摘要
磨拉石可定义为以碎屑沉积为特征的、在隆起的山体前缘快速堆积为沉积组合.依其动力学背景,可分为三种类型:1.离散(拉张)型,与陆壳的破裂相关;2.聚敛(挤压)型,与岩石圈板块碰撞相关;3.转换(剪切)型,与受走滑断层控制的拉裂盆地有关。上述三类磨拉石与威尔逊造山旋回模式之间有着成因联系,表现为:1.威尔逊旋回的不同阶段形成不同类型的磨拉石;2.由于板块的动力学和运动学差别,不同的磨拉石有着各自的传殊性;3.由于地壳中元素的迁移和富集,导致不同的磨拉石中形成不同的矿产.
Molasse is a sedimentary assemblage which is characteristic of clastic sediments and rapid accumulation on the front of mountain mass. There are three types according to their dynamic backgrounds. divergence(stretching ) type, related to the crustal cracking, 2.convergence ( compressional ) type, related to the collision of lithospheric plates; 3. transformational shearing ) type, related to stretch-rifting basin controlled by strike-slip faults. The three types of molasse are genetically related to the models of Welson moun-tain building cycles, on the account of: 1.different types of molasse formed in different stages of Welson cycles; 2.each type of molasse has its own peculiarities, due to the differences in dynamics and kinematics of platesj 3.different mineral products formed in different molasses because of the dis-placement and enrichment of the elements in the crust.
出处
《石油实验地质》
CAS
CSCD
北大核心
1989年第4期314-319,共6页
Petroleum Geology & Experiment
