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渣尔泰山处阴山山脉中段北部,石龙湾地区指内蒙古巴盟乌拉特前旗小佘太公社书记沟一带。该地区出露一套深灰、灰绿、暗灰色和浅灰、粉灰色的二云母斜长变粒岩、绿帘二云斜长变粒岩、二云变粒岩、斜长黑云残斑片岩、绿帘黑云斜长残斑片岩、绿帘蓝闪片岩和黑云绿帘蓝闪片岩等变质岩地层,岩石普遍具有不同程度的糜棱岩化及混合岩化现象。这套地层的外貌特征、岩石组合特点及岩石变质程度等均与渣尔泰群其它岩组截然不同,目前根据其总体产状,暂划归刘洪湾组,其确切的时代归属和划分对比还有待深入研究。最近,我们在该地层中首次发现蓝闪片岩。现将其薄片资料和岩石化学成份资料叙述如下:
Zarry mountain Yarlung mountains in the middle of the northern part of Shilongwan area refers to Inner Mongolia Wulateqianqi small She too commune clerk ditch area. The area exposed a set of dark gray, gray green, dark gray and light gray, pink gray two-mica plagioclase granulite, green curtain Ergyun plagioclase granulite, two cloud granulite, plagioclase dark residual Plagioclase, greenbelt dark plagioclase plagioclase, green curtain blue flash schist and dark cloud green curtain blue flash schist and other metamorphic rocks. The rocks generally have different degrees of mylonitization and mixed rock formation. The features of this stratum, the characteristics of rock assemblages and the degree of rock metamorphism are all very different from other rock masses of the Zhaltai Group. At present, according to their overall occurrence, they are temporarily assigned to the Liuhongwan Formation, and their exact age attribution and division are compared Still needs further study. Recently, we found the bluedrite schist in this formation for the first time. The sheet material and rock chemical composition information is as follows: