地质通报2018，Vol.37Issue(1)：39-50,12.
西天山伊犁地区上、下石炭统接触关系的重新厘定及其构造意义——来自沉积学和岩相学的证据
The reevaluation of the contact relationship between Upper and Lower Carboniferous strata in Yili area of Western Tianshan Mountains and its tectonic significance: Evidence from sedimentology and petrography
摘要
Abstract
It is quite controversial whether there is a regional angular unconformity between the Upper and Lower Carboniferous strata in Western Tianshan Mountains,and such a situation restricts the division of the Late Paleozoic tectonic evolution.The Carbon-iferous strata are typical and intact in Yili.In this paper,the sedimentary and petrographic studies were carried out by redefining the contact relationship between the Upper and Lower Carboniferous strata in this area.The sedimentary characteristics show that these two strata are consistent,without conglomerate and weathering crust,and are characterized by mixed carbonate and volcanic debris. The Lower Carboniferous Akeshake Formation and Upper Carboniferous Yishijilike Formation may have no significant depositional interruption, and should be a continuous volcanic-sedimentary sequence. This study provides sedimentary evidence for the under-standing of the Carboniferous as a unified post-collision rift basin in the Yili area,Western Tianshan Mountains.关键词
接触关系/火山-沉积序列/石炭纪/后碰撞裂谷/西天山Key words
contact relationship/volcanic-sedimentary succession/Carboniferous/post-collision rifts/Western Tianshan Mountains分类
天文与地球科学引用本文复制引用
宋博,魏建设,白建科,牛亚卓,姜亭,许伟,冯杨伟..西天山伊犁地区上、下石炭统接触关系的重新厘定及其构造意义——来自沉积学和岩相学的证据[J].地质通报,2018,37(1):39-50,12.基金项目
中国地质调查局项目《银额盆地及周缘油气基础地质调查》(编号:DD20160172)、《银额盆地上古生界油气战略选区调查》(编号:DD20160200)和国家自然科学基金项目《北山地区石炭纪和二叠纪古地磁研究及其构造意义》(批准号:41402195)、《甘蒙北山黑鹰山地区晚石炭世沉积盆地性质分析》(批准号:41402097) （编号:DD20160172）
