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在单向限制的粘土(塑造模型用的代用粘土)块上进行平面压入实验,有助于我们对东亚大陆块内部有限变形和走向滑动断层演化的认识。几条大型左行走向滑动断层的活动是相继的,一个时期以一条断层活动为主。实验表明在碰撞期之初20~30百万年间,印度插进亚洲并旋转约25°,与此同时印度支那沿着左行红河断层东南挤出约800公里。这次活动可能是中国南海在晚中新世前张开的原因。然后,挤出构造向北迁移,阿尔金山断层成为第二条大型左行断层,同时中国南部则向东运动达数百公里。在此过程中,印度支那继续顺时针旋转达40°,但是红河和南部其它走向滑动断层的运动方向则相反。墨吉盆地和安达曼海的张开(直到现在)看来也是这种挤出运动的简单结果。中国东北和云南的近期裂谷可以认为是中国南海和安达曼海的早期状况。另外一些第三纪构造,诸如泰国湾的沉积盆地,根据我们实验取得的论点也可解释为碰撞的效应。这些实验还说明:另一个大型左行走向滑动断层和裂谷系将越过天山、蒙古和贝加尔扩展至鄂霍次克海。
The plane press-in experiment on unidirectionally constrained clay (substitute clay for model building) helps us to understand the finite deformation and strike-slip evolution within the East Asian continent. A few large-scale left-sloping activities are carried out one after the other, and one period is dominated by a fault. Experiments show that at the beginning of the collision period between 20-30 million years, India plunged into Asia and rotated about 25 °, while Indochina squeezed about 800 km southeast along the Zuohanghonghe fault. This event may be the reason why the South China Sea opened before the late Miocene. Then, the extrusion structure migrated to the north, the Altun fault became the second large left-hand fault, while the southern part of China moved eastward for hundreds of kilometers. In the process, Indo-China continued to rotate clockwise by 40 °, but the opposite directions of the red-river and southern strike-slip faults were reversed. The opening of the Moai Basin and the Andaman Sea (until now) appears to be a simple result of this extrusion. Recent rifts in northeastern China and Yunnan can be thought of as the early state of the South China Sea and the Andaman Sea. Other Tertiary tectonics, such as the sedimentary basins in the Gulf of Thailand, can also be interpreted as the effects of collisions on the basis of our experiments. These experiments also show that another large left-lateral strike-slip and rift will extend over the Tianshan Mountains, Mongolia and Baikal to the Sea of Okhotsk.