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一、前言珠斯楞海尔罕(蒙语:珠斯楞——夏季牧场,海尔罕——山峰)位于巴丹吉林沙漠以北,是甘肃额济纳旗和宁夏回族自治区阿拉善左旗交界线上一条呈南北向的山岭,它由震旦亚界白云岩组成;其东西两侧则是泥盆系分布的地带(图1)。 1960年,甘肃地质局修泽雷等进行1:100万临河幅(K—48)区域地质测量时,于此处首次采到珊瑚Disphyllum,EndoPhyllum,CyathoPhyllum,calceola sandalina及腕足类Atrypa,Tylothyris等,将含化石地层的时代定为下——中泥盆统;他们
I. INTRODUCTION Pearl Strait Haierhan (Mongolian: Pearl Stalk - Summer Pasture, Haierhan - Mountain Peak) is located in the north of Badain Jaran Desert and is the boundary line between Ejin Banner of Gansu and Alxa Left Banner of Ningxia Hui Autonomous Region It is a north-south mountain that consists of the Sinian sub-dolomite, and Devonian distribution on both east and west (Figure 1). In 1960, Gizeu Geological Bureau Xiu Zelei and other 1: 1 million Linhe (K-48) regional geological survey, where the first coral Disphyllum, EndoPhyllum, CyathoPhyllum, calceola sandalina and brachiopods Atrypa, Tylothyris, The age of fossil-bearing formations is defined as Lower-Middle Devonian; they