Metamorphic evolution, 40Ar-39Ar chronology and tectonic model for the Neelum valley, Azad Kashmir, NE Pakistan
Metamorphic evolution, 40Ar-39Ar chronology and tectonic model for the Neelum valley, Azad Kashmir, NE Pakistan
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巴基斯坦东北部阿扎德克什米尔 Neelum 山谷的变质演化、40Ar-39Ar 年代学和构造模型
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发表时间：
2000
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通讯作者：
J. Verkaeren
中科院分区：
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作者：
D. Fontan;M. Schouppe;C. Hunziker;G. Martinotti;J. Verkaeren
本文描述了巴基斯坦东北部阿扎德克什米尔地区尼拉姆河谷北方部分地区的地质、构造变质史和年代学。本区的变质结晶岩属于小喜马拉雅结晶杂岩和高喜马拉雅结晶杂岩。约1500平方公里的地质测绘证实了三个主要构造单元的存在，其特征是相似的岩石地层序列，但具有不同的构造变质历史。这些构造单元是否属于小喜马拉雅或高喜马拉雅结晶取决于主中央冲断层的位置，仍然存在争议。一个构造模型，涉及同收敛折返，建议是符合新的岩相学和年代学数据，并与主中央逆冲断层的修订解释。
Abstract This paper describes the geology, tectonometamorphic history and geochronology of part of the northern flank of the Neelum valley in Azad Kashmir, NE Pakistan. Metamorphic crystalline rocks in this area belong to the Lesser and Higher Himalayan Crystalline complexes. Geological mapping of about 1500 km2 confirms the presence of three main tectonic units characterized by similar lithostratigraphic sequences but with different tectonometamorphic histories. Whether these tectonic units belong to the Lesser or Higher Himalayan Crystallines depends on the, still controversial, position of the Main Central Thrust. A tectonic model, involving syn-convergent exhumation, is suggested that is consistent with new petrographic and geochronological data, and with a revised interpretation of the Main Central Thrust.