塔里木盆地东北缘库鲁克塔格地区新元古代构造-沉积演化

发布时间：2018-07-03 15:08

本文选题：塔里木盆地 + 库鲁克塔格　；参考：《地学前缘》2017年01期

【摘要】：塔里木盆地库鲁克塔格地区保存了完整的新元古代南华纪—震旦纪地层,具有从早南华世火山岩-碎屑岩沉积,到晚南华世—早震旦世碎屑沉积,再到晚震旦世碎屑岩-碳酸盐岩沉积的演化过程。其中发育贝义西期、阿勒通沟期、特瑞艾肯期、汉格尔乔克期4期冰川沉积以及贝义西期、阿勒通沟期、扎摩克提期、水泉期4期火山作用。新元古代库鲁克塔格地区为大陆边缘裂谷,早南华世为强烈拉张断陷阶段,晚南华世—早震旦世为断陷向坳陷转变阶段,晚震旦世为稳定沉降阶段。以兴地断裂为界,南北两区具有不同的构造-沉积演化特征,早南华世南区为火山岩喷发中心,形成火山岩高地,北区为裂谷沉积中心,发育滨岸-陆棚沉积体系,整体具有南高北低的构造格局。晚南华世—早震旦世继承早南华世构造格局,南区以三角洲沉积为主,北区发育陆棚沉积体系。晚震旦世,南北两区沉积差异减弱,南区发育碳酸盐岩台地,北区为碎屑岩与碳酸盐岩混积陆棚。晚南华世—震旦纪南区结束火山活动,而北区发育多期次的火山岩。
[Abstract]:The whole Neoproterozoic Nanhua-Sinian strata have been preserved in the Kuruktag area of the Tarim Basin, with deposits ranging from early South China volcanic rock-clastic rocks to late Nanhua to early Sinian clastic deposits. Then to the late Sinian clastic rock-carbonate sedimentary evolution process. There are four periods of glacial deposition in the Beyesi stage, Altonghougou stage, Teriecan stage, Hangerjok period, and the fourth period of volcanism in the Beisei period, the Altonghougou stage, the Zamokti stage and the Shuiquan period. The Neoproterozoic Kuruktag area is a continental margin rift, the early Nanhua epoch is a strong extensional fault depression stage, the late Nanhuan-early Sinian period is a fault-depression transition stage, and the late Sinian period is a stable subsidence stage. With Xingdi fault as the boundary, the northern and southern regions have different characteristics of tectonic-sedimentary evolution. The southern part of the early Nanhua epoch is the center of volcanic eruption, forming volcanic rock highlands, while the northern part is the sedimentary center of rift valley, and the shore-shelf sedimentary system is developed. The whole has the structure pattern of south high and north low. The late Nanhua to early Sinian inherited the early Nanhua tectonic pattern, the delta deposits dominated in the southern region and the shelf sedimentary system was developed in the northern part of the region. In the late Sinian, the sedimentary difference between the two regions was weakened, carbonate platform was developed in the southern region, and the clastic rocks and carbonate rocks were mixed in the northern part of the region. The late South China-Sinian Southern region ended volcanic activity, while the North developed multi-stage volcanic rocks.
【作者单位】：北京大学地球与空间科学学院;北京大学石油与天然气研究中心;塔里木油田勘探开发研究院;
【基金】：中国地质调查局项目(1212011220760) 国家自然科学基金项目(41272137,41572117)
【分类号】：P534.3

【相似文献】