From emplacement to unroofing: thermal history of the Jiazishan gabbro, Sulu UHP terrane, China
文献类型：期刊论文
| 作者 | Siebel, W.1; Danisik, M.1,2; Chen, F.3,4 |
| 刊名 | MINERALOGY AND PETROLOGY
 |
| 出版日期 | 2009-07-01 |
| 卷号 | 96期号:3-4页码:163-175 |
| ISSN号 | 0930-0708 |
| DOI | 10.1007/s00710-009-0058-1 |
| 文献子类 | Article |
| 英文摘要 | On the eastern extremity of the Jiaodong peninsula, China, shoshonitic magmas have been injected into the supracrustal rocks of the Sulu ultra-high pressure (UHP) terrane during the crustal exhumation phase. These granitoids (collectively termed the Shidao igneous complex or Jiazishan alkaline complex) show geochemical and isotopic signatures of an enriched subcontinental lithospheric mantle and intruded soon after the subducted Yangtze crust had reached peak metamorphic pressure conditions (240-220 Ma). We have applied various geochronometers to an alkali-gabbro sample from the Jiazishan pluton and the results allow reconstruction of the Triassic-to-present thermal history. Initial rapid cooling of the gabbro at crustal depths is indicated by the close agreement between the Sm-Nd mineral isochron age (228 +/- 36 Ma) and the Rb-Sr biotite age (207 +/- 1) Ma. This interpretation is confirmed by previously published U-Pb zircon ages (225-209 Ma), and (40)Ar/(39)Ar amphibole and K-feldspar ages (similar to 214 Ma) from the Jiazishan syenites. A titanite fission-track age of 166 +/- 8 Ma (closure temperature range 285-240A degrees C) records widespread Jurassic magmatism in the Jiaodong peninsula, indicating that the gabbro reached upper crustal levels before it was reheated by nearby Jurassic plutons. A subsequent cooling and reheating event is indicated by an apatite fission-track age of 106 A +/- 6 Ma which coincides with the emplacement of the adjacent Weideshan pluton (108 A +/- 2 Ma) and postdates a period of regional lithospheric thinning beneath eastern China. A period of slow cooling (or thermal stability) from late Cretaceous to early Tertiary, documented by an apatite (U-Th)/He age of 39 A +/- 5 Ma, was followed by a final stage of more enhanced cooling since the late Eocene. Results of this work imply that the eastern Sulu terrane has experienced a complex cooling and reheating history. Our data are consistent with a model of initial rapid cooling (sudden exhumation) of the UHP terrane, driven by the release of buoyancy forces, followed by two progressively slower cooling intervals (both after renewed crustal reheating) during the Jurassic and Cretaceous. |
| WOS关键词 | SR ISOTOPIC EVIDENCE ; EAST-CENTRAL CHINA ; ULTRAHIGH-PRESSURE TERRANE ; COESITE-BEARING ECLOGITES ; APATITE FISSION-TRACK ; TAN-LU FAULT ; OROGENIC BELT ; POSTOROGENIC SYENITES ; METAMORPHIC ROCKS ; RETROGRADE METAMORPHISM |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:000267216100003 |
| 出版者 | SPRINGER WIEN |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/70930]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Siebel, W. |
| 作者单位 | 1.Univ Tubingen, Inst Geosci, D-72074 Tubingen, Germany 2.Curtin Univ Technol, Dept Appl Geol, John de Laeter Ctr Mass Spectrometry, Perth, WA 6845, Australia 3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 4.Univ Sci & Technol China, Sch Earth Sci, Key Lab Crust Mantle Mat & Environm, Hefei 230026, Peoples R China |
| 推荐引用方式 GB/T 7714 | Siebel, W.,Danisik, M.,Chen, F.. From emplacement to unroofing: thermal history of the Jiazishan gabbro, Sulu UHP terrane, China[J]. MINERALOGY AND PETROLOGY,2009,96(3-4):163-175. |
| APA | Siebel, W.,Danisik, M.,&Chen, F..(2009).From emplacement to unroofing: thermal history of the Jiazishan gabbro, Sulu UHP terrane, China.MINERALOGY AND PETROLOGY,96(3-4),163-175. |
| MLA | Siebel, W.,et al."From emplacement to unroofing: thermal history of the Jiazishan gabbro, Sulu UHP terrane, China".MINERALOGY AND PETROLOGY 96.3-4(2009):163-175. |
入库方式： OAI收割
来源：地质与地球物理研究所
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