藏南洛扎地区中生代生物组合与沉积环境分析

较详细分析了．洛扎地区晚三叠世一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Monotissalinaria-M．haueri生物群落，陆棚风暴碎屑岩型Entoliumnieniexionglaense—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-Euestheria群落，晚侏罗世浅海陆棚泥岩型Buchiablanfordiana-Vingatosphinctes-Belemnopsis群落，凝缩段泥岩环境中的Belemnopsisaucklandica群落，穹隆或洼地及斜坡带上低位域Hibolithes jiabulensis—Belemnoposs sinensis群落，广海陆棚型Belemnopsis—BfandiacePas—Haplophylloceras群落，广海瞄掘型Himalayites-Spiticeras群落，广海陆棚型Berriasellidae-lnoceramus群落，广海陆棚型Cruralina-Peregrinella群落，闭塞泻湖型Ancylocaratidae—Bochitidae群落。建立了区内晚三叠-早白垩世沉积-生态地层格架。

MESOZOIC SEDIMENTARY ENVIRONMENT AND BIOLOGICAL COMPOSITION IN LUOZHA,SOUTH TIBET

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 she...