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| 柴北缘地区印支期构造背景、岩浆活动及稀有金属成矿作用 |
| Indosinian Tectonic Setting,Magmatism and Rare Metal Mineralization in the Northern Marginal Area of Qaidam Basin |
| 投稿时间：2020-08-18 |
| DOI：10.12119/j.yhyj.202004001 |
| 中文关键词: 柴北缘 印支期岩浆岩 稀有金属 成矿作用 成矿类型 |
| 英文关键词:Northern margin of Qaidam basin Indosinian magmatic rocks Rare metals Mineralization Metallogenic type |
| 基金项目:青海省科技计划项目(2018-SF-109)；青藏高原第二次科学考察项目(2019QZKK0702)；中国地质调查局矿产地质志(DD20160346)；青海学者专项资金(QHS201802) DOI:10.12119/j.yhyj.202004001 柴北缘地区印支期构造背景、岩浆活动及稀有金属成矿作用李善平,任华,王春涛,李五福,王进寿,王建军,金婷婷,孙洪亮 (青海省地质调查院青海省青藏高原北部地质过程与矿产资源重点实验室,青海 西宁 810012) |
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| 中文摘要: |
| 柴北缘地区大地构造位置处于古亚洲构造域与特提斯构造域结合部位的多旋回弧盆造山系；岩浆活动强烈,印支期岩浆岩主要分布于新青界山、察汗诺、哈莉哈德山南以及橡皮山等地区,岩浆岩以中酸性岩为主,花岗岩类分异程度高,与稀有金属矿产关系密切,形成于印支期柴北缘活动大陆边缘俯冲碰撞环境。柴北缘地区伟晶岩脉断续出露200余公里,伟晶岩具有集中性、分片性产出特征,其成矿作用与岩浆活动密切相关；印支期是伟晶岩型稀有金属成矿重要时期；厘定出稀有金属主要成矿类型为伟晶岩型、花岗岩型。 |
| 英文摘要: |
| The tectonic position of the northern marginal area of Qaidam Basin is located in the multi-cycle arc basin orogenic system at the junction of ancient Asian tectonic domain and Tethys tectonic domain.Magmatic activities in the study area were intense in the geological time.The Indosinian magmatic rocks are mainly distributed in Xinqingjie Mountain,Chahannuo Mountain,south of Hallihad Mountain and Rubber Mountain,etc.The magmatic rocks are mainly medium-acid rocks,and the granites are highly differentiated.Granites are closely related to rare metal minerals.Granites were formed in the subduction collision environment of the active continental margin on the northern margin of the Indosinian Qaidam Basin.The pegmatite veins in the northern margin of Qaidam Basin are intermittently exposed for more than 200 km.The pegmatite is characterized by concentrated and fragmented production,and the mineralization of pegmatite is closely related to magmatism.Indosinian period in the northern margin of Qaidam Basin is an important period for pegmatite rare metal mineralization.Based on the above analysis,we have determined that the main metallogenic types of rare metals are pegmatite type and granite type in the northern margin of Qaidam Basin. |
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