Chemostratigraphy of Flood Basalts in the Garze-Litang Region and Zongza Block: Implications for Wes

来源 :Acta Geologica Sinica(English Edition) | 被引量 : 0次 | 上传用户:benbenwenwen
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
The Late Permian Emeishan Large Igneous Province (ELIP) is commonly regarded as being located in the western part of the Yangtze craton, SW China, with an asymmetrical shape and a small area. This area, however, is just a maximum estimation because some parts of the ELIP were not recognized or dismembered and destroyed during the Triassic to Cenozoic tectonism. In this paper, the chemostratigraphical data of the Zongza block, the Garze-Litang belt and the Songpan-Garze block suggest that the Late Permian basalts in these areas have remarkable similarities to the ELIP basalts in petrography and geochemistry. Flood basalts in the Sanjiangkou area are composed of the lower part of the low-Ti (LT) tholeiite and the upper part of the high-Ti (HT) tholeiite, which is the same as the flood basalts on the western margin of the Yangtze craton. Flood basalts in the Zongza and Songpan-Garze areas, which are far from the Yangtze craton, consist of HT tholeiite only. This is the same as the flood basalts within the Y The Late Permian Emeishan Large Igneous Province (ELIP) is commonly considered as being located in the western part of the Yangtze craton, SW China, with an asymmetrical shape and a small area. This area, however, is just a maximum guess because some parts of the ELIP were not recognized or dismembered and destroyed during the Triassic to Cenozoic tectonism. In this paper, the chemostratigraphical data of the Zongza block, the Garze-Litang belt and the Songpan-Garze block suggest that the Late Permian basalts in these areas have remarkable similarities to the ELIP basalts in petrography and geochemistry. Flood basalts in the Sanjiangkou area are composed of the lower part of the low-Ti (LT) tholeiite and the upper part of the high-Ti (HT) tholeiite, which is the same as the flood basalts on the western margin of the Yangtze craton. Flood basalts in the Zongza and Songpan-Garze areas, which are far from the Yangtze craton, consist of HT tholeiite only. This is the same as the flood b asalts within the Y
其他文献
寿山水库控制运用伊通县水利局孙连成,王立春,徐春生1工程概况寿山水库是一座以防洪、灌溉、养渔为一体的综合利用多年调节中型水库。集雨面积91.5km2,总库容1850万m3。枢纽工程由土坝、输水洞
高坝监测系统的地震预报A.H.马尔丘克主题词高坝观测,地震观测,可行性研究,大坝观测对将要发生地震的时间、地点和烈度进行预报是地震学研究的主要目的之一,也是对国家公民安全和非常
教育教学的改革在很大程度上推动了现代职业教育的发展和进步,现代职业教育背景下会计技能教学要实现改革和创新,摒弃传统和守旧的教学模式,开创新的会计教学模式成为了当务
对外经贸在我国产业结构升级中发挥着不可或缺的作用,本文试图就作为对外经贸重要组成部分的对外贸易和利用外资如何在我国产业结构升级过程中更好地发挥作用,谈一些自己的认识
根据目前农村机井管理中存在的问题,通过一个县的调查,针对性地提出了相应的改造措施,并进行了效益分析,可以在同类地区推广。 According to the existing problems in rural we
目的分析和探讨河南省高职高专护生对职业防护的认知,提高护生的职业防护能力,减少职业伤害。方法自行设计调查问卷,通过问卷调查289名高职高专护生职业防护的认知和需求,内
当前中职学校英语教学现状不尽人意,绝大多数学生英语基础差,程度参差不齐,学英语的兴趣不高,相当一部分学生放弃了英语学习,在二十一世纪的今天,英语成了人们文化素质的重要
视频教学在教学实践中发挥着重要作用,但也暴漏出很多问题。作为教师,只有在视频资料的选取上、在视频资料播放的时间上、在发挥教师的主导作用上精心思考和设计,才能真正实
水利行业的贫困,人所共知。水利行业为什么贫困?对政策性资本折耗的盲视,便是导致水利行业贫困的主要因素之一。 水利行业(主要指水管单位)的政策性资本拆耗就是指:按国家规
外语专业除了要训练学生的听、说、读、写、译等基本语言技能,更应该培养学生的文化知识、文化意识、文化能力,这样,外语专业的专长才被突出。为了提高文化在外语专业教学中