| 藏南冈底斯地体中段南缘构造演化 |
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| 引用本文：孟元库,许志琴.2017.藏南冈底斯地体中段南缘构造演化[J].地球学报,38(s1):15-18. |
| DOI：10.3975/cagsb.2017.s1.05 |
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| 基金项目:中国地质调查局项目(编号: 12120115026801); 国家自然科学基金创新研究群体项目(编号: 40921001) |
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| 中文摘要:冈底斯岩浆带位于拉萨地体南缘, 是新特提斯洋盆演化和印度-亚洲陆陆碰撞的岩浆产物, 对冈底斯岩浆带的研究方兴未艾, 但一些基本问题仍然存在着激烈的争论(比如晚三叠世到早—中侏罗世新特提斯洋演化的极性, 冈底斯岩浆带中大型韧性剪切带形成的时代、动力学机制以及冈底斯中段新生代的隆升-剥蚀模式等等), 这都直接影响了对新特提斯域构造和青藏高原形成演化的理解, 以及对冈底斯构造成矿带的资源评价。 |
| 中文关键词:冈底斯 花岗岩类 韧性剪切带 裂变径迹 构造演化 |
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| Tectonic Evolution of the Southern Region in the Middle Gangdese Batholith, Southern Tibet |
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| Abstract:The Gangdese magmatic belt, located in southern margin of the Lhasa terrane, was related to the Neo-Tethys oceanic evolution and Asian-Indian colli-sion. Therefore, the Gangdese magmatic belt is a still research focus of the Tibetan geosciences. However, some basic and essential issues have been under dis-cussion and debated, such as the Triassic–Jurassic evolutionary characteristics or nature of the Neo-Tethys oceanic crust, formation ages and dy-namic mechanisms of ductile shear zones and denuda-tion and uplift models of the Gangdese batholith in southern Tibet. These issues cloud the understanding and tectonic framework of the Tibetan plateau and the Neo-Tethys oceanic evolution, especially in assessing accurately ore deposits and met-allogenic belt for the whole Gangdese magmatic belt. |
| keywords:Gangdese granitoids ductile shear zone fission track tectonic evolution |
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