四川彭州市白鹿乡地区上三叠统须家河组特征

The Upper Triassic Xujiahe Formation in the Bailu district,Pengzhou,Sichuan

摘要: 彭州白鹿乡地区须家河组含煤地层大片分布,本文通过该区洞子沟比较完好的须家河组地层剖面的研究,对该区及近邻地区须家河组的分布、岩石组合特征、横向变化进行讨论,以便对须家河组的形成环境及含煤特征有更深入的认识,更有助干该区地层层序的建立。
- 须家河组 /
- 岩石组合特征 /
- 彭州
Abstract: The middle and upper members of the Xujiahe Formation have a thickness of more than 1274 m in the Bailu district,Pengzhou,Sichuan.The basal strata are geared to the coral part of the Bailu Bridge anticline,and the uppermost strata overlain with disconformi-ty by the Qianfoya Formation.The strata in the Xujiahe Formation may be ascribed,ac-cording to rock associations and geomorphological features,to the second,third and fourth members,where the coal-bearing strata of the Upper Triassic Xujiahe Formation crop.out over a wide area.The present paper deals with the distribution of the Xujiahe Formation in this region and adjacent areas,rock associations and horizontal variations,with the empha-sis on the well-developed Dongzigou section,thus improving our knowledge of the stratigraphic sequences,sedimentary environments and coal-bearing horizons in the Xujiahe Formation.
- Xujiahe Formation /
- rock association /
- Pengzhou