The Role of Siliceous High-Magnesium Basalts during the Formation of a Neoproterozoic Mafic-Ultramafic Intrusion in the Tarim Craton (China)
| العنوان: | The Role of Siliceous High-Magnesium Basalts during the Formation of a Neoproterozoic Mafic-Ultramafic Intrusion in the Tarim Craton (China) |
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| المؤلفون: | Mingzhe Xia, Zhaode Xia, Yanjiao Ru |
| المصدر: | Minerals, Vol 9, Iss 11, p 662 (2019) Minerals Volume 9 Issue 11 |
| بيانات النشر: | MDPI AG, 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | kuluktag block, lcsh:QE351-399.2, 010504 meteorology & atmospheric sciences, xingdi no.2 mafic-ultramfic intrusion, Geochemistry, engineering.material, tarim craton, 010502 geochemistry & geophysics, 01 natural sciences, enriched subcontinental lithospheric mantle, Ultramafic rock, 0105 earth and related environmental sciences, Basalt, geography, Olivine, geography.geographical_feature_category, lcsh:Mineralogy, Continental crust, Partial melting, Geology, Geotechnical Engineering and Engineering Geology, Craton, siliceous high-magnesium basaltic magmas, continental rift, engineering, Mafic, Zircon |
| الوصف: | The Xingdi No.2 intrusion in the Kuluktag Block of northeastern Tarim Craton, which intrudes into the Palaeoproterozoic basement with an exposed area of ca. 12 km2, is an orthopyroxene-rich mafic-ultramafic intrusion in a continental rift setting. It consists of gabbros, pyroxenites, and peridotites, and exhibits a crystallization sequence of the principal rock-forming minerals from olivine, orthopyroxene, clinopyroxene, to plagioclase. The gabbros show a concordant SHRIMP U-Pb zircon age of 752 ± 5.4 Ma. In addition, the olivine grains have forsterite content values of 78&ndash 85 mole% and mostly contain low NiO, MnO, CaO, and Cr2O3. The rocks are relatively enriched in large ion lithophile elements and LREE, and depleted in HSFE, have non-radiogenic Pb, low &epsilon Nd (t) values (&minus 2.8 to &minus 23), initial 87Sr/86Sr ratios (0.7059&ndash 0.7130). It could be concluded that the rocks represent an analogue of siliceous high magnesium basaltic magma originated by the partial melting of a hydrous and enriched subcontinental lithospheric mantle and contaminated by the continental crust. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ed1e76e1f6b18f2cad0dc79d6cf7d9bf https://www.mdpi.com/2075-163X/9/11/662 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....ed1e76e1f6b18f2cad0dc79d6cf7d9bf |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |