东特提斯二叠—三叠纪事件概述  

PERMO-TRIASSIC EVENTS IN THE EASTERN TETHYS──AN OVERVIEW

作　　者：Walther C.Sweet 杨遵仪[2] J.M.Dickins 殷鸿福[2] 

机构地区：[1]美国俄亥俄州立大学地质学及矿物学系 [2]中国地质大学 [3]澳洲地质矿产资源局

出　　处：《现代地质》1992年第4期373-383,共11页Geoscience

摘　　要：本文译自《东特提斯二叠—三叠纪(P/T)事件》(英文本)第一章,包括六方面内容:(1)生物地层学,利用腕足类、菊石类、牙形石和植物,建立P/T界线间隔的生物地层表;(2)地球化学研究,讨论目前可用资料,绘出P/T界线间隔的δ^(13)C和δ^(16)O剖面;(3)古地磁研究,借以决定同一界线间隔的划分;(4)火山作用,大多数作者用火山成因解释P/T界线间隔;(5)生物更替原因,包括主要的海侵,广泛的火山作用和火流星的溅射;(6)多方面证据说明P/T界线最好划在Changxingensis带和Isarcica带之间。Being a Chinese translation of the first chapter of 'Permo-Triassic Events in the East- ern Tethys', this article covers 6 aspects of the subject concerned, namely: (1)biostrati- graphy which makes use of several important biotic groups (brachiopods, ammonoids, conodonts and plants) to erect a scale for the P/T boundary interval; (2)geochemical stud- ies dealing with data available at present to draw profiles ofδ13C and δ13 O for the P/T boulldary interval; (3)paleomagnetic investigation which tries to help determining the sub- division of the same boundary interval; (4 ) volcanism explaining by a majority of authors the volcanogenic origin of the P/T boundary interval; (5 )causes of biotic turn--over cover the major rnarine regression, widespread volcanism and splattering from a bolide; (6)the P/T boundary in which all lines of evidence taken together seem to indicate that the boundary may better be drawn between the Challgxingensis and Isarcica zones.

关 键 词：生物地层学 二叠纪 三叠纪 

分 类 号：Q911.6[天文地球—古生物学与地层学]