Insights into salty metamorphic fluid evolution from scapolite in the Trans-North China Orogen: Implication for ore genesis
文献类型：期刊论文
| 作者 | Qiu, Zhengjie1,7; Fan, Hong-Rui2,3,7; Tomkins, Andrew1; Brugger, Joel1; Etschmann, Barbara1; Liu, Xuan4; Xing, Yanlu6; Hu, Yi5 |
| 刊名 | GEOCHIMICA ET COSMOCHIMICA ACTA
 |
| 出版日期 | 2021-01-15 |
| 卷号 | 293页码:256-276 |
| ISSN号 | 0016-7037 |
| 关键词 | Scapolite Cl/Br ratios S-XANES analysis Deep fluid Syn-orogenic hydrothermal ore formation |
| DOI | 10.1016/j.gca.2020.10.030 |
| 英文摘要 | Scapolite is abundant in medium to high grade metamorphic rocks with evaporitic calc-silicate bulk compositions, and because it can be Cl- and SO42- rich, is able to provide a unique view into the evolution of deep brines during orogenic cycles. In the Zhongtiao Mountains, part of the Trans-North China Orogen (TNCO), scapolite occurs in two distinct mineralogical associations; scapolite-I in carbonate-bearing biotite schist and scapolite-II in amphibolites. Initially, metamorphic Cl-rich scapolite-I formed in the schist at low fluid-rock ratio and peak pressure (meionite content = 32-37%, Cl = 2.34-2.75 wt. %). This observation, together with high molar Cl/Br ratios (Cl/Br = 973-2236), implies a halite-bearing evaporitic protolith. During a second stage of scapolite formation in the calc-silicates, rims overgrew scapolite-I with distinct compositions (Me% = 31-32, Cl = 2.64-3.0 wt.%, Cl/Br = 408-892). The lower molar Cl/Br ratios in scapolite-I rims imply that the later fluid was distinctly different to the earlier metamorphic fluid, and may have evolved through a stage of halite saturation induced by phase separation. Halite saturation would drive Br enrichment in the remaining fluid because Cl is preferentially sequestered in halite. Also at this time, amphibolites were subjected to intense open system fluid-rock interactions resulting in formation of scapolite-II (Me% = 30-32, Cl = 2.74-2.97 wt.%, Cl/Br = 291-1426), similar to that of the scapolite-I. S6+/Sigma S ratios in scapolite obtained via synchrotron XANES indicate that equilibration between fluid and scapolite would buffer the fluid to oxidized conditions, with oxygen fugacity (log fO(2)) beyond -15. The scapolitic rocks in this region were thus able to play a key role in controlling the salinity and oxidation state of the deep metamorphic fluid, thereby creating enhanced potential for scavenging of a range of metals within the metamorphic terrane and promoting syn-orogenic hydrothermal ore formation. (C) 2020 Elsevier Ltd. All rights reserved. |
| WOS关键词 | TONGKUANGYU CU DEPOSIT ; S-RICH SCAPOLITE ; T-T EVOLUTION ; LA-ICP-MS ; ZHONGTIAO MOUNTAINS ; GOLD DEPOSITS ; LOWER CRUST ; NOBLE-GAS ; EXPERIMENTAL CALIBRATION ; MICROPROBE ANALYSIS |
| 资助项目 | National Nature Science Foundation of China[41890833] ; National Nature Science Foundation of China[41902080] ; China Scholarship Council (PhD Joint Training Program at Monash University) ; National Postdoctoral Program for Innovative Talents[BX201700236] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| WOS记录号 | WOS:000600550100014 |
| 资助机构 | National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; China Scholarship Council (PhD Joint Training Program at Monash University) ; China Scholarship Council (PhD Joint Training Program at Monash University) ; China Scholarship Council (PhD Joint Training Program at Monash University) ; China Scholarship Council (PhD Joint Training Program at Monash University) ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; China Scholarship Council (PhD Joint Training Program at Monash University) ; China Scholarship Council (PhD Joint Training Program at Monash University) ; China Scholarship Council (PhD Joint Training Program at Monash University) ; China Scholarship Council (PhD Joint Training Program at Monash University) ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; China Scholarship Council (PhD Joint Training Program at Monash University) ; China Scholarship Council (PhD Joint Training Program at Monash University) ; China Scholarship Council (PhD Joint Training Program at Monash University) ; China Scholarship Council (PhD Joint Training Program at Monash University) ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; China Scholarship Council (PhD Joint Training Program at Monash University) ; China Scholarship Council (PhD Joint Training Program at Monash University) ; China Scholarship Council (PhD Joint Training Program at Monash University) ; China Scholarship Council (PhD Joint Training Program at Monash University) ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/99902]  |
| 专题 | 地质与地球物理研究所_中国科学院矿产资源研究重点实验室 |
| 通讯作者 | Fan, Hong-Rui |
| 作者单位 | 1.Monash Univ, Sch Earth Atmosphere & Environm, Clayton, Vic 3800, Australia 2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China 3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 4.Univ Lorraine, GeoRessources Lab, CNRS, F-54500 Vandoeuvre Les Nancy, France 5.James Cook Univ, Adv Analyt Ctr, Townsville, Qld 4811, Australia 6.Univ Minnesota, Sch Earth & Environm Sci, Minneapolis, MN 55455 USA 7.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qiu, Zhengjie,Fan, Hong-Rui,Tomkins, Andrew,et al. Insights into salty metamorphic fluid evolution from scapolite in the Trans-North China Orogen: Implication for ore genesis[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2021,293:256-276. |
| APA | Qiu, Zhengjie.,Fan, Hong-Rui.,Tomkins, Andrew.,Brugger, Joel.,Etschmann, Barbara.,...&Hu, Yi.(2021).Insights into salty metamorphic fluid evolution from scapolite in the Trans-North China Orogen: Implication for ore genesis.GEOCHIMICA ET COSMOCHIMICA ACTA,293,256-276. |
| MLA | Qiu, Zhengjie,et al."Insights into salty metamorphic fluid evolution from scapolite in the Trans-North China Orogen: Implication for ore genesis".GEOCHIMICA ET COSMOCHIMICA ACTA 293(2021):256-276. |
入库方式： OAI收割
来源：地质与地球物理研究所
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