新疆巴里坤下泥盆统大南湖组的厘定与生物地层分析  

Redefinition of Dananhu Formation and Research on Its Biostratigraphy in Balikun,Xinjiang

作　　者：初建朋[1,2] 孙荣涛[1] 亓辉 杨怀龙 赵文皓 Chu Jianpeng;Sun Rongtao;Qi Hui;Yang Huailong;Zhao Wenhao(School of Resources and Environmental Engineering,Shandong University of Technology,zibo,Shandong,255000,China;School of Earth Sciences and Resources,Chang'an University,Xi'an,Shaanxi,710054,China;Fourth Institute of Mineral Exploration of Gansu Province Bureau of Geology and Mineral Resources,Jiuquan,Gansu,735000,China)

机构地区：[1]山东理工大学资源与环境工程学院,山东淄博255000 [2]长安大学地球科学与资源学院,陕西西安710054 [3]甘肃省地质矿产勘查开发局第四地质矿产勘查院,甘肃酒泉735000

出　　处：《新疆地质》2019年第3期343-347,共5页Xinjiang Geology

基　　金：山东省自然科学基金面上项目ZR2016DM12

摘　　要：依据岩性、岩相及古生物等资料,将新疆巴里坤一带的一套早泥盆世地层厘定为下泥盆统大南湖组,并可分为下上两部分:下部以沉积碎屑岩为主,上部以火山岩和火山碎屑岩为主;从阿也尔苏剖面中采集到的Atrypa、Ca marotoechia、Howellella、Megastrophia和Leptaenopyxis等腕足化石,可与准噶尔盆地西部下泥盆统顶部的芒克鲁组、东部下泥盆统托让格库都克组等地层对比,化石组合呈现早泥盆世晚期(埃姆斯期)特征。生物地理区系分析认为,该地腕足动物同新疆北部准噶尔、东北北部、内蒙古等地同属老世界大区的巴尔喀什-蒙古-鄂霍茨克区。通过生物地层的分析,使研究区该组地质时代有了确切的化石依据,有利于该地泥盆纪地层层序的厘定和地层格架的完善。Based on lithology, facies and fossils, the strata lying northern Sandaoling area was definited as Dananhu Formation.The brachiopod fossils found in the Formation(D1d), such as Leptaenopyxis,Megakozlowskiellina,Megastrophia and Leptoslrophia,are most similar to those which found in the Mangkelu Formation, Tuoranggekudouke Formation, the stratotype of the Dananhu Formation in Hami, so the geological age of Dananhu Formation in the research area should be Emsian Period in Early Devonian;Its Zoogeography belongs to the Balkhash-Mongolia-Okhotsk Region of the Old World Realm (Devonian).

关 键 词：新疆 巴里坤 大南湖组 生物地层 生物地理区系 

分 类 号：P534.44[天文地球—古生物学与地层学]