论文部分内容阅读
此文根据沉积相、火山岩发育特征、夹红层情况、与下伏地层的接触关系、生物相及化石的时代等,将川西高原变质下三叠统划分为7个沉积相区,并分别建立地方性地层单位,以代表不同相区。这些相区及其地层单位,自西向东是:巴塘-得荣相区(茨岗组);乡城然乌卡相区(然乌卡组);义敦相区(党恩组);理塘相区(巴鲁组);木里桐翁相区(领麦沟组),九龙相区(横岩框组);炉霍-宝兴相区(菠茨沟组)。巴塘-得荣相区缺失印度阶,仅发育奥仑尼克阶,其余相区缺失奥仑尼克阶,仅发育印度阶,这体现了川西高原各部分在早三叠世地壳升降、海水进退的差异,反映了早期印支运动的特征。
Based on sedimentary facies, volcanic development characteristics, red sand, contact with underlying strata, biological facies and age of fossils, the authors divided the metamorphic Lower Triassic into seven sedimentary facies zones in the western Sichuan Plateau, Local strata unit, to represent different phases. These facies and stratigraphic units, from west to east are: Batang - Tak Wing-phase area (Cangang group); rural Chengran Uka facies (Ranuka Formation); Litang facies (Baru Formation); Mu Li Tong Weng Xiang (Ling Mai Gou), Jiulong facies (Hengyan Box Formation); Huohuo - Baoxing facies (Panzigou Formation). Batang-De-Rong area lack of Indian order, only the development of the Oronnian, the remaining phase of the absence of the Alennock order, only the development of Indian order, which reflects the various parts of the western Sichuan Plateau in the Early Triassic crustal movements, sea water advance and retreat The difference reflects the characteristics of the early Indo-Chinese Movement.