Ultramafic to mafic granulites from the Larsemann Hills, East Antarctica: Geochemistry and tectonic implications
文献类型：期刊论文
| 作者 | Tong, LX (Tong, Laixi)1; Jahn, BM (Jahn, Bor-ming)2; Liu, XH (Liu, Xiaohan)3; Liang, XR (Liang, Xirong)1; Xu, YG (Xu, Yi-gang)1; Ionov, D (Ionov, Dmitri)1,4; Tong, LX |
| 刊名 | JOURNAL OF ASIAN EARTH SCIENCES
 |
| 出版日期 | 2017 |
| 卷号 | 145期号:SI页码:679-690 |
| 关键词 | Prince-charles Mountains Amery Ice Shelf Prydz Bay Area Facies Metamorphism Rauer Group Brattstrand Bluffs Crustal Evolution Continental-crust Vestfold Block 500 Ma |
| DOI | 10.1016/j.jseaes.2017.06.012 |
| 文献子类 | Article |
| 英文摘要 | The Larsemann Hills area is part of a reworked early Neoproterozoic metamorphic terrain in southwestern Prydz Bay, East Antarctica. Ultramafic and mafic granulites, whose origins remain controversial, occur as lenses, boudins or layered bodies within the para- and ortho-gneiss in the region. The ultramafic and mafic granulites show spinel-olivine-bearing and two-pyroxene-bearing mineral assemblages recrystallized at 860-900 degrees C. Their bulk rock analyses indicate an origin as igneous cumulates, with high Mg-# (molar MgO/(MgO + FeO)) from 0.73 to 0.84 for ultramafic granulite and from 0.46 to 0.78 for mostly mafic granulite as well as high Cr and Ni contents ([Cr] and [Ni] up to 1826 ppm and 1400 ppm respectively for ultramafic granulite and [Cr] of 1460 ppm for mafic granulite). Trace element patterns show pronounced negative Nb anomalies, suggesting a subduction-related tectonic setting for their precursors, consistent with derivation from arc basalts, also suggested by low TiO2 and K-enrichment in mafic granulites. The ultramafic to mafic granulites may have been formed in a subduction-related continental back-arc basin environment simultaneously with peak metamorphism associated with arc-continent collision during the early Neoproterozoic (990-900 Ma) Rayner orogeny. |
| 学科主题 | 地质学 |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000411533600026 |
| 源URL | [http://ir.itpcas.ac.cn/handle/131C11/7995]  |
| 专题 | 青藏高原研究所_图书馆 |
| 通讯作者 | Tong, LX |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Guangdong, Peoples R China. 2.Natl Taiwan Univ, Dept Geosci, Taipei 106, Taiwan. 3.Chinese Acad Sci, Inst Tibetan Plateau, Beijing 100085, Peoples R China. 4.Montpellier Univ, Geosci Montpellier, F-34095 Montpellier, France. |
| 推荐引用方式 GB/T 7714 | Tong, LX ,Jahn, BM ,Liu, XH ,et al. Ultramafic to mafic granulites from the Larsemann Hills, East Antarctica: Geochemistry and tectonic implications[J]. JOURNAL OF ASIAN EARTH SCIENCES,2017,145(SI):679-690. |
| APA | Tong, LX .,Jahn, BM .,Liu, XH .,Liang, XR .,Xu, YG .,...&Tong, LX.(2017).Ultramafic to mafic granulites from the Larsemann Hills, East Antarctica: Geochemistry and tectonic implications.JOURNAL OF ASIAN EARTH SCIENCES,145(SI),679-690. |
| MLA | Tong, LX ,et al."Ultramafic to mafic granulites from the Larsemann Hills, East Antarctica: Geochemistry and tectonic implications".JOURNAL OF ASIAN EARTH SCIENCES 145.SI(2017):679-690. |
入库方式： OAI收割
来源：青藏高原研究所
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