甘肃玉门地区石炭纪地层研究的新发现  

New Discovery of Carboniferous Stratigraphic Study in Yumen Area of Gansu Province

作　　者：李艺斌[1] 陈竹[2] 刘东[3] 

机构地区：[1]长江大学地球科学学院,湖北荆州434023 [2]天津工程职业技术学院,天津300280 [3]西南油气田分公司重庆气矿,重庆400021

出　　处：《石油天然气学报》2005年第1期40-42,共3页Journal of Oil and Gas Technology

摘　　要：甘肃玉门地区石炭系仅发育上石炭统,是一套不含煤层的海陆交互相沉积,包括羊虎沟组和太原组,与下伏奥陶系和上覆新近系均呈角度不整合接触。在该区石炭系首次划分出羊虎沟组,并新发现了蜓类和牙形类化石。这套地层牙形类化石较为丰富,可构成Idiognathodusdelicates-I·primulus组合带和Streptognathuduselegantulus带。根据化石组合特征确定了这套地层的具体层位和时代。In carbonifierous system of Yumen area of Gansu Province, the upper Carboniferous series is developed, which is a set of marine-terrestrial alternating deposits without coambed, including Yanghugon Formation and Taiyuau Formation, showing a unconformable contact with underlying Ordovician and overlying Neogene. Yanghugon Formation is first identified and the fossils of fusulinides and conodonts are newly discovered in the studied area. The conodont fossils are richer, by which Idiognathodus delicates_I. Primulus assemblage zone and the Streptognathudus elegantulus zone are made up. Based on the characters of the fossil assemblage, the particular stratigraphic positions and ages are determined.

关 键 词：甘肃玉门 上石炭统 羊虎沟组 太原组 牙形类 

分 类 号：P534.45[天文地球—古生物学与地层学]