检索结果-南通市图书馆

Microtextures on quartz grains from the Gulf of Mexico and the Mexican Pacific coastal sediments:Implications for sedimentary processes and depositional environment

引用

Journal of Palaeogeography 2022年第2期11卷 256-274页

作者： Jayagopal Madhavaraju John SArmstrong-Altrin Kandasamy Selvaraj Rathinam Arthur James Estaci on Regional Del Noroeste Instituto de GeologíaUniversidad Nacional Aut onoma de MexicoHermosilloSonora 83000Mexico Universidad Nacional Aut onoma de Mexico Instituto de Ciencias Del Mary LimnologíaUnidad de Procesos Oce anicosy CosterosCiudad UniversitariaCiudad de Mexico 04510Mexico Department of Geological Oceanography and State Key Laboratory of Marine Environmental Science College of Ocean and Earth SciencesXiamen UniversityXiamen UniversityXiamenChina Department of Marine Science Bharathidasan UniversityTiruchirapalli620024Tamil NaduIndia

Microtexture analyes on quartz from coastal sediments of the Gulf of Mexico and the Mexican Pacific Coast reveal 35 and 30 types of microtextures,respectively,which were grouped into mechanical,mechanical/chemical and chemical categories based on their mode of *** of chemical origin are rarer in the El Carrizal than in the Manzanillo beach sediments of the Mexican Pacific *** of mechanical origin like straight and curved scratches,pits,broken edges,and V-shaped marks indicate high energy,fluvial to marine depositional *** scarcity to absence of chemical features suggest that the energy level was higher at the Mexican Pacific coast than on the Gulf of Mexico coast.V-shaped marks are common in the Gulf of Mexico sediments,whereas they are abundant in the quartz grains from the Mexican Pacific *** frequency and density of V-shaped marks are produced by exceedingly high wave velocity during storm events or *** of V-shaped marks with fresh surfaces of quartz grains from the Mexican Pacific coast indicate an extremely high-energy impact *** quartz grains from the El Carrizal beach of the Mexican Pacific coast have abundant closely spaced Vshaped marks with fewer fresh *** high frequency of V-shaped marks is mainly linked to grain-tograin collision,typically associated with high-energy sub-aqueous conditions with a large volume of sedimentary particles in the water column that are produced during a tsunami or storm *** contrast,many quartz grains from the Gulf of Mexico have large fresh surfaces with moderate percentages of V-shaped marks that might have been produced by high-energy waves with low sediment concentrations during storm events.

关键词： Microtextures quartz grains V-shaped marks Tsunami and storm events Sedimentary processes

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Surface textures of quartz grains from a core at the Prydz Bay,Antarctica

引用

Chinese Journal of Polar Science 1997年第2期8卷 24-29页

作者：王祥珍吴时国李传荣陈虹勋罗又郎

In this paper, shapes and surface textures of quartz grains in 13 layers of a core (NP95 1) collected from a continental slope at the Antarctic Prydz Bay were quantitatively and statistically analyzed. The quartz grain surfaces exhibit the characteristics caused by intense glaciation and a weaker chemical solution precipitation, indicating the sediments are mainly morainic debris under a low energy marine environment. The obtained quantitatively statistical results of the assemblages of surface textures caused by the chemical solution precipitation are well correlated to the analytical results of micropaleontologic analysis and can be used to better explain the changes of sedimentary environment and paleoclimate occurred in the marine zone concerned.

关键词： Antarctica quartz grains surface textures quantitative statistics sedimentary environment paleoclimatic change.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：