吉中地区晚古生代腕足动物古生物地理与环境的协同演化  

COEVOLUTION BETWEEN BRACHIOPOD PALEOBIOGEOGRAPHY OF CENTRAL JILIN AND ENVIRONMENT DURING THE LATE PALEOZOIC

作　　者：李宁[1] 王成文[1] 

机构地区：[1]吉林大学地球科学学院,长春130061

出　　处：《古生物学报》2015年第2期250-260,共11页Acta Palaeontologica Sinica

基　　金：博士点基金(编号:20110061110051)资助

摘　　要：吉中地区发育了普里道利期—洛霍考夫期Retziella、杜内期通气沟组以及空谷期—沃德期哲斯等腕足动物群。前两者属于"暖水"动物群、后者属于"凉水"动物群。同时参考珊瑚和等动物群分析,说明吉中地区从普里道利期至阿瑟尔期发育"暖水"动物群,从空谷期到沃德期发育"凉水"动物群。"凉、暖"转换是以寿山沟组的Monodiexodina动物群为代表,发生在萨克马尔期。"凉、暖"水动物群的发育及其转换是构造古地理与气候变化双重因素导致的结果。晚志留世—早泥盆世,西伯利亚板块、哈萨克斯坦板块、佳-蒙地块均位于中—低纬度带。吉中地区晚志留世—早泥盆世(乃至中泥盆世)腕足动物群属于"暖水"动物群,古生物地理区划属于中-澳生物地理区。石炭纪,东欧板块东北缘、哈萨克斯坦板块大部分地区、佳-蒙地块南缘属于特提斯洋北缘构造域,发育了特提斯洋北缘腕足动物群,形成了特提斯北缘生物地理区,吉中地区腕足动物群属于这一生物地理区。空谷期—沃德期凉水型哲斯腕足动物群的形成是由于佳-蒙地块西端与塔里木板块以及华北板块西端拼合,形成了西拉木伦洋构造域,以及此时期全球降温事件导致的结果。古生物地理、构造古地理以及古气候之间的协同演化关系表明吉中地区晚古生代地层应属于佳-蒙地块南缘的大陆边缘沉积。During the Late Paleozoic,brachiopod faunas of Retziella（Pridoli-Lochkovian）, Tongqigou Formation（Tournaisian）and Zhesi（KungurianWordian）appeared in central Jilin.Retziella and Tongqigou Formation brachiopod faunas were‘warm-water＇brachiopods,and Zhesi brachiopod fauna was a ‘cool-water＇fauna.Meanwhile,we refer to the characteristics of coral and fusulinid faunas.These show that the faunas of central Jilin from Pridoli to Asselian belonged to‘warm-water＇type,and from Kungurian to Wordian belonged to‘cool-water＇type.This conversion from ‘warmwater＇to‘cool-water＇occurred in the Sakmarian,represented by the Monodiexodinafauna of Shoushangou Formation.The development and conversion of ‘warm-water＇and ‘cool-water＇faunas were caused by tectonopaleogeography and climate change.During the late Silurian-Early Devonian,the Siberian Plate,Kazakhstan Plate and JiamusiMongolia Block were located at low northern latitudes.The late Silurian-Early Devonian（even to Middle Devonian）brachiopod fauna of central Jilin belongs to ‘warm-water＇fauna and its paleobiogeography falls within the China-Australia Paleobiogeographic Province.During the Carboniferous,the northeastern margin of the Eastern European Plate,most areas of the Kazakhstan Plate,and the southern margin of the Jiamusi-Mongolia Block comprised the North Margin of Tethys Ocean tectonic domain and its brachiopods,the North Margin of Tethys Ocean brachiopod fauna,comprised the North Margin of Tethys Ocean Province.The Carboniferous brachiopod fauna of central Jilin belonged to this province.During Kungurian-Wordian,the western margin of the Jiamusi-Mongolia Block probably coalesced with the Tarim Plate and the western tip of the North China Plate to form the Xar Moron Ocean tectonic domain.The formation of ‘cool-water＇ Zhesi brachiopod fauna were caused by the Xar Moron Ocean tectonic domain and global cooling event（Caroo Glaciation）. The coevolution between paleobiogeography, tectonopaleogeography and paleoclimate

关 键 词：腕足动物 古生物地理 构造古地理 卡鲁冰期 佳-蒙地块 吉中 

分 类 号：Q915[天文地球—古生物学与地层学]