甘肃北山北部双沟山地区发现泥盆系雀儿山群地层  

DISCOVERY OF THE DEVONIAN QUEERSHAN GROUP IN THE SHUANGGOUSHAN AREA IN THE NORTH OF BEISHAN,GANSU

作　　者：张国英[1] 

机构地区：[1]甘肃省地质调查院,甘肃兰州730000

出　　处：《地层学杂志》2008年第1期51-54,共4页Journal of Stratigraphy

基　　金：中国地质调查局1/25万<红宝石幅>区域地质调查项目

摘　　要：在《红宝石幅》区域地质调查过程中,发现在甘肃北山双沟山地区分布着一套灰绿色中性、中酸性火山熔岩及其凝灰岩地层,通过岩石地层、生物化石及地层年代等方面的研究,经区域地层对比划归雀儿山群,形成时代确定为早泥盆世。该群的确定对恢复哈萨克斯坦板块南缘区域地质演化历史有重要意义。During the regional geological survey, a suite of grey-green intermediate, intermediate-acidity volcanic lava and tuff was found in the Shuanggoushan area in north of Beishan, Gansu. Based on the study of lithostratigraphy, organic fossils and stratigraphic ages and the regional stratigraphic correlation, this bed is assigned to the Queershan Group, and belongs to the Lower Devonian chronostratigraphically. The determination of this group is of important significance to the reconstruction of the regional geological evolutionary history of the southern margin of the Kazakhstan Plate.

关 键 词：雀儿山群 泥盆纪 北山 双沟山 甘肃 

分 类 号：P534.44[天文地球—古生物学与地层学]