【摘要】 <正> 眉县、周至、户县、长安、蓝田一带的秦岭北坡,发育有一套变质沉积—火山岩系。因其变质较深,未发现可靠的生物化石,长期被视为宽坪群或秦岭群的一部分,其时代也随之而变化。笔者通过近年调研发现,这套地层的原岩建造、变形变质及含矿性等与宽坪群迥然不同,但与凤(县)太(白)地区的草滩沟群和蟒岭地区云架山群的中、下部基本可以对比,故将其解体出来,另建斜峪关群。它包括下部文家山组和上部干岔沟组,时代属早古生代。更多还原

【Abstract】 Recently,a suit of strata disintegrated from Qinling Group and Kuanping Group between Meixian county and Lantian county on the northern slop of Qinling Mts.has been recognized.It is named Xieyuguan Group,with tuffclastics in the lower parts and volcanics in the upper parts,which are quite different from the original rocks in formation,feature of deformation,metamorphism and ore-bear- ing character etc. Xieyuguan Group belongs to eugeosycline deposits in Early paleozoie Era, which can be probably correlated with both Caotangou Group from Fenxian to Baoji area westward and Yunjiashan Group in the Mangling area eastward.They all belongs to a fold zone of Early Paleozoic Fra in North Qinling Mts.The est- ablishment of Xieyuguan Group is an important link in joining the east and west.更多还原