中祁连西段德勒诺尔一带南华系的重新厘定及其与Rodinia超大陆裂解的关系  

The redefinition of the Nanhua System in the Delenor area in the western part of the Central Qilian and their relationship to the breakup of the Rodinia supercontinent

作　　者：张立涛 余君鹏[2] 余吉远[3] 陈杰 赵吉昌 樊新祥 ZHANG Litao;YU Junpeng;YU Jiyuan;CHEN Jie;ZHAO Jichang;FAN Xinxiang(No.4 Geological Mineral Exploration Institute,Gansu Geological Mineral Explorationand Development Bureau,Jiuquan 735000,Gansu,China;Gansu Institute of Geological Survey,Lanzhou 730000,Gansu,China;Xi’an Center,China Geological Survey,Xi’an 710054,Shaanxi,China)

机构地区：[1]甘肃省地质矿产勘查开发局第四地质矿产勘查院,甘肃酒泉735000 [2]甘肃省地质调查院,甘肃兰州730000 [3]中国地质调查局西安地质调查中心,陕西西安710054

出　　处：《地质通报》2021年第4期491-498,共8页Geological Bulletin of China

基　　金：中国地质调查局项目《甘肃祁连西段德勒诺尔-石板墩地区1∶5万六幅区域地质调查》(编号:121201011000150004)、《祁连成矿带--大柴旦地区地质矿产调查》(编号:DD20160012)

摘　　要：中祁连西段德勒诺尔一带广泛分布新元古界火山-沉积岩系。1∶5万区域地质调查中,新发现了一套冰碛-火山岩系,通过对岩石学、地层学特征研究,认为其可与新疆库鲁克塔格地区的南华系贝义西组对比,同属南华纪冰期-火山事件的产物,并将该套地层重新厘定为南华系石板墩组。研究认为,中祁连西段德勒诺尔冰碛-火山岩系的存在,是祁连微陆块响应Rodinia超大陆裂解的证据,对研究祁连山中—新元古代构造演化具有重要意义。The volcano-sedimentary rocks of the Neoproterozoic Erathem are widely distributed in the Delenuoer area of the western segment of the Central Qilian.A new set of moraine-volcanic rocks was discovered in the 150000 regional geological survey.Based on the study of its petrologic and stratigraphic characteristics,it is considered to be parallel to the Nanhua System Beiyixi Formation in the Kuruktag area of Xinjiang,both of which are the products of the Nanhua Period Ice Age-volcanic event.This set of strata is redefined as the Nanhua System Shibandun Formation.From this study,it is believed that the existence of the moraine-volcanic rocks in Delenuoer of the western segment of the Central Qilian is the evidence of the Qilian Microcontinent Block responding to the splitting of the Rodinia supercontinent,which is of great significance for the study of the tectonic evolution of the Qilian Mountains in the Meso-Neoproterozoic.

关 键 词：中祁连西段 冰碛-火山岩系 南华系 库鲁克塔格 RODINIA超大陆 

分 类 号：P534.3[天文地球—古生物学与地层学]