The Rand Granite in the southern Schwarzwald and its geodynamic significance in the Variscan belt of SW Germany
文献类型：期刊论文
| 作者 | Hann, HP; Chen, F; Zedler, H; Frisch, W; Loeschke, J |
| 刊名 | INTERNATIONAL JOURNAL OF EARTH SCIENCES
 |
| 出版日期 | 2003-12-01 |
| 卷号 | 92期号:6页码:821-842 |
| 关键词 | Variscan orogeny Schwarzwald Rand Granite Visean nappe zircon age Nd-Sr isotopic composition magmatic arc |
| ISSN号 | 1437-3254 |
| DOI | 10.1007/s00531-003-0361-8 |
| 文献子类 | Review |
| 英文摘要 | The Rand Granite is a heterogeneous metamorphosed granitoid rock complex with numerous wallrock inclusions situated in the Moldanubian Zone at the southern margin of the Central Schwarzwald Gneiss Complex. It is a largely mylonitized elongated body and is thrust over the Badenweiler-Lenzkirch Zone forming a nappe with shear zones along its northern and southern boundaries. It comprises meta-granites, meta-trondhjemites and biotite augen gneisses derived from monzogranites to granodiorites. Mineral behaviour indicates that the magmatic body has been deformed under upper greenschist facies conditions. Nappe thrusting, which also affected the South Schwarzwald Gneiss Complex, occurred in Visean time during high-temperature / low-pressure metamorphism. Kinematic indicators in the mylonites document E- to ESE-directed nappe transport, highly transpressive relative to the trend of the nappe boundaries and the foliation. The trondhjemites formed at 351 +5/-4 Ma, predating the Variscan HT metamorphism. They have initial epsilon(Nd)-values of +6.6 to +6.7 and relatively low initial Sr-87/Sr-86 ratios (0.7042 to 0.7063), indicating a predominant mantle origin. The granites and protoliths of the biotite augen gneisses probably crystallised between 436 and 377 Ma, suggested by U-Pb zircon model ages. They are different from the trondhjemites with low initial epsilon(Nd)-values (-4.7 to -3.3) and higher initial Sr-87/Sr-86 ratios (0.7068-0.7077), indicating that large part of the Rand Granite originated from anatexis of continental crust. Internal structure of zircons from the Rand Granite reveals mixing of magmas derived from both mantle and crust sources. These new data support an interpretation that the Rand Granite developed along an active continental margin and therefore represents a possible root of a Variscan magmatic arc. |
| WOS关键词 | U-PB ZIRCON ; TRACE-ELEMENT GEOCHEMISTRY ; CENTRAL-EUROPE ; BLACK-FOREST ; BOHEMIAN MASSIF ; NATURAL ZIRCON ; HERCYNIAN BELT ; FOLD BELT ; RB-SR ; EVOLUTION |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000187395800001 |
| 出版者 | SPRINGER-VERLAG |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/78429]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Hann, HP |
| 作者单位 | 1.Univ Tubingen, Inst Geol & Palaontol, D-72076 Tubingen, Germany 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 3.Landesamt Geol Rohstoffe & Bergbau Baden Wurttemb, D-70182 Stuttgart, Germany |
| 推荐引用方式 GB/T 7714 | Hann, HP,Chen, F,Zedler, H,et al. The Rand Granite in the southern Schwarzwald and its geodynamic significance in the Variscan belt of SW Germany[J]. INTERNATIONAL JOURNAL OF EARTH SCIENCES,2003,92(6):821-842. |
| APA | Hann, HP,Chen, F,Zedler, H,Frisch, W,&Loeschke, J.(2003).The Rand Granite in the southern Schwarzwald and its geodynamic significance in the Variscan belt of SW Germany.INTERNATIONAL JOURNAL OF EARTH SCIENCES,92(6),821-842. |
| MLA | Hann, HP,et al."The Rand Granite in the southern Schwarzwald and its geodynamic significance in the Variscan belt of SW Germany".INTERNATIONAL JOURNAL OF EARTH SCIENCES 92.6(2003):821-842. |
入库方式： OAI收割
来源：地质与地球物理研究所
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