Crystallisation conditions (t, p, fo(2)) from mineral chemistry of cu- and au-mineralised alkaline intrusions in the red river-jinshajiang alkaline igneous belt, western yunnan province, china
文献类型：期刊论文
| 作者 | Bi Xianwu1; Hu Ruizhong1; Hanley, J. J.2; Mungall, J. E.2; Peng Jiantang1; Shang Linbo1; Wu Kaixing1,3; Suang Yan1,3; Li Hongli1,3; Hu Xiaoyan1,3 |
| 刊名 | Mineralogy and petrology
 |
| 出版日期 | 2009-05-01 |
| 卷号 | 96期号:1-2页码:43-58 |
| ISSN号 | 0930-0708 |
| DOI | 10.1007/s00710-009-0047-4 |
| 通讯作者 | Bi xianwu(bixianwu@vip.gyig.ac.cn) |
| 英文摘要 | The oligocene yao'an syenite porphyry, associated with gold mineralisation, and the machangqing alkali granite porphyry-monzonite porphyry, associated with cu mineralisation, belong to the red river-jinshajiang alkaline igneous belt that formed in a continental setting in southwestern china. a study of the mineral chemistry of major silicate minerals in these two mineralised intrusions provides insights into their overall crystallisation conditions. the temperature and pressure conditions, derived from amphibole-plagioclase and perthite-plagioclase geothermometry and al-in-amphibole barometry, suggest that the yao'an intrusion crystallised at around 820 +/- 50a degrees c and 0.9-1.3 kbar, whereas the machangqing intrusion crystallised at around 730 a +/- 50a degrees c and 2.2-2.8 kbar. the higher temperature and lower pressure of crystallisation for the yao'an intrusion relative to the machangqing intrusion indicates that it was emplaced at a shallower crustal level. based on biotite composition, the two intrusions formed under imposed oxygen fugacities above the ni-nio buffer (nno), and the yao'an intrusion crystallised under more oxidising conditions than the machangqing intrusion. the results show that the intrusions associated with cu-au mineralisation in the red river-jinshajiang alkaline igneous belt were emplaced at a relatively high fo(2), which, together with the weakly fractionated magma, favoured au enrichment relative to cu in the belt. |
| WOS关键词 | PORPHYRY COPPER-DEPOSITS ; IN-HORNBLENDE BAROMETER ; SHEAR ZONE ; MO MINERALIZATION ; EASTERN TIBET ; GOLD DEPOSITS ; BIOTITE ; ROCKS ; EVOLUTION ; AMPHIBOLE |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| WOS类目 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:000264852100003 |
| 出版者 | SPRINGER WIEN |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2401580 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Bi Xianwu |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Ore Geochem, Inst Geochem, Guiyang 550002, Peoples R China 2.Univ Toronto, Dept Geol, Toronto, ON M5S 3B1, Canada 3.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Bi Xianwu,Hu Ruizhong,Hanley, J. J.,et al. Crystallisation conditions (t, p, fo(2)) from mineral chemistry of cu- and au-mineralised alkaline intrusions in the red river-jinshajiang alkaline igneous belt, western yunnan province, china[J]. Mineralogy and petrology,2009,96(1-2):43-58. |
| APA | Bi Xianwu.,Hu Ruizhong.,Hanley, J. J..,Mungall, J. E..,Peng Jiantang.,...&Hu Xiaoyan.(2009).Crystallisation conditions (t, p, fo(2)) from mineral chemistry of cu- and au-mineralised alkaline intrusions in the red river-jinshajiang alkaline igneous belt, western yunnan province, china.Mineralogy and petrology,96(1-2),43-58. |
| MLA | Bi Xianwu,et al."Crystallisation conditions (t, p, fo(2)) from mineral chemistry of cu- and au-mineralised alkaline intrusions in the red river-jinshajiang alkaline igneous belt, western yunnan province, china".Mineralogy and petrology 96.1-2(2009):43-58. |
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来源：中国科学院大学
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