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Geochemistry of the Permian–Triassic volcano-plutonic rocks in the Oyut-uul area, northeast of Darkhan, Mongolia : Magmatism at southern margin of Siberian continent
https://doi.org/10.18999/bulnum.033.02
https://doi.org/10.18999/bulnum.033.023d61cce0-afd4-4bc1-b314-0864c9b67125
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
033_02 (1.0 MB)
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| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2015-05-15 | |||||
| タイトル | ||||||
| タイトル | Geochemistry of the Permian–Triassic volcano-plutonic rocks in the Oyut-uul area, northeast of Darkhan, Mongolia : Magmatism at southern margin of Siberian continent | |||||
| 言語 | en | |||||
| 著者 |
TSUKADA, Kazuhiro
× TSUKADA, Kazuhiro× PUREVSUREN, Nemekhbayar× NURAMKHAAN, Manchuk× GANTUMUR, Onon× HASEGAWA, Hitoshi× YAMAMOTO, Koshi |
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| アクセス権 | ||||||
| アクセス権 | open access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Late Paleozoic–Early Mesozoic | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | adakites | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | southern margin of Siberian continent | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Mongolia | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The geochemistry of the Late Paleozoic–Early Mesozoic volcano-plutonic rocks of northern Mongolia is a key factor to understand the subduction-related magmatism at the southern margin of “Siberian continent (Siberian craton + accreted geologic units).” Many studies have been carried out in the volcano-plutonic rocks; however, fundamental questions on its detail petrogenesis still remain unanswered. This paper describes the geochemistry of the Permian–Triassic volcanoplutonic rocks at the Oyut-uul area, northeast of Darkhan City, Mongolia. The mid-ocean ridge basalt (MORB)-normalized multi-element pattern (spidergram) for the examined rocks shows an enrichment of large-ion lithophile elements (LILE) against high-field-strength elements (HFSE) and rare earth elements (REE), with clear negative Nb anomaly to suggest an arc-related igneous activity. The most data are plotted in the calc-alkaline field in the SiO2 vs. FeO*/MgO diagram. It is, thus, concluded that the examined rocks are of calc-alkaline series formed at an arc environment. The present samples, 53– 78 wt.% SiO2, high Al2O3 and Sr concentrations, high La/Yb ratio, and low K2O/Na2O ratio, have adakitic nature derived from oceanic slab-melt. They are quite similar to the marginal facies of the Kitakami adakitic granite of Japan in Sr/Y-Y relationship, MgO concentration, spidergram, and REE chondrite-normalized pattern. It is considered that the marginal facies of the Kitakami adakitic granite was resulted from interaction between the slab-melt and mantle peridotite/lower crustal amphibolite during their ascent. The Oyut-uul rocks might be also derived from oceanic slab-melt interacted with mantle peridotite/lower crustal amphibolite. | |||||
| 言語 | en | |||||
| 出版者 | ||||||
| 出版者 | 名古屋大学博物館 | |||||
| 言語 | ja | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | departmental bulletin paper | |||||
| 出版タイプ | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
| ID登録 | ||||||
| ID登録 | 10.18999/bulnum.033.02 | |||||
| ID登録タイプ | JaLC | |||||
| ISSN（print） | ||||||
| 収録物識別子タイプ | PISSN | |||||
| 収録物識別子 | 1346-8286 | |||||
| 書誌情報 |
ja : 名古屋大学博物館報告 巻 33, p. 15-30, 発行日 2018-03-01 |
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| 著者版フラグ | ||||||
| 値 | publisher | |||||
