秦祁昆结合部早中三叠世构造古地理

论述了秦祁昆结合带早中三叠世时不同地区的沉积环境、盆地格架、构造古地理等特征．根据岩石组合特征、沉积特征和古生物化石组合，分析研究了早中三叠世秦祁昆结合带地层的相变、超覆、穿时现象．论述了闹仓坚沟组的岩石组合特征、岩相、时代，并对其含义进行了修订，认为闹仓坚沟组的时代是早中三叠世，由灰岩和碎屑岩组成，灰岩从底部上穿到顶部与碎屑岩呈相变关系．并阐述了秦祁昆结合带的沉积、构造古地理特征。

Triassic Lithofacies Paleogeography in the Joint of Qinling, Qilian and Kunlun

The paper describes the sedimentary environment, basin framework and tectonic paleogeography in different regions in the joint of Qinling, Qilian and eastern Kunlun, Northwest China. It analyzes the facies change, overlapping and time transverse of the strata from Early to Middle Triassic on the basis of rock assemblage and sediment characteristics and fossil assemblages. Then it discusses the rock assemblage and sediment characteristics and age of Naocangjiangou Formation and ended with the revision of its meaning. It is considered that Naocangjiangou Formation could have been formed in from Early to Middle Triassic, consisting of limestone and clastic rocks. The limestone occurs from its bottom to its top with changing facies in between. Furthermore, it expatiates the sedimentary and paleogeographical characters of western Qinling, Qilian and eastern Kunlun.