四川雅安-丹棱地区蓬莱镇组地层特征及沉积相分析

详细信息

Stratigraphic and sedimentary facies analysis of the Penglaizhen Formation in the Ya'an-Danling region, Sichuan

Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, Sichuan, China

摘要: 本文详细描述了丹陵县石桥乡唐湾蓬莱镇组实测地层剖面,讨论了雅安-丹陵地区蓬莱镇组的岩石地层及岩相组合特征,分析了该组岩性-岩相的横向变化规律。认为该区蓬莱镇组由湖泊沉积相及湖泊三角洲沉积相组成,在区内蓬莱镇组地层中建立了一个轮藻即Porochara maedleri-Aclistochara yunnanensis组合带,将蓬莱镇组归属于上侏罗统。
- 四川丹棱 /
- 蓬莱镇组 /
- 地层划分 /
- 组合带 /
- 沉积相
Abstract: The present paper gives a detailed description of the measured stratigraphic sections of the Penglaizhen Formation in the Ya'an-Danling region, Sichuan, with the emphasis on the lithostratigraphy and sedimentary facies associations and horizontal variations in lithology and sedimentary facies. The Penglaizhen Formation is made up of the lake facies and lake-delta facies, and two long-term and five medium-term base-level cyclic sequences in which individual sequences and systems tracts are elucidated. The establishment of the assemblage zone Porochara maedleri-Aclistochara yunnanensis in the strata of the Penglaizhen Formation indicates a Late Jurassic age for the deposition of the Penglaizhen Formation.
- Danling in Sichuan /
- Penglaizhen Formation /
- stratigraphic division /
- assemblage zone /
- sedimentary facies