新疆西昆仑喀拉阿特河一带玛尔坎雀库塞山组的厘定

The Confirming of Maerkanquekusaishan Formation in Kalaatehe belt in Western Kunlun Mountain,Xinjiang

新疆西昆仑喀拉阿特河一带前人确立的下二叠统(未分)中发现一套火山岩夹碳酸盐岩、碎屑岩沉积建造,与上覆昆盖依套组呈断层接触,与下伏喀拉阿特河组呈平行不整合接触。该套地层在岩石组合、生物面貌、沉积环境、接触关系等方面独立成组,灰岩内采集狭体贝(未定种)Stenoscisma sp.;小戟贝(未定种)Chonetinella sp.;韦勒贝(未定种)Wellerella sp.;扇房贝(未定种)Rhipidomella sp.;股窗贝(未定种)Crurithyris sp.;印度胡斯台贝Hustedia indica(Waagen);胡斯台贝(未定种)Hustedia sp.;扭曲虫Plectogyra sp.;拟犬齿珊瑚Paracania sp.等,时代为早二叠世,故将其从下二叠系(未分)解体出,厘定为玛尔坎雀库塞山组。该套地层单位的确立,为区域填图、建立岩石地层单位,及本区地层划分和区域对比提供了新依据。

The new finding is a suit of volcanic rock with carbonate rock、clastic sedimentary formation of early Perm-ian,which is not divided in the establishment of the Kalaate river belt in West KunLun,Xinjiang, it is fault contact with overlying Kungaiyitao formationand parallel unconformity contact with underlie Kalaate river formation.The new found formation in rock association, biological features, sedimentary environment, contact relationship characteristics can be an independent formation, the acquisition in the limestone are as follows：Stenoscisma sp.;Chonetinella sp.;Wellerella sp.;Rhipidomella sp.;Crurithyris sp.;Hustedia indica （Waagen）;Hustedia sp.,Plectogyra sp.;Paracania sp.,the time were the early Permian,so disintegrate it from the lower Permian,and confirmed it as Maerkanquekusaishan formation.The rea-sonable establishment of the stratigraphic units, and affords a new basis for regional geological mapping,the stratigraphic division and regional correlation in this area.