Coeval late-Variscan emplacement of granitic rocks: an example from the Regensburg Forest, NE Bavaria
文献类型：期刊论文
| 作者 | Siebel, Wolfgang; Hann, Horst Peter; Shang, Cosmas Kongnyuy; Rohrmueller, Johann; Chen, Fukun |
| 刊名 | NEUES JAHRBUCH FUR MINERALOGIE-ABHANDLUNGEN
 |
| 出版日期 | 2006-11-01 |
| 卷号 | 183期号:1页码:13-26 |
| 关键词 | geochemistry geochronology granite petrogenesis Regensburg Forest Variscan magmatism zircon |
| ISSN号 | 0077-7757 |
| DOI | 10.1127/0077-7757/2006/0058 |
| 文献子类 | Article |
| 英文摘要 | Detailed field mapping in the Regensburg Forest, West Bohemian Massif, has enabled us to trace the distribution of a group of minor intrusions (granodiorites, granite porphyry dykes, two-mica granites). In order to unravel their genetic relation and to constrain their age, geochemical and geochronological studies were carried out. Pb-207/Pb-206 evaporation analyses of zircons gave ages of 324 +/- 2 Ma for a granodiorite (Stallwang granodiorite), and 323 +/- 2 Ma for a granite porphyry dyke. U-Th-Pb dating of monazite from a two-mica granite body gave concordant ages of 323 +/- 4 Ma (average Pb-207/U-235-age), 322 +/- 5 Ma (average Pb-206/U-238-age) and 323 +/- 5 Ma (average Pb-208/Th-232-age). All these ages define the crystallization times and therefore reflect the simultaneous emplacement of the granitoids. The age determination was largely complicated by the predominance of inherited zircon cores. Combining zircon geochronology with geochemical and Sr-Nd data, it becomes evident that the granitoids were derived from Palaeozoic crustal protoliths which, in turn, contain components from Proterozoic (or older) rocks. A source-rock evaluation based on major element oxides allows discriminating between different protoliths. Lithological compositions similar to presently exposed country rock gneisses (mainly greywacke transformed into more or less homogeneous diatexite) are a potential source for the two-mica granites. The geochemistry of the granite porphyry dykes and the granodiorite is consistent with the experimental results of melting mafic pelitic and amphibolitic protoliths, respectively. |
| WOS关键词 | HIGH-TEMPERATURE METAMORPHISM ; NW BOHEMIAN MASSIF ; ISOTOPE DISEQUILIBRIUM ; CRUSTAL ANATEXIS ; BAYERISCHE WALD ; CENTRAL-EUROPE ; ZIRCON AGES ; FOLD BELT ; ND ; SR |
| WOS研究方向 | Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:000242301800002 |
| 出版者 | E SCHWEIZERBARTSCHE VERLAGSBUCHHANDLUNG |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/66224]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Siebel, Wolfgang |
| 作者单位 | 1.Univ Tubingen, Inst Geowissensch, D-72074 Tubingen, Germany 2.Bayer Landesamt Umwelt, D-95615 Marktredwitz, Germany 3.Chinese Acad Sci, Lab Radiogen Isotope Geochem, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Siebel, Wolfgang,Hann, Horst Peter,Shang, Cosmas Kongnyuy,et al. Coeval late-Variscan emplacement of granitic rocks: an example from the Regensburg Forest, NE Bavaria[J]. NEUES JAHRBUCH FUR MINERALOGIE-ABHANDLUNGEN,2006,183(1):13-26. |
| APA | Siebel, Wolfgang,Hann, Horst Peter,Shang, Cosmas Kongnyuy,Rohrmueller, Johann,&Chen, Fukun.(2006).Coeval late-Variscan emplacement of granitic rocks: an example from the Regensburg Forest, NE Bavaria.NEUES JAHRBUCH FUR MINERALOGIE-ABHANDLUNGEN,183(1),13-26. |
| MLA | Siebel, Wolfgang,et al."Coeval late-Variscan emplacement of granitic rocks: an example from the Regensburg Forest, NE Bavaria".NEUES JAHRBUCH FUR MINERALOGIE-ABHANDLUNGEN 183.1(2006):13-26. |
入库方式： OAI收割
来源：地质与地球物理研究所
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