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本文以青藏简原地质、地球物理资料为基础,模拟了印度河-雅鲁藏布江缝合线至昆中断裂间高原自60Ma以来热异常形成、演化及珠动应力场分布格局。研究表明,青藏高原中北部(安多以北)在中新世以前以浅部地壳逆冲、叠覆、隆升为特征;而在中新世以后,中下地壳及岩石田底部高热异常的形成与演化及差异应力场格局的调整与变异导致高原整体快速隆升,并相应控制浅部构造样式、Moho面的错断、叠覆及岩浆岩时空分布;目前该地区基本维持20Ma时的应力场和热异常格局,但非稳态岩石田上的地壳正潜伏着发生后造山伸展作用的动力学机因,而安多以南现阶段的高热流特征则可能主要受制于断裂摩擦生热。
Based on the Qinghai-Tibet plain geophysical and geophysical data, this paper simulated the thermal anomaly formation, evolution and the dynamic stress field distribution pattern of the Pearl River Delta since the 60-Ma plateau between the Indus-Brahmaputra suture and the Kunzhong fault plateau. The study shows that the central and northern parts of the Qinghai-Tibet Plateau (north of Andhto) are characterized by shallow crustal thrusting, overlying and uplifting before the Miocene. In the middle and lower crust and the bottom of the rocky field, after the Miocene, the formation of high thermal anomalies And the evolution and variation of the stress field pattern lead to the rapid uplifting of the whole plateau and control the shallow structural style, the fault and overlap of the Moho surface and the temporal and spatial distribution of magmatic rocks. At present, the stress field at 20 Ma And the thermal anomalous pattern. However, the crust in the non-steady rock field is lurking in the kinetic cause of the post-orogenic extension. However, the current high-heat flow characteristics at the south of Andhto-Antropur may be mainly controlled by the fracture friction heat generation.