Constraints of petrography, geochemistry and sr-nd isotopes on the jinjing granitoids from northeastern hunan province, china: implications for petrogenesis and geodynamic setting.
文献类型：期刊论文
| 作者 | Li, PC; Xu, DR; Chen, GH; Xia, B; He, ZL; Fu, GG |
| 刊名 | Acta petrologica sinica
 |
| 出版日期 | 2005-05-01 |
| 卷号 | 21期号:3页码:921-934 |
| 关键词 | Yanshanian epoch Sp granitoids Intracontinental syn-collisional setting Geochemistry Sr-nd isotopes Jinjing area Northeastern hunan province |
| ISSN号 | 1000-0569 |
| 通讯作者 | Li, pc(lpcjpi@163.com) |
| 英文摘要 | The yanshanian granitoids occurred widely in northeastern hunan province, china and intruded into the mesoprolerozoic lengjiaxi group. the granitoids in jinjing area belong to strong peraluminous high k calc-alkaline series, which show high contents of sio2(average at 72.8%) and na2o +k2o (7.16 similar to 8.74%), and high values of asi (generally > 1. 1). based on content of cao, the granitoids can be divided into high ca-type and low ca-type. the chondrite-normalized ree patterns are characterized by lree enrichment with variable degree of negative eu anomalous sizes ( delta eu = 0. 53 similar to 0. 78, average at 0. 63). the primitive mantal-normalized spidergrams show that they are enriched in lile and depleted in hfse. these geochemical characteristics are similar to those of the mesoproterozoic lengjiaxi group except for the remarkably depletion in sr, indicate that the granitoids have been derived from the mesoproterozoic lengjiaxi group, and that abundant biotites are still in the residue. the epsilon(nd) ( 140 ma) values ( - 10 similar to - 12)\ and the initial sr-87/sr-86 ratios (0. 72204 similar to 0. 72540) further support that the jinjing pluton has a derivation from partial melting of metasandstone (high ca) and metamudstone (low ca), but significant input of minor mantle material into the provenance cannot be ruled out, due probably to k-rich basaltic magmatic underplating resulted by lithosphere delamination and upwelling of hot asthenosphere. high rb/sr(3 similar to 6) and high p2o5 contents(0.09 similar to 0.15wt. %), low sr/ba(0.2 similar to 0. 7), al2o3/tio2 ratios(40 similar to 70 < 100), low zr contents ( 100 similar to 150ppm) and feo/mgo ratios indicate that the granitic melts were generated under high temperature (+/- 800 degrees c), high pressure ( similar to 8kbar) and water-undersaturated conditions through biotite-dehydration melting within middle to lower crust. based on the tectonic development of south china, we suggest that the yanshanian granitoids in jinjing area have been generated in intra-continental syn-collision setting, hinting that the tectonic regime has been transformed from compression to extension across the mesozoic-cenozoic transition in northeastern hunan province. |
| WOS关键词 | SOUTHEASTERN CHINA ; SOUTH CHINA ; TECTONIC EVOLUTION ; JIANGXI PROVINCE ; PERALUMINOUS GRANITES ; ORIGIN ; SYSTEM ; ROCKS ; CRYSTALLIZATION ; GEOCHRONOLOGY |
| WOS研究方向 | Geology |
| WOS类目 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000231179000030 |
| 出版者 | SCIENCE PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2377619 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Li, PC |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Marginal Sea Geol, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Gangzhou Inst Geochem, Guangzhou 510640, Peoples R China 3.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, PC,Xu, DR,Chen, GH,et al. Constraints of petrography, geochemistry and sr-nd isotopes on the jinjing granitoids from northeastern hunan province, china: implications for petrogenesis and geodynamic setting.[J]. Acta petrologica sinica,2005,21(3):921-934. |
| APA | Li, PC,Xu, DR,Chen, GH,Xia, B,He, ZL,&Fu, GG.(2005).Constraints of petrography, geochemistry and sr-nd isotopes on the jinjing granitoids from northeastern hunan province, china: implications for petrogenesis and geodynamic setting..Acta petrologica sinica,21(3),921-934. |
| MLA | Li, PC,et al."Constraints of petrography, geochemistry and sr-nd isotopes on the jinjing granitoids from northeastern hunan province, china: implications for petrogenesis and geodynamic setting.".Acta petrologica sinica 21.3(2005):921-934. |
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来源：中国科学院大学
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