Tectonics of the Chinese Mainland with special reference to the Qinling Tectonic Zone and the Vangtzi Platform.

中国大陆大地构造，特别是秦岭构造带和璜子台地。

• 批准号: 63043031
• 负责人: MIZUTANI Shinjiro
• 金额: $ 1.22万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Overseas Scientific Research
• 财政年份: 1986
• 资助国家: 日本
• 起止时间: 1986 至 1988
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-63043031/
• 关键词: China; Qinling Tectonic Zone; Yangzi Platform; Geologic Structure; Terrane Analysis; Radiolaria; 那丹哈達テレーン

The main results of this Monbusho International Scientific Research Program are as follows:1. The Nadanhada Range in Northeast China is composed of upper Paleozoic limestone, greenstone, middle to late Triassic bedded chert, and middle Jurassic siliceous shale; these rocks are enclosed in post-middle Jurassic clastic rocks. The lithologic association, ages, radiolarian assemblgaes and geologic structure of the Nadanhada Range are very similar to those of the Tamba-Mino-Ashio terrane in Southwest Japan. This indicates that the Nadanhada Range is the northern extension of the Tamba-Mino-Ashio terrane.2. Northeast China and Sikhote-Alin regions are subdivided into some tectonostratigraphic terranes such as the Khanka terrane, the Nadanhada-Western Sikhote-Alin terrane, the Eastern Sikhote-Alin terrane and the Tetyukhe terrane.3. The terranes listed above were accreted along the eastern margin of the Asian continent in Jurassic to Cretaceous time. At the time of accretion, East Asia is made up of the Yangtzi and Sino-Korean terranes. Although the timing of collision in the Qinling suture zone between the Yangtzi and Sino-Korean terranes are highly contro-versial, we believe that the collision began in Triassic time and completed in the Jurassic on the basis of the data obtained by this research program, for example, the Indosinian granites distributed in the Qinling suture zone, and litho- and bio-facies contrasts between the Yangtzi and Sino-Korean terranes during Paleozoic time.4. Recent deformation in the Qinling suture zone seems to result from the strike-slip movement along the faults parallel to the suture zone and along the Tan-Lu fault zone. In larger scale, these activities are explained as the results of the collision of India and Eurasia.

本次文部省国际科学研究计划的主要成果如下：1.中国东北的那丹哈达山脉由上古生界灰岩、绿岩、中晚三叠世层状硅质岩和中侏罗世硅质页岩组成，这些岩石被包裹在中侏罗世后的碎屑岩中。Nadanhada岭的岩性组合、年龄、放射虫组合和地质构造与日本西南部的Tamba-Mino-Ashio岭非常相似。这表明Nadanhada山脉是Tamba-Mino-Ashio山脉的北方延伸。中国东北和锡霍特-阿林地区可划分为一些构造地层单元，如兴凯-阿林、那达慕-西锡霍特-阿林、东锡霍特-阿林和铁秋赫-阿林。这些岩石沿着亚洲大陆东缘增生于侏罗纪-白垩纪。在增生时期，东亚是由长江和中朝两条河流组成的。虽然扬子-中朝板块在秦岭缝合带的碰撞时间存在很大争议，但根据本研究所获得的资料，如分布在秦岭缝合带的印支期花岗岩，古生代长江三角洲与中朝三角洲的岩相、生物相对比.秦岭缝合带的现代变形可能是沿着平行于缝合带的断裂和沿着郯庐断裂带的走滑运动的结果。在更大的尺度上，这些活动被解释为印度和欧亚大陆碰撞的结果。