Paleoproterozoic magmatism across the Archean-Proterozoic boundary in central Fennoscandia: Geochronology, geochemistry and isotopic data (Sm-Nd, Lu-Hf, O)
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- 作者：Raimo Lahtinena ; raimo.lahtinen@gtk.fi" class="auth_mail" title="E-mail the corresponding author ; Hannu Huhmaa ; Yann Lahayea ; Stefanie Lodeb ; Suvi Heinonena ; Mohammad Sayaba ; Martin J. Whitehousec
- 关键词：Paleoproterozoic ; Fennoscandia ; Oxygen isotopes ; U&ndash ; Pb ; Sm&ndash ; Nd ; Lu&ndash ; Hf
- 刊名：Lithos
- 出版年：2016
- 出版时间：1 October 2016
- 年：2016
- 卷：262
- 期：Complete
- 页码：507-525
- 全文大小：4288 K
文摘
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Crustal melt components in the CFGC derive from the concealed Keitele microcontinent.
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Bimodal 1.87–1.85 Ga magmatism has its sources in the 2.1–2.05 Ga plume event.
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Crustal contamination produces “subduction-like” Nb–Ta minimum in spidergrams.
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Titanite ± rutile partly prevailing in the residue causes Nb–Ta fractionation.
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Igneous and metasedimentary granulites occur as source rocks for A-type felsic melts.