岗岩SHRIMP锆石年龄及其地质意义 |
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| 引用本文： | 吴才来 TrevorIRELAND 等.祁连南缘嗷唠山花岗岩SHRIMP锆石年龄及其地质意义[J].岩石学报,2001,17(2):215-221. |
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| 作者姓名： | 吴才来 TrevorIRELAND |
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| 作者单位： | 1. 中国地质科学院地质研究所,100037,北京
2. 斯坦福大学,美国 |
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| 基金项目： | 本文得到国家重点自然科学基金项目(49732070)、国家973项目(G1998040800)的资助. |
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| 摘 要： | 祁连南缘嗷唠山花岗岩锆石的SHRIMP年龄变化于445－496Ma之间，平均为473Ma，属早奥问世。该花岗岩的岩石地球化学特征类似于I型花岗岩，有关构造环境判别图解得出，该花岗岩类似于岛弧或活动陆缘环境。结合区域地质特征分析，该花岗岩是祁连南缘早石生代超高压变质带的一部分，它的形成与超高压变质带的形成密切相关。
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| 关 键 词： | 锆石 SHRIMP年龄 花岗岩 超高压变质带 构造环境 早奥陶世 地球化学特征 |
| 修稿时间： | 2000年7月24日 |
Zircon SHRIMP ages of Aolaoshan granite from the south margin of Qilianshan and its geological significance. |
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| WU CaiLai,YANG JingSui,Trevor IRELAND,Joe WOODEN,LI HaiBing,WAN YuSheng and SHI RenDeng.Zircon SHRIMP ages of Aolaoshan granite from the south margin of Qilianshan and its geological significance.[J].Acta Petrologica Sinica,2001,17(2):215-221. |
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| Authors: | WU CaiLai YANG JingSui Trevor IRELAND Joe WOODEN LI HaiBing WAN YuSheng and SHI RenDeng |
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| Institution: | WU CaiLai,YANG JingSui,Trevor IRELAND,Joe WOODEN,LI HaiBing,WAN YuSheng and SHI RenDeng . Institute of Geology,Chinese Academy of Geological Sciences,Beijing,China . Stanford University,USA |
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| Abstract: | Zircon SHRIMP ages of Aolaoshan granite from the south margin of Qilian range from 445 Ma to 496 Ma, with an averaged age of 473 Ma, belonging to the early Ordovician. Geochemically, the granites are similar to I type granites. Tectonically, the granite was formed in island arc based on some discriminated diagrams. Combined with regional geology, authors suggest that the granite was one part of the ultra high pressure metamorphic belt of the south margin of Qilian and both have a close relationship. |
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| Keywords: | Zircon SHRIMP age Granite Ultra high pressure metamorphic belt South margin of Qilian |
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