Syn-tectonic fluids decoding effects of tectono-metamorphic cycles on regional metallogenic evolution of the Chinese Altai, central Asia
文献类型：期刊论文
| 作者 | Xiao, Ming1,2; Jiang, Yingde1 ; Zhao, Guochun2,3; Yuan, Chao1,2; Cai, Yue4; Qiu, Huaning5,6,7; Hao, Lulu1,2; Zhang, Wanfeng1,2; Kong, Lingzhu1,2
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| 刊名 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN
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| 出版日期 | 2024-03-01 |
| 卷号 | 136期号:3-4页码:1469-1487 |
| ISSN号 | 0016-7606 |
| DOI | 10.1130/B36903.1. |
| 英文摘要 | Despite their close temporal and spatial relationships, the effects of tectono-thermal events on ore formation remain obscure. To better understand this process, a comprehensive geochemical investigation on paleofluids from syn-tectonic felsic and quartz veins associated with the Devonian subduction and Permian collision of the Chinese Altai was conducted. We found that the Devonian fluids were organic alkanes-CO2-S-Ca-Mg-rich saline fluids with variable CO2/CH4 (0.09-5.03) and lower F-/SO42- (0.02-0.14) and Al3+/Mg2+ (0-0.11) ratios, whereas the Permian fluids were immiscible fluids including CO2-C4H10-CO-rich oxidized gas bubbles and CH4-C3H8-C2H6-Ca-Na-K-Al-S-Cl-F-rich reduced saline fluids with lower CO2/CH4 (0-1.31, mostly <1) and higher F-/SO42- (0.21-0.76) and Al3+/Mg2+ (0.10-2.56) ratios. The Devonian and Permian fluids also have similar delta C-13-CO2 values of -23.8 parts per thousand to -3.5 parts per thousand and -16.5 parts per thousand to -3.7 parts per thousand, respectively. These data suggest that both fluids derived mainly from devolatilization and dehydration melting of metasediments; the Permian fluids likely involve more biotite melting in the deeper crust and more mantle-derived components, whereas the Devonian fluids contain more meteoric components. Base metal-dominated Devonian mineralization occurred as deep-sourced organic matter- and S-rich fluids promoted base metal migration, whereas the relatively oxidized fluid conditions inhibited the mineralization of many other metals. By contrast, the more reduced and F-rich Permian fluids with more mantle contributions facilitated the extraction of Au and uptakes of rare metals from reworked metasediments and promoted their mineralization. These findings provide a more complete picture of how tectono-thermal events fertilize the crust and demonstrate that syn-tectonic fluids can serve as proxies for metallogenic processes during orogenic cycles in general. |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001187125300008 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/77157]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 通讯作者 | Jiang, Yingde |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China 3.Univ Hong Kong, Dept Earth Sci, Pokfulam Rd, Hong Kong, Peoples R China 4.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Northern Taibai St 229, Xian 710069, Peoples R China 5.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Ctr Excellence Life & Paleoenvironment, State Key Lab Palaeobiol & Strat, Nanjing 210008, Peoples R China 6.China Univ Geosci Wuhan, Key Lab Tecton & Petr Resources, Minist Educ, Wuhan 430074, Peoples R China 7.China Univ Geosci, Sch Earth Resources, Wuhan 430074, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xiao, Ming,Jiang, Yingde,Zhao, Guochun,et al. Syn-tectonic fluids decoding effects of tectono-metamorphic cycles on regional metallogenic evolution of the Chinese Altai, central Asia[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2024,136(3-4):1469-1487. |
| APA | Xiao, Ming.,Jiang, Yingde.,Zhao, Guochun.,Yuan, Chao.,Cai, Yue.,...&Kong, Lingzhu.(2024).Syn-tectonic fluids decoding effects of tectono-metamorphic cycles on regional metallogenic evolution of the Chinese Altai, central Asia.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,136(3-4),1469-1487. |
| MLA | Xiao, Ming,et al."Syn-tectonic fluids decoding effects of tectono-metamorphic cycles on regional metallogenic evolution of the Chinese Altai, central Asia".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 136.3-4(2024):1469-1487. |
入库方式： OAI收割
来源：广州地球化学研究所
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