摘要
依据沉积建造、构造岩石组合、变形、变质、古生物分区、地壳结构、地球物理、地球化学等特征重新划分了东天山的板块构造格局，并对区内５个二级板块单元的基本特征进行了对比总结。康古尔塔格—喀尔力克岛弧系发育泥盆—石炭系岛弧拉斑玄武岩—安山岩，为活动大陆边缘产物；阿奇山—雅满苏岛弧系发育石炭系，４个火山—沉积旋回表明其为典型的活动边缘，无序地层苦水组为海沟区浊积岩；北山可二分，北部与中天山可对比，为早古生代岛弧，南部可与南天山对比，为晚古生代弧后盆地。康古尔塔格—黄山深断裂为准噶尔板块与塔里木板块的分界线，沿断裂发现有巨型韧性剪切带、混杂岩、海沟杂砂岩、大洋岩残片、无序拼合混杂带、碰撞花岗岩等，表明康—黄断裂为南北两板块的俯冲—碰撞带。
By study of sedimentary formation,tectonic rock association, deformation, metamorphism, paleontologic division, crustal structure, geophysical signature and geochemistry, the East Tianshan area is subdivided into two Ⅰ-grade units includipg Kazakhstan-Junggar plate and Tarim plate, and five Ⅱ-grade units.Kangguertage-Huangshan deep fracture is the subduction-collision zone of two plates. The giant ductileshear zone, melange, trench graywache, remnant oceanic crust, disordered strata, mixed belt, collisiongranite are discovered along the fracture in the area. Based on correlation of the geology, geophysical and geochemical features of the five Ⅱ-grade units, Kangguertage-harlik island arc system and Aqishan-Yamansu island arc system belong to the active continental margins.
出处
《新疆地质》
CAS
CSCD
1996年第3期221-227,共7页
Xinjiang Geology
基金
国家"305"项目
关键词
东天山
板块构造
构造单元
岛弧系
深断裂
East Tianshan plate tectonics tectonic unit island arc system deep fracture
