摘要
在秦昆接合部造山带发现典型的钙质风暴岩主要分布于羊曲—苦海—赛什塘构造混杂带西北侧,由介壳灰岩及泥晶灰岩组成,发育典型粒序层理、丘状交错层理。其发育时期为中三叠世安尼期,为河卡山前陆盆地晚期磨拉石阶段的产物,风暴岩可作为地层划分对比的等时标志,为进一步解剖秦昆接合部造山带三叠纪地层、盆地分析提供了可靠的基础依据。
The typical calc-windstormite discovered in the junction part of Qinling and Kunlun is mainly distributed on the northwestern side of Yangqu-Kuhai-Saishitang tectonic melange belt and composed of shell limestone and micritic limestone with typical graded bed- ding and dwne shaped cross bedding.As a product of molasse stage on Heka fore-continent basin in Middle Triassic Epoch (Anisian stage).It may be looked as a isochronous sign for stratigraphic division and a reliable basis to study the Triassic strata and basin in the oro- genic belt of junction part of Qinling and Kunlun.
基金
1:5万羊曲幅区域地质调查成果
1:25万兴海幅区域地质调查成果
关键词
秦昆接合部造山带
中三叠世
钙质风暴岩
地层
orogenic belt in junction part of Qinling and Kulun
Middle-Triassic Epoch
Cale-windstormite
