摘要
可可西里西金乌兰湖北侧和岗齐曲北部均有石炭纪—早二叠世的蛇绿岩出露,表明可可西里晚古生代曾有裂谷或洋盆存在。蛇绿岩的上覆浅海相碳酸盐岩中产晚二叠世的?、有孔虫、牙形刺和钙藻等化石,指示了可可西里晚古生代裂谷或洋盆消亡于晚二叠世之前或晚二叠世初。
During the scientific expedition in Hohxil of Qinghai from May to August, 1990, ophiolitewas found in northern Xijir Ulan Lake--Yishan Lake (about 35°19′--35°23′N and 90°10′--90°50′E) and in Kangtejin (about 34°38′N--91°40′E), northern Gangqique. It is considered to beEarly Carboniferous--Early Permian in age mainly based on Tournaisian and Wolfcampianradiolarians (Cyrtisphaeractenium sp. and Pseudoalbaillella chilensis). The ophiolite underlies the carbonates or bioclastic limestones in Shexinggou of northern XijirUlan Lake and in Kangtejin of northern Gangqique. A recent study has revealed that there arePermian fusulinids,foraminifera, conodonts and calcareous algae in the carbonate rocks overlyingthe ophiolite.
出处
《微体古生物学报》
CSCD
北大核心
1992年第2期177-182,252,共6页
Acta Micropalaeontologica Sinica
