| 中昆仑北部古生代构造岩浆作用及其演化 |
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| 关键词:tectonomagmatism tectonic evolution Paleozoic northern Central Kunlun |
| 基金项目:国家305项目,中国科学院院长基金 |
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| 摘要: |
| Paleozoic Tectonomagmatism in the Northern Central Kunlun Mountains and Its Evolution |
| The authors have undertaken researches on the Paleozoic tectostratigraphic framework, tectonic deformation and styles, regional distribution and geochemistry of Paleozoic granite and volcanic rock geochemistry of the Qimantag Group and its regional correlation in the northern Central Kunlun Mountains where limited the geological researches were performed. It is considered that the Qimantag Group is of Cambrian-Early Silurian age and that a continental rift or an initial ocean basin rather than a mature ocean possibly existed in the Qimantag area of the northern Central-Kunlun area during the Early Paleozoic. The Qimantag initial ocean closed along the Yaziquan_Qimantag fault and the passive continental margin in the northern part of the Qimantag became the active continental margin during the late Early Paleozoic.The simple shear slide occurred at the north and south flanks of the Qiumianleike granite dome during the earty Late Paleozoic. During the late Late Paleozoic,the Paleo_Tethys Ocean was subducted and collided along the Central Kunlun,and then there appearred the active continental margin in the area north of the Central Kunlun fault. Thus the ocean closed. |
| WANG Yue-jun,SHEN Yuan-chao,LIN Ke,XIE Hong-yuan.1999.Paleozoic Tectonomagmatism in the Northern Central Kunlun Mountains and Its Evolution[J].Acta Geoscientica Sinica,20(1):1-9. |
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