地质论评2016，Vol.62Issue(6)：1392-1402,11.DOI:10.16509/j.georeview.2016.06.003
关于辽西北票组地质时代及区域对比的再讨论
Rediscussion on Geologic Age and Regional Correlation about Beipiao Formation in Western Liaoning
摘要
Abstract
Objectives:The Beipiao Formation is major Jurassic coal-bearing stratum in Western Liaoning.Most scholars believe that the Beipiao Formation is belonged to the Early Jurassic and can be correlated with Yaopo, Yongdingzhuang,Fuxian and Sangonghe Formation.But we think there are contradictions in the conclusions,so this article attempts to solve the above problems. Methods:Based on the comprehensive analysis about the stratigraphic sequence,lithology,tectonic evolution and paleoclimate evolution,we discuss the geologic age and regional correlation about the Beipiao Formation. Results:We think that the Beipiao Formation is the coal-bearing basin deposits between the early—middle period of Early Jurassic Xinglonggou Formation erupted in the crustal extension stage after indosinian and the middle—late perod of Middle Jurassic Haifanggou,Lanqi Formation erupted in Yanshanian.The former volcanic activity formed Nandaling Formation in Northern Hebei and Western Beijing,volcanic rock interlayer in part of Northern Sinkiang;The latter volcanic activity formed Jiulongshan—Tiaojishan Formation in Northern Hebei and Western Beijing,Yungang—Tianchihe Formation in Northern Shanxi,Toutunhe Formation in Northern Sinkiang. At the bottom of Beipiao Formation is motley and there are not more fossils,low organic matter,and the climate was relatively dry.The plant fossils and sporopollen in Beipiao(above the motley part),Haifanggou,Lanqi Formation prove that the ancient climate evolved from humid cool to dry heat gradually.The characteristic is same to the Northern China and the global in Jurassic. Conclusions:The motley stratum at the bottom of Beipiao Formation belongs to the late Early Jurassic and can be correlated with Sangonghe, Fuxian, Yongdingzhuang, Yangjuan Formation and the basal bed of Yaopo Formation;Beipiao Formation(above the motley part)belongs to the early Middle Jurassic and can be correlated with Xishanyao,Yanan,Datong,Xiahuayuan Formation and Yaopo (above the K1 sandstone)Formation.关键词
辽西/北票组/地层层序/构造演化/古气候演化/地质时代/区域对比Key words
Western Liaoning/Beipiao Formation/Stratigraphic sequence/Tectonic evolution/Paleoclimate evolution/Geologic age/Regional correlation引用本文复制引用
张路锁,谢明忠,张树胜,张新生,尚洪田,李绪慧,吴瑞芳..关于辽西北票组地质时代及区域对比的再讨论[J].地质论评,2016,62(6):1392-1402,11.基金项目
本文为河北省矿产资源潜力评价项目（编号121201813003）的成果。AcknowledgmentsSubsidized by mineral resources potential evaluation project of Hebei province （）
