新疆吐鲁番桃树园二叠—三叠系古地磁初步研究  

STUDY ON PALAEOMAGNETISM OF PERMIAN-TRIASSIC IN PANTAOYUAN OF TULUFAN, XINJIANG

作　　者：李永安[1] 李锦玲[2] 程政武[3] 孙东江[1] 刘俊[2] 郑洁[1] 

机构地区：[1]新疆维吾尔自治区地质矿产勘查开发局地质矿产研究所,新疆乌鲁木齐830000 [2]中国科学院古脊椎动物与古人类研究所,北京100044 [3]中国地质科学院地质研究所,北京100037

出　　处：《新疆地质》2004年第2期136-142,共7页Xinjiang Geology

基　　金：国家重点基础研究发展规划项目(G2000077705)资助

摘　　要：通过对吐鲁番桃树园二叠—三叠系古地磁特征初步研究,建立了二叠—三叠系界线磁性层柱,将其界线置于锅底坑组中下部,即37—36层(采点66～65).对二叠、三叠系古地磁研究表明,其古纬度为北纬26°～35°,属热带—北温带古气候环境,与古生物资料和沉积相相一致,推断古生物灭绝与新生,可能与地磁的转化密切相关。Based on the study on palaeomagnetism characteristics of Permian-Triassic occurring in Pantaoyuan of Tulufan, rnagnetical stratigraphical column was established. The border was confined between 37th layer and 36th layer (viz 66-65 spot) in lower Guodikang formation.Palaeomagnetism characteristics of Permian-Triassic showed that this area was in north latitude 26°-35° belonging to tropic to the north temperate zone in that time. This conclusion is also consistent with the evidenc of paleontology and sedimentary facies.The dying-off and rebirth of the ancient life may have relations with the transform of the palaeomagnetism, but this assumption need to be proved by the further study.

关 键 词：古地磁 三叠系 界线 古气候环境 古生物 沉积相 磁性层 桃树 温带 热带 

分 类 号：P318[天文地球—固体地球物理学]