Metamorphic constraints on the thermal evolution of the central Himalayan Orogen
Metamorphic constraints on the thermal evolution of the central Himalayan Orogen
复制标题
喜马拉雅造山带中部变质作用对热演化的制约
DOI：
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发表时间：
1988
期刊：
影响因子：
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通讯作者：
D. S. Silverberg
中科院分区：
文献类型：
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作者：
K. Hodges;M. Hubbard;D. S. Silverberg
最近的研究，结合传统的热压法的泥质矿物组合与热力学模拟石榴石分带揭示了复杂的第三纪P-T路径的大喜马拉雅变质序列在喜马拉雅山脉中部。鉴于我们目前对喜马拉雅构造演化的理解，这些数据提供了对造山作用期间构造和热过程之间关系的见解。在本文中，我们提出了一个解释模型的构造演化的大喜马拉雅山脉的中部。这一模式包括：（1）中始新世-早渐新世印度-亚洲碰撞早期埋藏深度超过30 km，（2）早-晚渐新世抬升冷却，（3）晚渐新世加热和重新埋藏与深熔作用和浅色花岗岩侵入作用的早期同步;（4）渐新世末-中新世中期的快速隆升和持续的浅色花岗岩产出，与构造较低的主中央逆冲断层的斜坡和构造较高的低-角分离系统;中新世中期-
Recent studies that integrate conventional thermobarometry of pelitic mineral assemblages with thermodynamic modeling of garnet zoning reveal complex Tertiary P -T paths for the Greater Himalayan metamorphic sequence in the central Himalaya. Viewed in light of our current understanding of the structural evolution of the Himalaya, these data provide insights into the relations between tectonic and thermal processes during orogenesis. In this paper, we present an interpretive model for tectonothermal evolution of the Greater Himalaya in the central part of the range. This model involves: (1) middle Eocene—early Oligocene burial to depths of more than 30 km during the early stages of collision between India and Asia; (2) early—late Oligocene uplift and cooling; (3) late Oligocene heating and renewed burial synchronous with the early stages of anatectic melting and leucogranite plutonism; (4) latest Oligocene-middle Miocene rapid uplift and continued leucogranite production associated with ramping on the structurally lower Main Central Thrust and tectonic denudation on structurally higher low-angle detachment systems; and (5) middle Miocene—Recent rapid cooling during the final stages of uplift to the surface.