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A field, geochemical and geochronological perspective on the origin of granitoids and mafic volcanic rocks in the Wecho River area and the nature of ancient crust in the southwestern Slave Province, NWT.

机译：从野外，地球化学和地球年代学的角度，对韦乔河地区花岗岩和镁铁质火山岩的成因以及西南奴隶省西南部古地壳的性质进行了研究。

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The Wecho River area, located in the southwestern Slave Province, approximately 100 kilometres north of Yellowknife, NT, is dominated by Neoarchean granitoid rocks with lesser amounts of meta-sedimentary and associated mafic volcanic rocks. The rocks can be divided into 5 groups based on their age and geochemical characteristics: Central Slave Basement Complex rocks, Group A mafic volcanic rocks, Group B metaluminous plutonic rocks, Group C peraluminous plutonic rocks and the Dauphinee Suite. Plutonism shows a shift from metaluminous to plutonism at 2600 Ma, similar to across the Slave Province. The Nd isotopic data for all groups are consistent with the presence of ancient crust beneath only the eastern side of the Wecho River area at the time of 2608 Ma granite production. The Central Slave Basement complex is thus interpreted to extend into and terminate within the Wecho River area.

机译：韦乔河地区位于奴隶省西南部，在新约州耶洛奈夫以北约100公里处，主要为新古纪花岗岩质岩石，其中含少量准沉积和相关的镁铁质火山岩。根据其年龄和地球化学特征，这些岩石可分为5组：中央奴隶基底复合体岩石，A组镁铁质火山岩，B组金属铝成矿岩，C组铝质深成岩岩体和Dauphinee Suite。在2600 Ma时，岩屑岩显示出从铁质向岩屑岩的转变，类似于整个奴隶省。所有组的Nd同位素数据与2608 Ma花岗岩生产时仅在Wecho河地区东侧下方存在古地壳一致。因此，中央奴隶地下建筑群被解释为延伸到Wecho河地区并在其中终止。

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作者
Buse, Sara Jaine.;
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作者单位

Carleton University (Canada).;

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授予单位 Carleton University (Canada).;
学科 Geology.
学位 M.Sc.
年度 2006
页码 212 p.
总页数 212
原文格式 PDF
正文语种 eng
中图分类地质学;
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A field, geochemical and geochronological perspective on the origin of granitoids and mafic volcanic rocks in the Wecho River area and the nature of ancient crust in the southwestern Slave Province, NWT.

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