新疆阿舍勒、冲乎尔地区泥盆纪岩相古地理研究

SEDIMENTARY FACIES AND PALAEOGEOGRAPHY OF THE DEVONIAN STRATA IN THE ASHELE AND CHONGHUR REGIONS,XINJIANG

关键词:  泥盆纪  相序列  岩相古地理  成因相  环境相

Key words:  Devonian  facies sequence  sedimentary facies and palaeogeography  genetic facies  environmental facies

摘要:

新疆阿舍勒、冲乎尔地区泥盆纪地层以火山岩为主,伴有陆源碎屑岩和内源沉积岩。对其古地理面貌的恢复,只有采用特殊的研究思路才能实现。缘于此,本文采用成因相和环境相的研究思路,对该地区的岩相古地理面貌做了较为详细的研究和恢复,为如何在火山沉积盆地中进行古地理研究提供了思维方法和工作模式。

Abstract:

The volcanic rocks associated with the terrigenous elastic rocks and intrabasinal sedi-mentary rocks predominate in the Devonian strata in the Ashele and Chonghur regions, Xinjiang.According to the viewpoint of the genetic facies and environmental facies,five types of genetic facies and five types of environmental facies may be recognized for these regions.The former comprise volcanic facies,tempestite facies,volcanic gravity flow fa-cies,volcanic turbidity current facies and terrigenous elastic turbidity current facies,and the latter include abyssal-subabyssal facies,shallow shelf facies,littoral and shallow ma-rine facies,organic reef or bank facies and restricted platform facies.The detailed study of sedimentary facies and palaeogeography of the Devonian strata in the study area allow the mode of thinking and working models to be proposed for the study of sedimentary facies and palaeogeography in the volcanic-sedimentary basins.