Petrogenesis of garnet in the Darongshan-Shiwandashan granitic suite of the South China Block and the metamorphism of the granulite enclave
文献类型：期刊论文
| 作者 | Jiao ShuJuan1; Guo JingHui1; Peng SongBai2 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2013-05-01 |
| 卷号 | 29期号:5页码:1740-1758 |
| 关键词 | Garnet petrogenesis Garnet trace element composition Granulite enclave Phase equilibria modeling S-type granite |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | Garnets from the Jiuzhou granitic pluton of the Darongshan-Shiwandashan suite have been distinguished into four types based on their different textural and chemical characteristics: magmatic, peritectic, residual/metamorphic grains, and the transform from peritectic to magmatic that confirms the dissolution-precipitation process. Two types of granulite enclaves are divided based on their different microdomainal mineral assemblages. Recognition of microdomainal mineral assemblages, determination of metamorphic stages, and reaction analyses, combined mineral chemistry with phase equilibria modeling are performed to constrain thermal evolution of the two types of granulite enclave in granite. The original conditions of the granulite enclaves are 800 similar to 830 degrees C and 7. 2 similar to 8. Okbar, which is representative of the garnet-bearing assemblage, reflecting the late stage of the partial melting in the source. Opx + Crd reaction rim around garnet or biotite might be coeval with crystallization of cordierite, and formed at conditions of 810 similar to 860 degrees C and 4. 6 similar to 5. 2kbar. Further decompression results in the formation of Spl + Crd association at 850 degrees C and 3. 1 similar to 3. 8kbar. In combination of the obtained data, a clockwise P-T path is retrieved and characteristic of decompression associated with slightly heating and succedent isobaric cooling in response to ascent and emplacement of the host granitic magma. This study coupled with the available geochronological data from previous researches suggests that the petrogenesis of both granite and its granulite enclave is related to the anatexis of the crust during 250 similar to 260Ma, and might have been provided with heat source by the coeval Emeishan mantle plume. |
| WOS关键词 | LARGE IGNEOUS PROVINCE ; MINERAL EQUILIBRIA CALCULATIONS ; S-TYPE GRANITES ; KONTUM MASSIF ; CENTRAL VIETNAM ; CATHAYSIA BLOCKS ; SYSTEM K2O-FEO-MGO-AL2O3-SIO2-H2O-TIO2-FE2O3 ; PERITECTIC GARNET ; REACTION TEXTURES ; CRUSTAL ANATEXIS |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000321226200020 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/87108]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Jiao ShuJuan |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.China Univ Geosci, Fac Earth Sci, Wuhan 430074, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jiao ShuJuan,Guo JingHui,Peng SongBai. Petrogenesis of garnet in the Darongshan-Shiwandashan granitic suite of the South China Block and the metamorphism of the granulite enclave[J]. ACTA PETROLOGICA SINICA,2013,29(5):1740-1758. |
| APA | Jiao ShuJuan,Guo JingHui,&Peng SongBai.(2013).Petrogenesis of garnet in the Darongshan-Shiwandashan granitic suite of the South China Block and the metamorphism of the granulite enclave.ACTA PETROLOGICA SINICA,29(5),1740-1758. |
| MLA | Jiao ShuJuan,et al."Petrogenesis of garnet in the Darongshan-Shiwandashan granitic suite of the South China Block and the metamorphism of the granulite enclave".ACTA PETROLOGICA SINICA 29.5(2013):1740-1758. |
入库方式： OAI收割
来源：地质与地球物理研究所
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