检索结果-南通市图书馆

Isotopic and geochemical constraints for a Paleoproterozoic accretionary orogen in the Borborema Province,NE Brazil:Implications for reconstructing Nuna/Columbia

引用

Geoscience Frontiers 2022年第5期13卷 267-285页

作者： Lauro Cézar M.de Lira Santos Geysson A.Lages fabrício a.caxito Elton L.Dantas Peter A.Cawood Haroldo M.Lima Felipe Jda Cruz Lima Departamento de Geologia Universidade Federal de PernambucoAv.da ArquiteturaCidade UniversitáriaRecifePEBrazil Serviço Geológico do Brasil-CPRM Av.SulAfogadosRecifePEBrazil CPMTC Instituto de GeociênciasUniversidade Federal de Minas GeraisAv.Pres.Antônio CarlosPampulhaBelo HorizonteMGBrazil Instituto de Geociências Universidade de BrasíliaCampus Universitário Darcy RibeiroAsa NorteBrasíliaDFBrazil School of Earth Atmosphere and EnvironmentMonash UniversityWellington RdClaytonVIC 3800Australia Departamento de Geologia Universidade Federal do CearáCampus do PiciParquelândiaFortalezaCEBrazil

The Alto MoxotóTerrane of the Borborema Province presents a wide exposure of Paleoproterozoic crust,but unlike other continental blocks of South America,its orogenic history is strongly obliterated by late Neoproterozoic *** isotopic and geochemical studies were conducted in mafic-ultramafic(Fazenda Carmo Suite)and granitic-gneissic rocks(Riacho do Navio Suite)within the *** former present zircon U-Pb crystallization ages at ca.2.13 Ga,whereas Sm-Nd data suggests a juvenile origin via melting of early Paleoproterozoic to Archean peridotitic *** data for these rocks are compatible with tholeiitic magmas with some degree of crustal contamination and trace element distribution points to a continental-arc related setting interpreted as remnants of the early stages of *** contrast,the Riacho do Navio Suite was emplaced at ca.2.08 Ga and has highly negativeεNd(t)values indicating crustal *** suite displays calc-alkali to alkali-calcic and ferroan geochemical signatures compatible with Cordilleran *** addition,trace-element distribution as well as discriminant diagrams suggest that the precursor magmas were generated during the later stages of a continental arc or in a syn-collisional *** on our results,we suggest that the studied units might represent missing pieces of a Paleoproterozoic accretionary orogen that formed the crustal framework of the Alto MoxotóTerrane,and that this represents a block associated with assembly of the Nuna/Columbia supercontinent,which is now largely hidden within the Neoproterozoic orogenic belts of West Gondwana.

关键词： Paleoproterozoic accretionary-collisional event Early orogenic and syn-collisional magmatism Paleoproterozoic inlier within West Gondwana Nuna/Columbia Supercontinent

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

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

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：