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吉林地质调查院在开展西藏自治区1∶25万多巴区幅区域地质调查时,在木纠错西的申扎县多布日一带发现一套陆相—海陆交互相—滨浅海相地层,并采集到了珊瑚化石、海参化石、植物化石、介形类化石、腹足化石、藻类化石和孢粉化石等。根据这些古生物化石确定该套地层为晚三叠世沉积。从而首次证明了冈底斯—腾冲区永珠蛇绿岩带以南存在晚三叠世地层。这一发现为我国三叠系的划分对比提供了重要的依据,并为古特提斯海的演化历史,古地理轮廓的确定以及青藏高原的形成演变历史提供了新的资料。
Jilin Geological Survey carried out a geological survey of 1: 225,000-bar area in the Tibet Autonomous Region when discovering a facies-sea-land interaction facies-coastal shallow marine facies in the Dobuji area, Xinsha County, Collected fossils, sea cucumber fossils, plant fossils, Ostoid fossils, gastropod fossils, algae fossils and spore fossils. Based on these paleontological fossils, the formation was identified as Late Triassic sediments. As a result, the Late Triassic strata existed south of the Yong Zhu ophiolite belt in the Gangdese-Tengchong area for the first time. This finding provides an important basis for the division and comparison of Triassic in China and provides new information for the evolution of the Guteeth Sea, the determination of paleogeographic contours and the history of the formation and evolution of the Qinghai-Tibet Plateau.