Geochronological and geochemical study on the Yulong porphyry copper ore belt in eastern Tibet, China
文献类型：会议论文
| 作者 | Liang HY; Zhang YQ; Xie YW; Lin W; Campbell IH; Yu HX |
| 出版日期 | 2005-08-18 |
| 会议日期 | 2005-8-18 |
| 会议地点 | Beijing, PEOPLES R CHINA |
| 英文摘要 | The Yulong copper belt, along part of the Red River-Ailao Shan fault system and its northwestern extension in eastern Tibet, consists of five porphyry pipes that contain a total copper resource of over 8 million tons. The porphyries are characterized by high alkali content (K2O+Na2O > 6%), K2O/Na2O > 1, and marked negative Ti, Ta and Nb anomalies on mantle-normalized incompatible element diagrams. U-Th-Pb laser ICP-MS dating of zircons from the Yulong porphyries showed that they were emplaced over a 4.3 Ma period and that they Young systematically from northwest to southeast as follows: Yulong, 41.2 +/- 0.2Ma; Zalaga, 38.5 +/- 0.2Ma; Mangzong, 37.6 +/- 0.2 Ma; Duoxiasongduo, 37.5 +/- 0.2Ma; and Malasongduo, 36.9 +/- 0.4 Ma. We suggest that the source of the shoshonites was lower crust that was pushed into the mantle by the compressive component of transpressional movement on the adjacent Tuoba-Mangkang fault and that the compositional variation in the porphyries is due to mixing between magmas of different composition, generated by different degrees of partial melting of a heterogeneous source region. |
| 会议录 | 8th Biennial SGA Meeting
 |
| 语种 | 英语 |
| 源URL | [http://210.77.94.230:8080/handle/344008/9397]  |
| 专题 | 广州地球化学研究所_中科院广州地化所(-2008) |
| 推荐引用方式 GB/T 7714 | Liang HY,Zhang YQ,Xie YW,et al. Geochronological and geochemical study on the Yulong porphyry copper ore belt in eastern Tibet, China[C]. 见:. Beijing, PEOPLES R CHINA. 2005-8-18. |
入库方式： OAI收割
来源：广州地球化学研究所
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