辽西凌源地区中侏罗统邓杖子组沉积环境探讨  

SEDIMENTARY ENVIRONMENT OF JURASSIC DENGZHANGZI FORMATION IN LINGYUAN AREA OF WESTERN LIAONING PROVINCE

作　　者：马文坡 张海龙 

机构地区：[1]辽宁省地质勘查院,辽宁大连116100

出　　处：《地质与资源》2014年第A01期35-37,59,共4页Geology and Resources

摘　　要：通过对辽西凌源地区牛营子盆地邓杖子组地层剖面测制,结合岩石组合、沉积构造及相序叠置关系等因素分析研究,认为邓杖子组沉积环境为冲积扇相.邓杖子组下部岩性为灰色厚层—巨厚层中—粗粒石灰岩质砾岩,沉积环境为扇根亚相,由筛积物沉积、泥石流沉积组成;中部主要为灰绿色薄层中细粒长石砂岩、细粒钙质砂岩,夹灰色石灰岩质砾岩、含砂质灰岩等,由扇中亚相和扇端亚相组成;上部岩性为灰色中厚层—厚层夹厚层—巨厚层石灰岩质砾岩,沉积环境可识别出扇中亚相和扇根亚相,二亚相均由河道沉积和漫流沉积组成.Based on the mapping of stratigraphic section for Dengzhangzi Formation in Niuyingzi Basin in Lingyuan area,Western Liaoning Province,with comprehensive analysis of rock association,sedimentary structure and superimposed relations of facies sequence,it is recognized that the sedimentary environment of this formation is alluvial fan facies.The lithology of the lower part is thick-huge thick medium-coarse grained gray limestone conglomerate,with sedimentary environment of root fan subfacies composed of sieve sediments and debris flow deposits.The middle part consists of mainly thin greyish green medium-fine grained arkose and fine grained calcareous sandstone with gray limestone conglomerate and sandy limestone,composed of middle and side fan subfacies.The upper part is of medium thick-thick with thick-huge thick gray limestone conglomerate,deposited in the environment of middle and root fan subfacies,which are both composed of channel deposits and sheet flow deposits.

关 键 词：邓杖子组 沉积环境 扇根亚相 扇中亚相 扇端亚相 辽宁省 

分 类 号：P512.2[天文地球—地质学]