海相火山沉积盆地层序地层研究:以新疆阿舍勒、冲乎尔地区泥盆系地层为例

SEQUENCE STRATIGRAPHY OF MARINE VOLCANO SEDIMENTARY BASINS: AN EXAMPLE FROM THE DEVONIAN STRATA IN THE ASHELE CHONGHUR REGION,XINJIANG

层序地层研究业已成为沉积地质学研究领域的热点。前人主要集中研究陆源碎屑岩和碳酸盐岩条件的层序发育特点，而较少涉猎海相火山沉积盆地的层序地层探讨。新疆阿舍勒、冲乎尔地区泥盆纪火山沉积盆地是以火山岩为主，伴有陆源和内源沉积物的堆积场所，对其地层进行露头层序地层研究后发现，其沉积层序形成的主控因素、发育特点以及层序界线的识别标志均有其独特之处：不仅与海平面变化相关，而且与构造作用。

The present paper focuses on seqence stratigraphy of marine volcano sedimentary basins in the Ashele Chonghur region,Xinjiang.These Devonian volcano sedimentary basins are occupied dominantly by the volcanic rocks in association with terrigenous and intrabasinal sediments.The authors suggest,on the basis of the studies of outcrop sequence stratigraphy,that the main controlling factors and characteristics of the sedimentary sequences and the criteria for the recognization of the sequence boundaries are quite different in the study area from those elsewhere.The formation of the sedimentary sequences herein is closely bound up not only with sea level changes but also with tectonic activity and volcanic eruptive cycles.