藏南洛扎地区中生代生物组合与沉积环境分析  

MESOZOIC SEDIMENTARY ENVIRONMENT AND BIOLOGICAL COMPOSITION IN LUOZHA,SOUTH TIBET

作　　者：夏军[1] 王陆太[2] 钟华明[1] 童劲松[1] 鲁如魁[1,3] 

机构地区：[1]安徽省地质调查院,安徽合肥230001 [2]安徽省地质矿产局321地质队,安徽铜陵244051 [3]西北大学,陕西西安710069

出　　处：《安徽地质》2008年第4期248-257,263,共11页Geology of Anhui

基　　金：中国地质调查局"西藏1:25万<洛扎幅>区域地质调查"(01999134061)

摘　　要：较祥细分析了洛扎地区晚三叠世—早白垩世地层中的生物习性特点,对生物的形态功能、行为习性、化石埋藏、生物与环境的关系以及生物之间的相互关系等进行了初步探讨,划分了与环境相适应的十四大古生物群落,晚三叠世高水位体系域Monotis salinaria-M.haueri生物群落,陆棚风暴碎屑岩型E ntolium nieniexiong laense-Cruziana群落,陆棚泥质—火山岩型Coroniceras群落,早侏罗世海侵体系域Melanoides-Discohelix群落,早中侏罗世高水位型Hastites-Chondrites群落,深海凝缩层型Discinisca-E uestheria群落,晚侏罗世浅海陆棚泥岩型Buchia blanfordiana-Ving atosphinctes-Belemnopsis群落,凝缩段泥岩环境中的Belemnopsis aucklandica群落,穹隆或洼地及斜坡带上低位域Hibolithes jiabulensis-Belemnopsis sinensis群落,广海陆棚型Belemnopsis-Blanfardiceras-Haplophy lloceras群落,广海陆棚型Himalay ites-Spiticeras群落,广海陆棚型Berriasellidae-Inoceramus群落,广海陆棚型Cruralina-Pereg rinella群落,闭塞泻湖型Ancy locaratidae-Bochitidae群落。建立了区内晚三叠—早白垩世沉积—生态地层格架。The article analyzed the biological habits characteristics in Late Triassic - Early Cretaceous stratum of Luozha area, maked a preliminary study for the patterns of biological function, behavior habits, buried fossils, the relationship between the biological and environmental as well as biological each other ,divided the 14 major paleontological communtiy adapted to the environment, Late Triassic HST Monotis salinaria-M.haueri communtiy, shelf-type storm debris Entolium nieniexionglaense-Cruziana communtiy, muddy shelf - volcanic Coroniceras communtiy, Early Jurassic TST Melanoides-Discohelix communtiy, Early - Middle Jurassic HST Hastites-Chondrites communtiy, abyssal see condensed section Discinisca-Euestheria communtiy, Late Jurassic mudstone shelf Buchia blanfordiana- V^ngatosphinctes-Belemnopsis communtiy, mudstone condensed section Belemnopsis aucklandica communtiy, LST shelf- slope Hibolithes jiabulensis - Belemnopsis sinensis communtiy, open sea-shelf Belemnopsis-lanfardiceras.-Haplophylloceras, Himalayites-Spiticeras, Berriasellidae-lnoceramus, Cruralina-Peregrinella communtiy, lagoon-blocking Ancylocaratidae-Bochitidae communtiy, a regional Late Triassic - Early Cretaceous sedimentary- ecostratigraphic framework was established.

关 键 词：生物群落 生态地层格架 中生代 洛扎地区 藏南 

分 类 号：P534.52[天文地球—古生物学与地层学] P539.2[天文地球—地质学]