Titanian clinohumite-gamet-pyroxene rock from the Su-Lu UHP metamorphic terrane, China: chemical evolution and tectonic implications
文献类型：期刊论文
| 作者 | Yang, JJ |
| 刊名 | LITHOS
 |
| 出版日期 | 2003-10-01 |
| 卷号 | 70期号:3-4页码:359-379 |
| 关键词 | titanian clinohumite garnet-pyroxene rock metagabbro metasomatism Ultrahigh-pressure Su-Lu terrane |
| ISSN号 | 0024-4937 |
| DOI | 10.1016/S0024-4937(03)00106-3 |
| 英文摘要 | A garnet-pyroxene rock containing abundant Ti-clinohumite (ca. 40 vol.%) occurs along with eclogites as small blocks in quartzo-feldsparthic gneiss in the southern end of the Chinese Su-Lu ultrahigh-pressure (UHP) metamorphic terrane. It consists of three aggregates: (1) Ti-clinohumite-dominated aggregate with interstitial garnet and pyroxene, (2) garnet + pyroxene aggregate with Ti-clinohumite inclusions, and (3) Ti-clinohumite-free aggregate dominated by garnet. Apatite, phlogopite, zircon, hematite, pentlandite, and an unknown Ni-Fe-volatile-Si (NFVS) mineral, which is replaced by Ni-greenalite, occur as accessories. Serpentine is the major secondary mineral. Garnet (Pro(63.9-64.6)Alm(25.8-26.9)Grs(1.4-7.9)Uva(0.5-7.6)Sps(1.0)) in all three aggregates is pyrope-rich with very low grossular component, with that in the aggregate (2) most enriched in Cr (Cr2O3 = 2.55 wt.%). Orthopyroxene is depleted in Al (Al2O3 = 0.16 wt.% in the cores) and Ca (CaO = 0.06-0.09 wt.% in the cores), with X-Mg (Mg/(Mg + Fe)) values at ca. 0.900. Clinopyroxene is chromian diopside with Fe3+ greater than or equal to Fe2+. Matrix clinopyroxene has a lower X-Mg (0.862) than that (0.887) included in Ti-clinohumite. The rock contains modest amount of heavy rare earth elements (HREE) (10 to 12 x C1 chondrite), with significant enrichment in Cr, Co, Ni, V, Sr, and light rare earth elements (LREE) (22 to 33 x C1 chondrite). The clinopyroxene is very enriched in Cr (Cr2O3 is up to 2.09 wt.% in the cores) and Sr (ca. 350 ppm) and LREE (Ce-N/Yb-N = 157.7). Ti-clinohumite is enriched in Ni (1981 ppm), Co (123 ppm), and Nb (85 ppm). |
| 语种 | 英语 |
| WOS记录号 | WOS:000186356500016 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/78755]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Yang, JJ |
| 作者单位 | 1.NW Univ Xian, Dept Geol, Key Lab Continental Dynam, Xian 710069, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, LTE Lab, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, JJ. Titanian clinohumite-gamet-pyroxene rock from the Su-Lu UHP metamorphic terrane, China: chemical evolution and tectonic implications[J]. LITHOS,2003,70(3-4):359-379. |
| APA | Yang, JJ.(2003).Titanian clinohumite-gamet-pyroxene rock from the Su-Lu UHP metamorphic terrane, China: chemical evolution and tectonic implications.LITHOS,70(3-4),359-379. |
| MLA | Yang, JJ."Titanian clinohumite-gamet-pyroxene rock from the Su-Lu UHP metamorphic terrane, China: chemical evolution and tectonic implications".LITHOS 70.3-4(2003):359-379. |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。