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青藏高原东南缘腾冲地块白垩纪岩浆作用研究现状
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Abstract:
腾冲地块处于青藏高原东南缘，地质构造复杂，岩浆活动频繁，变形变质作用强烈，特别是地块内的高黎贡构造带、叫鸡冠梁子矿床和泸水–龙陵–瑞丽俯冲增生杂岩保存了较丰富的白垩纪岩浆作用记录，为正确认识腾冲地块中生代的构造演化提供了理想窗口。本文综合目前有关腾冲地块白垩纪岩浆作用的重要文献资料，综述了腾冲地块白垩纪岩浆活动特征、岩石成因及其形成演化过程。整体看来，腾冲地块白垩纪岩浆作用的地球动力学机制主要与板块的俯冲作用有关，主要受控于中特提斯洋的演化。
Tengchong block is located in the southeastern margin of Qinghai-Tibet Plateau, with complex geological structure, frequent magmatic activities and strong deformation and metamorphism. In particular, the Gaoligong tectonic belt, Jiaojiguanliangzi deposit and Lushui-Longling-Ruili subduction accretion complex in the block have preserved numerous Cretaceous magmatism records, providing an ideal window for correctly understanding the Mesozoic tectonic evolution of Tengchong block. In this paper, the characteristics of Cretaceous magmatism, rock genesis and its formation and evolution process in Tengchong block are summarized by synthesizing the current important literature materials about Cretaceous magmatism in the block. On the whole, the geodynamic mechanism of Cretaceous magmatism in Tengchong block is mainly related to plate subduction and primarily controlled by the evolution of the Meso-Tethys Ocean.
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