首页 | 本学科首页   官方微博 | 高级检索  
     

贺兰山中段震旦系盖帽白云岩的沉积特征、区域对比及意义
引用本文:蔡雄飞,何文键,杨捷,吴丽云,曾佐勋,顾延生. 贺兰山中段震旦系盖帽白云岩的沉积特征、区域对比及意义[J]. 火山地质与矿产, 2014, 0(2): 106-113
作者姓名:蔡雄飞  何文键  杨捷  吴丽云  曾佐勋  顾延生
作者单位:[1]中国地质大学生物地质与环境地质国家重点实验室,武汉430074 [2]中国地质大学地球科学学院,武汉430074 [3]广东省河源市核工业地质局二九二大队,河源51700 [4]长江水利委员会三峡勘测研究院有限公司,武汉430074
基金项目:中国地质调查局地质调查项目“水磨沟等5幅1∶5万;腰坝等4幅1∶5万”(项目编号1212011120552)资助.
摘    要:2011年,作者在贺兰山中段腰坝配件厂地区进行1∶5万区域地质调查时发现了震旦系盖帽白云岩,进而研究了其沉积特征、碳氧同位素组成和时代,并与该区紫花沟兔儿坑组白云岩、华南和华北地台南缘相应地层进行对比.结果表明,盖帽白云岩为含陆源细碎屑白云岩,与兔儿坑组白云岩相近;其δ13C值为-4.7‰~0.79‰,且自下而上呈下降趋势;其时代与华南震旦系下、中部相当,与华北地台南缘震旦系罗圈组的沉积特征和古地理环境相近;与全球Gaskiers冰期有相关性.这对华北地台的古构造、古地理、古气候及动物演化“源头”的研究有重要意义.

关 键 词:盖帽白云岩  沉积特征  区域对比  震旦系  贺兰山  华北地台

Sedimentary characteristics,regional comparison and implication of the Sinian cap dolomites in the middle Helan Mountain
CAI Xiong-fei,HE Wen-jian,YANG Jie,WU li-yun,ZENG Zuo-xun,GU Yan-sheng. Sedimentary characteristics,regional comparison and implication of the Sinian cap dolomites in the middle Helan Mountain[J]. Resources Survey & Environment, 2014, 0(2): 106-113
Authors:CAI Xiong-fei  HE Wen-jian  YANG Jie  WU li-yun  ZENG Zuo-xun  GU Yan-sheng
Affiliation:1. State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences Faculty of Earth Sciences, China University of Geosciences , Wuhan 430074, China) (2 .292 Brigade, Nuclear Industry Geological Bureau in Heyuan City, Heyuan 51700, China) (3 Three Gorges Geotechnical Consultants Co., Ltd., Wuhan 430074, China)
Abstract:Sinian cap dolomites have been found in Peijianchang area, Helanshan Mountain, when performing the 1.50 000 geological survey in 2011. The sedimentary characteristics, C-O isotopes, compositions and age of the dolomites were studied, and correlated with the contemporaneous dolomites from Zihuagou area and correspondent strata from the south margins of, South China and North China Platforms. The dolomites in the studied area belong to terrigeous clastric dolomites, which resemble that of Tuerken formation, Zihuagou area. The δ13C values range from -4.7‰ to -0.79‰, and decrease with the ascending order. The carbonates share the similar sedimentary characteristics and palaegeographic environ-ments with the lower-upper Sinian in South China and the Sinian Luoquan Formation in the south margins of North China platform. Thus, this study could be contributed to the study on the palaeotectonics, palae-ogeography and palaeoclimatology of North China platform, and the evolution of invertebrates.
Keywords:cap dolomite  sedimentary characteristics  regional comparison  Sinian  Helan MountainNorth China platform
本文献已被 维普 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号