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| The telescoped porphyry-high sulfidation epithermal Cu(-Au) mineralization of Rongna deposit in Duolong ore cluster at the southern margin of Qiangtang Terrane, Central Tibet: Integrated evidence from geology, hydrothermal alteration and sulfide assemblages | |
| Li GuangMing; Zhang XiaNan; Qin KeZhang; Sun XingGuo; Zhao JunXing; Yin XianBo; Li JinXiang; Yuan HuaShan | |
| 通讯作者 | Li, GM (通讯作者) |
| 发表日期 | 2015 |
| ISSN | 1000-0569 |
| 起始页码 | 2307 |
| 结束页码 | 2324 |
| 卷号 | 31期号:8 |
| 英文摘要 | Rongna telescoped porphyry-high sulfidation epithermal Cu-Au deposit within Duolong ore cluster, located at the southern margin of Qiangtang terrane, is an exploration breakthrough made by Chinalco Tibet Company and No. 5 Geological Party of Tibet Bureau of Geology and Exploration in recent years. Its inferred resource has reached a superlarge scale, but the genetic type is still controversy. Based on detailed geological drills records, combined with the observation of microscope, scanning electron microscope and EPMA analysis of sulfides, it is evident that the ore-forming porphyry is granodiorite porphyry. The ore bodies mainly occur in the Lower-Middle Jurassic Sewa Formation feldspathic quartz sandstone and ore-forming porphyry. The W-E trending blind orebodies dip to the south, and are characterized by great downward extension. The metallic metal is copper, associated with mineralization of Au, Ag, and molybdenite mineralization can be seen seldomly. The hydrothermal alteration has two stages, which is biotitization, hornfelsic alteration, silicification-sericitization, silicification-illitization-chloritization, that are related with porphyry, and telescoped advanced argillic alteration in shallow part. The alteration zones are obvious and they are, respectively, veinlet disseminated mineralization formed by porphyry and the other one which is characterized by enargite induced by high sulfidation epithermal hydrotherm. Cu-Bearing mineral assemblages can be divided into 4 zones, which mainly correspond to alteration zones Bornite-chalcopyrite are major ore minerals in depth, while bornite-covellite in transition area, digenite-tennatite-enargite in upper-middle part and chalcocite-digenite on top. On the whole, mineralization is Cu-S system in shallow part and Cu-Fe-S system in depth. Contrasted with other similar deposits, the characteristic of Rongna's mineralization is rich in zinc and poor in gold. As mentioned above, Rongna is a typical example of telescoped porphyry-high sulfidation epithermal Cu-Au deposit, and the exploration breakthrough supplies an important way for exploration in volcanic rock area and coverage area at southern margin of Qiangtang terrane. |
| 关键词 | CU-AU DEPOSITADVANCED ARGILLIC ALTERATIONBANGONG-NUJIANG SUTURECOPPER-DEPOSITEL-SALVADORTECTONIC EVOLUTIONNORTHWESTERN TIBETAG MINERALIZATIONFLUID INCLUSIONSMARICUNGA BELT |
| 英文关键词 | Porphyry ore deposit; High sulfidation epithermal deposit; Telescoped mineralization; Sulfide assemblages; Rongna; Southern margin of Qiangtang |
| 语种 | 英语 |
| WOS研究方向 | Geology |
| WOS类目 | Geology |
| WOS记录号 | WOS:000361075200013 |
| 来源期刊 | ACTA PETROLOGICA SINICA
 |
| 来源机构 | 中国科学院青藏高原研究所 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/258517 |
| 推荐引用方式 GB/T 7714 | Li GuangMing,Zhang XiaNan,Qin KeZhang,et al. The telescoped porphyry-high sulfidation epithermal Cu(-Au) mineralization of Rongna deposit in Duolong ore cluster at the southern margin of Qiangtang Terrane, Central Tibet: Integrated evidence from geology, hydrothermal alteration and sulfide assemblages[J]. 中国科学院青藏高原研究所,2015,31(8). |
| APA | Li GuangMing.,Zhang XiaNan.,Qin KeZhang.,Sun XingGuo.,Zhao JunXing.,...&Yuan HuaShan.(2015).The telescoped porphyry-high sulfidation epithermal Cu(-Au) mineralization of Rongna deposit in Duolong ore cluster at the southern margin of Qiangtang Terrane, Central Tibet: Integrated evidence from geology, hydrothermal alteration and sulfide assemblages.ACTA PETROLOGICA SINICA,31(8). |
| MLA | Li GuangMing,et al."The telescoped porphyry-high sulfidation epithermal Cu(-Au) mineralization of Rongna deposit in Duolong ore cluster at the southern margin of Qiangtang Terrane, Central Tibet: Integrated evidence from geology, hydrothermal alteration and sulfide assemblages".ACTA PETROLOGICA SINICA 31.8(2015). |
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