摘要
中生代以来,中国西部和东部大地构造发展史和特征有所区别。西部为中新特提斯构造域(Meso-ceno-tethys tectonic domain),由于中新生代特提斯板块、印度板块与欧亚板块相互作用形成的,构造线取北西西、近东西至北北西向,与中新特提期海洋岸亚平行,与印度板块碰撞带近平行;东部是中新太平洋构造域(Meso-ceno-pacific tectonic domain),属于中新生代太平洋板块与欧並板块相互作用的结果,多数构造线为北北东向。
According to tectonic characteristics, basin-mountains systems formed in Meso-Cenozoic in East China and adjacent regions successively from west to east are the inland spreading basin system, the interbasin compression-rising mountains system, the volcanic arc-back spreading basin system, the volcanic arc compression-rising mountains system, the island arc-back spreading basin system, and the island arc compression-rising mountains system. Tectonic characteristics and formation mechanism of the basin-mountains systems are discussed in this paper. The Meso-Cenozoic Pacific ocean plate subducted under the Eurasian plate, which formed the stress of pullind the continent plate toward the ocean, disturbed the mantle, induced the secondary heat convection, and caused the successive partial spreading of the continent plate and the accretion and advance of the continent plate toward the ocean. Basins were formed in the spreading position and compression-rising mountains were formed between two spreading tectonic unit.This paper holds that the basin spreding depends upon two kinds of stress, i. e. 1, convection spreading stress, 2, diretive pulling stress, and the thinning process of the earth crust takes place in two manners i. e. 1, transmisson-spreading thinning, 2, pulling thinning. In the end, this paper briefly interprets the evolution process of the basin-mountains systems.
出处
《云南地质》
1989年第2期99-116,共18页
Yunnan Geology
