Geochemistry, U-Pb geochronology and Sm-Nd data from the Paleoproterozoic Western Finland supersuite – A key component in the coupled Bothnian oroclines

Raimo Lahtinen; Hannu Huhma; Pekka Sipil?; Markus Vaarma

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Geochemistry, U-Pb geochronology and Sm-Nd data from the Paleoproterozoic Western Finland supersuite – A key component in the coupled Bothnian oroclines

机译：来自古木政府古古代西芬兰超级的地球化学，U-PB地理学和SM-ND数据 - 耦合的Bothnian Oroclines中的关键组件

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Highlights

? Basaltic to picritic MORB-WPB-type volcanic rocks typify the WF supersuite (S).

? Age distributions of 1.91–2.2Ga detrital zircons are similar in the TB, PB and HB.

? Most of the 1.94Ga zircon overgrowths in the WF-S are pre-depositional and recycled.

? WF-S and lowermost parts of the TB and HB have similar pre-1.91Ga evolution.

? Single- or two arcs models are shown preceding formation of Bothnian oroclines.

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亮点

？玄武岩到Picritic morb-wpb型火山岩的键入Wf超级资料。

？年龄1.91-2.2 ga拆卸锆石的分布在Tb，pb和hb中类似。

？大多数<1.94 GA WF-S中的锆石过度生长是预沉积和再循环的。

？ TB和HB的WF-S和最下部的TB和HB具有类似的1.91 GA Evolution。

？单个或两个弧模型显示在两个oroclines的形成之前。

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来源
《Precambrian Research 》 |2017年第2017期| 共18页
作者
Raimo Lahtinen; Hannu Huhma; Pekka Sipil?; Markus Vaarma;
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作者单位

Geological Survey of Finland;

Geological Survey of Finland;

Geological Survey of Finland;

Geological Survey of Finland;

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原文格式 PDF
正文语种 eng
中图分类前寒武纪 ;
关键词
Svecofennian orogeny; Paleoproterozoic; Fennoscandia; Oroclines; Detrital zircon geochronology; Sm-Nd;

机译：svecofennian orenogeny;古普罗佐;fennoscandia;oroclines;滴乳锆石地理学学;sm-nd;

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机译：来自古木政府古古代西芬兰超级的地球化学，U-PB地理学和SM-ND数据 - 耦合的Bothnian Oroclines中的关键组件
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Geochemistry, U-Pb geochronology and Sm-Nd data from the Paleoproterozoic Western Finland supersuite – A key component in the coupled Bothnian oroclines

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