论文部分内容阅读
几年来的国际地质会议上,各国与会者悉知有关各种板块构造演化模式。例如在比利时召开的第13届国际地质会议上,瑞士科学家Emile Argand提出:非洲板块仰冲于欧洲板块从而造成阿尔卑斯链;不断的冲力将其推离非洲大陆从而形成地中海裂谷。他认为亚洲板块碰撞时像一船首压于印度板块之上,后者向下俯冲使西马拉雅山和西藏原始抬升。在1926年马德里召开的第11届会议上,德国科学家Steinmann提出论点:与枕状熔岩和放射虫燧石伴生的蛇纹岩化橄榄岩可能是深水成因物,他称这种岩石为共生蛇绿岩,这种岩石将在板块构造模式研究中起重要作用。这些放射虫和枕状熔岩可能形成于地槽形成早期,而超基性岩则形成于此后。
In the past few years, at the International Geological Conference, participants from various countries became familiar with the tectonic evolution patterns of various plates. At the 13th International Geological Conference in Belgium, for example, Swiss scientist Emile Argand proposed that the African plate bears up the European plate to create the Alps chain; its continuous momentum will push it off the African continent to form the Mediterranean rift. He believes that when a collision between Asian plates collided with a ship’s first pressure above the Indian plate, the latter diveped the original uplift of the Himalayas and Tibet. At the 11th Conference in Madrid in 1926, the German scientist Steinmann put forward the argument that serpentinized peridotites, associated with pillow-shaped lava and radiolarian chert, may have been a deepwater formation that he described as symbiotic ophiolite, This rock will play an important role in the study of plate tectonic model. These radiolarians and pillow lava may have formed in the early stage of geosyncline formation, while ultramafic rocks formed afterwards.