西昌盆地侏罗系新村组震积岩的发现及其地质意义  

Discovery of Seismite in the Jurassic Xincun Formation in the Xichang Basin and Its Geological Significance

作　　者：马继跃 赵春[1] 白宪洲[1] 李名则[1] 

机构地区：[1]四川省地质调查院,成都610081

出　　处：《四川地质学报》2017年第2期192-194,204,共4页Acta Geologica Sichuan

基　　金：中国地质调查局龙门山-滇中成矿带通安和宁蒗地区地质矿产调查项目四川1:5万孟获城(H48E019002);拖乌(H48E020002);中所区(H48E021002);冕山(H48E022002);越西县(H48E021003);凉北林业局(H48E021004)幅区域地质矿产调查子项目(编号:121201010000150016-04)

摘　　要：震积岩是具有震积构造和震积岩序列有一定成因联系的一组岩石。根据野外的系统观察,首次在西昌盆地侏罗系新村组中识别出包括微同沉积正断层、震积角砾岩和微褶皱、液化卷曲变形、液化砂岩脉、枕状构造等软沉积变形构造,均为识别震积岩的重要标志,初步建立了西昌盆地新村组震积岩垂向序列。对该地区陆相碎屑震积岩的野外特征的识别和描述提供了较典型的实际资料和重要的地质理论依据,并可为研究该地区古地震提供依据并分析判断古大地构造环境、内陆控盆边界断裂活动时期。Seismite is a rock with seismic structure and seismite sequence. A set Of seismite criteria such as micro synsedimentary normal fault, seismic breccias and crinkling, liquefied curled deformation, liquefied sandstone vein and pillow structure are recognized in the Jurassic Xincun Formation in the Xichang basin. A vertical seismite sequence is set up in the Xincun Formation. Field identification marks of the seismite are discussed. The discovery of the seismite provides scientific basis for study of ancient earthquake, ancient geotectonic setting and interior basin boundary faulting in the Xichang basin.

关 键 词：震积岩 西昌盆地 侏罗系 新村组 震积序列 

分 类 号：P588.1[天文地球—岩石学] P584[天文地球—地质学]