新疆准噶尔石钱滩组的生物群沉积环境及生物区系特征  

ON FAUNAS,SEDIMENTAL ENVIRONMENT ND PALAEOBIOGEOGRAPHY OF SHIQIANTAN FORMATION,JUNGGAR,XINJIANG

作　　者：王治平[1] 冯庆来[1] 

机构地区：[1]中国地质大学地质系

出　　处：《地球科学（中国地质大学学报）》1992年第3期281-288,共8页Earth Science-Journal of China University of Geosciences

摘　　要：石钱滩组呈NW-SE向带状分布于东准噶尔克拉麦里山南麓,由海相碎屑岩、生物碎屑灰岩和泥岩组成。生物化石丰富,主要有珊瑚、双壳类、腕足类、有孔虫及介形类等。据多门类化石资料分析认为,石钱滩组的中、下部属中石炭统,上部应为上石炭统。其沉积环境属于暖温带气候条件下、板块边缘构造活动区、海水不断加深的开阔滨浅海。生物区系特征与乌拉尔、新地岛相近,属北方大区。Shiqiantan Formation is mainly composed of marine clastic rocks interbedded with limestone containing numerous fossils. It spreads in NW-SE direction along the piedmont of the Kalameli Mt. in eastern Junggar, Xinjiang. The strata are formed in the coastal area and shallow open sea which kept deepening during this period. It was structural region of the plate margin, and was situated in the warm temperate zone. The fossils are diversified and abundant, they are forminifers (including fusulinids), corals, brachiopods, bivalves, gastropods, porifers, bryozoans, ostracods, crinoids, trilobites and conodonts. Synthetic information about the age of the formation can be provided by studying the fossils, that is, the middle and lower parts of which are Middle Carboniferous, and the upper part may belong to Upper Carboniferous. The features of palaeobiogeography of Shiqiantan Formation are close to Ural and Novaya Zemlya and should be included in Boreal Realm. They are apparently different from the South and North China and East Europe, all belonging to the Tethys Realm.

关 键 词：生物群 古地理 新疆 沉积环境 

分 类 号：P531[天文地球—古生物学与地层学]