| Item type |
itemtype_ver1(1) |
| 公開日 |
2023-03-14 |
| タイトル |
|
|
タイトル |
Geochemistry and K-Ar age of the mafic rocks at the Uubulan area, Khangai-Daur belt, Central Asian Orogenic belt, central Mongolia |
|
言語 |
en |
| 著者 |
NADMID, Bayart
TSUKADA, Kazuhiro
OIDOV, Munkhtsetseg
DAVAANYAM, Sharav
NURAMKHAAN, Manchuk
ALTANSUKH, Lodoidanzan
DAVGADORJ, Khishigbadam
UMEDA, Kanta
|
| 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 |
Mafic rocks |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
K-Ar age |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
Carboniferous accretionary complex |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
Khangai-Daur belt |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
Central Asian Orogenic belt |
| 内容記述 |
|
|
内容記述タイプ |
Abstract |
|
内容記述 |
This paper describes the whole-rock geochemical composition, clinopyroxene (Cpx) chemical composition, and the hornblende K-Ar age of the mafic rocks in the Carboniferous accretionary complex of the Khangai-Daur belt, Central Asian Orogenic belt, exposed at the Uubulan area of Mongolia. The geochemical nature of the mafic rocks, enriched in large ion lithophile elements and light rare-earth elements compared with high field-strength elements (HFSE) and heavy rareearth elements, suggest that they are alkaline basalts. The (La/Yb)cn vs. HFSE diagrams show that the samples are oceanic island basalts. Therefore, the mafic rocks are concluded to be oceanic-island alkaline basalts. The comparatively high concentrations of Al, Ti, Na, and Ca in the Cpx of the mafic rocks strongly support this view. The mafic rocks just beside the Upper Silurian radiolarian chert give a hornblende K-Ar age of 412.7±8.6 Ma. The fact that Upper Silurian chert strongly suggests that the oceanic-island alkaline basalts are conformably underlain by the radiolarian chert formed at the pelagic region as a base of oceanic plate stratigraphy. |
|
言語 |
en |
| 出版者 |
|
|
出版者 |
名古屋大学博物館 |
|
言語 |
ja |
| 出版者 |
|
|
出版者 |
Nagoya University Museum |
|
言語 |
en |
| 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.038.01 |
|
ID登録タイプ |
JaLC |
| 収録物識別子 |
|
|
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
en : Bulletin of the Nagoya University Museum
巻 38,
p. 1-21,
発行日 2023-03-01
|
038_01.pdf (1.4 MB)
