La-icp-ms zircon u-pb geochronology and petrology of the muchang alkali granite, zhenkang county, western yunnan province, china
文献类型：期刊论文
| 作者 | Ye Lin1; Gao Wei1,2; Cheng Zengtao1,2; Yang Yulong1,2; Tao Yan1 |
| 刊名 | Acta geologica sinica-english edition
 |
| 出版日期 | 2010 |
| 卷号 | 84期号:6页码:1488-1499 |
| 关键词 | A-type granite U-pb age Muchang alkali granite Tectonic setting Evolution of tethys in southern sanjiang area |
| ISSN号 | 1000-9515 |
| DOI | 10.1111/j.1755-6724.2010.00343.x |
| 通讯作者 | Ye lin(yelin@vip.gyig.ac.cn) |
| 英文摘要 | The muchang composite intrusion is located about 14 km southeast of the fengwei town and south of the baoshan-zhenkang block. the rift-related intrusion consists of the early-stage riebeckite nordmarkite in the east and west sides and the discontinuous marginal zone, the late-stage main body of dominant riebeckite granite, and minor aegirine granite. studies on petrological geochemistry and la-icp-ms zircon u-pb dating of the late-stage riebeckite granite, origin and evolution of the muchang alkali granite and the relationship between the granite and the associated skarn-type luziyuan pb-zn deposit are discussed in this paper. the results show that the muchang alkali granites belong to a-type granites, which are characterized by enrichment in al2o3, sio2, total alkali and fe, depletion in mgo and cao contents with high feot/mgo ratios. the ree concentrations are relatively high, exhibiting highly fractionated lree patterns with significantly eu negative anomaly. the muchang granites are obviously enriched in lithophile elements (e.g., rb, k, u and th) and high field strength elements (e.g., zr, hf, nb, y and ga) with high 10000xga/al ratios and depleted in sr, ba, ti, cr and ni, which are similar to those of the a-type granites and quite different from those of s-type and i-type granites. the la-icp-ms zircon dating results of the muchang granite gave a weighted mean age of 266.2 +/- 5.4 ma (2 sigma), suggesting that they were formed in the stage of extension at the end of post-collision at middle permian and the consumption of paleo-tethys ocean took place before 266 ma. it is suggested that the unexposed intermediate-acid intrusive rocks in the luziyuan ore district, which is the "sister" rocks material of the muchang granites and related closely to luziyuan pb-zn mineralization, were the product of middle permian. |
| WOS关键词 | A-TYPE GRANITES ; SOUTHEASTERN AUSTRALIA ; PETROGENESIS ; ORIGIN ; AGE ; MAGMAS ; MANTLE ; ROCKS ; DISCRIMINATION ; CONSTRAINTS |
| WOS研究方向 | Geology |
| WOS类目 | Geosciences, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000285753000015 |
| 出版者 | WILEY-BLACKWELL |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2415268 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Ye Lin |
| 作者单位 | 1.Chinese Acad Sci, Inst Geochem, State Key Lab Ore Deposit Geochem, Guiyang 550002, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ye Lin,Gao Wei,Cheng Zengtao,et al. La-icp-ms zircon u-pb geochronology and petrology of the muchang alkali granite, zhenkang county, western yunnan province, china[J]. Acta geologica sinica-english edition,2010,84(6):1488-1499. |
| APA | Ye Lin,Gao Wei,Cheng Zengtao,Yang Yulong,&Tao Yan.(2010).La-icp-ms zircon u-pb geochronology and petrology of the muchang alkali granite, zhenkang county, western yunnan province, china.Acta geologica sinica-english edition,84(6),1488-1499. |
| MLA | Ye Lin,et al."La-icp-ms zircon u-pb geochronology and petrology of the muchang alkali granite, zhenkang county, western yunnan province, china".Acta geologica sinica-english edition 84.6(2010):1488-1499. |
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来源：中国科学院大学
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