班公湖-怒江结合带西段侏罗纪木嘎岗日群的重新厘定及意义

沿班公湖—怒江结合带西段出露的侏罗纪木嘎岗日群是一套复理石碎屑沉积组合，代表了班公湖—怒江中特提斯洋盆早—中侏罗世深海—半深海沉积。本文通过详细的地层剖面研究，依据沉积建造、岩性组合及古地理、古生物面貌特征，将原木嘎岗日群进行了重新划分。重新厘定的木嘎岗日群可划分为一、二两个组。在1∶〖KG-*2〗25万区调成果的基础上，分析了重新厘定的木嘎岗日群的沉积层序、沉积构造环境及地质意义。

Renew-Establishment of the Jurassic Mugagangri Groups and Its Geological Significance on the Western Side of the Bangong Co-Nujiang Junction Zone

Mugagangri Groups is a suite of flysch flyschoid elastic deposits, and is Early Middle Jurassic abyssal sedimentary, which is widespread in the western side of the Bangong Co Nujiang junction zone. The paper debates the sequence of sedimentation, tectonic stratigraphic environment of renew establishment Mugagangri Groups and its geological significance on the basis of the regional geological survey of 1∶〖KG-*2〗250 000 Rutog Sheet. The Mugagangri Groups was divided into two formations according to the features of sedimentary formations, rock associations, paleogeography and fossil aspects; it is advisable to separate it from the original Mugagar Kangri stratigraphic area.