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Neoproterozoic arc-magmatism of the Silet Terrane, Western Hoggar (Algeria), new constraints from zircon U-Pb-Hf isotope analyses and whole rock geochemistry
Gondwana Research ( IF 7.2 ) Pub Date : 2024-10-09 , DOI: 10.1016/j.gr.2024.10.003
Narimene Berrahmane, El-Hocine Fettous, Abderrahmane Bendaoud, Sid Ali Doukkari, Basem Zoheir, Armin Zeh

This study presents results of zircon U-Pb-Hf isotope analyses and whole-rock geochemistry applied to magmatic rocks of the Silet terrane in the Western Hoggar, forming a part of the Neoproterozoic arc exposed along the boundary between the LATEA metacraton and the Paleoproterozoic In Ouzzal terrane. According to zircon U-Pb geochronology four distinct pulses of Neoproterozoic granitoids magmatism are recognized in the Silet terrane: Tonian (c. 870–840 Ma), Late Tonian (c. 770 Ma), Latest Tonian (c. 730 Ma) and Late Cryogenian (c. 675 Ma).

中文翻译:


西霍加尔(阿尔及利亚)Silet Terrane 的新元古代弧岩浆作用,锆石 U-Pb-Hf 同位素分析和全岩地球化学的新限制



本研究介绍了锆石 U-Pb-Hf 同位素分析和全岩地球化学的结果,应用于西霍加尔 Silet 地层的岩浆岩,构成了沿 LATEA 变克拉通和古元古代 In Ouzzal 地层边界暴露的新元古代弧的一部分。根据锆石 U-Pb 地质年代学,在 Silet 地层中发现了四种不同的新元古代花岗岩岩浆作用脉冲:Tonian(约 870-840 马)、晚期 Tonian(约 770 马)、最新的 Tonian(约 730 马)和晚期低温(约 675 马)。
更新日期:2024-10-09
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