柴达木盆地北缘全吉地块构造演化特征

Geological Evolution Characteristics of Quanji Block in the Northern Margin of Qaidam Basin

摘要:

以柴达木盆地北缘全吉地块内的布依坦乌拉山为研究对象，探讨了布依坦乌拉山地区发育的多条不整合接触界线与区域构造地质事件的匹配，以及柴北缘发育的挤压、走滑和伸展3种构造样式。通过对布依坦乌拉山地区自元古代到新生代以来地质体构造环境演化的分析，结合区域地质事件、构造样式，认为全吉地块构造特征总体可划分为基底、盖层和断陷沉积3层构造模式。

Abstract:

Regarding Buyitanwulashan mountain in the northern margin of Quanji block in Qaidam basin as the research object, the matching of several unconformity boundaries developed in Buyitanwulashan area and regional tectonic geological events, and 3 tectonic styles, such as extrusion, strike slip and extension developed in norhtern Chaidamu basin have been studied. Through analysis on geological tectonic environment evolution of Buyitanwulashan area from Cenozoic to Proterozoic, combining with regional geological events and structural styles, it is thought that tectonic chatacteristics of Quanji block can be divided into basement, cover and faulted sedimentary in general.