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Petrogenesis of Sn-W mineralized granites in the Dawei and Mawchi, regions of Myanmar

文献类型：期刊论文

作者Myint, Aung Zaw3,9,10; Cai, Yue1,2,7,8; Robb, Laurence5,6; Yonezu, Kotaro4
刊名GEOLOGICAL JOURNAL
出版日期2024
页码13
关键词fractional crystallization Nd-Hf and Pb isotope partial melting petrogenesis Sn-W-mineralized granites
ISSN号0072-1050
DOI10.1002/gj.4918
通讯作者Myint, Aung Zaw(aungzawmyint.myanmar@gmail.com) ; Cai, Yue(cai@nigpas.ac.cn)
英文摘要The Palaeocene granites of Dawei and the Eocene granites of Mawchi both host large- to medium-scale Sn-W deposits and represent two metallogenically prominent segments of the SE Asian tin belt in Myanmar. Combined with previous geochemical data, new whole-rock elemental and isotope analyses of tin-mineralized granites were obtained to provide insights into sources involved in the formation of these granites. Tin granites in both regions are highly siliceous (76-80 wt%), peraluminous (A/CNK = 1.02-1.32), depleted in Sr, Ba, Zr and Ti but elevated in Li, Sn, Rb, Pb and U. The highly evolved nature of these granites is emphasized by their high Y/Ho (33-49) ratios as well as low Nb/Ta (1-11) and Zr/Hf (8-24) ratios. The chondrite-normalized REE patterns, with M-type tetrad effects (TE1,3 = 1.04-1.16) and strongly negative Eu anomalies (0.01-0.34), point to fractional crystallization of feldspars and other accessories during the evolution of the parental magma and are also indicative of the magmatic to hydrothermal transition that resulted in the pervasive mineralization of these bodies. The Pb isotopic compositions are variably enriched, with age-corrected Pb-206/Pb-204, Pb-207/Pb-204 and Pb-208/Pb-204 values ranging from 18.620 to 18.898, 15.728 to 15.770, and 38.288 to 39.402, respectively, all of which point to derivation from evolved crustal material. This is consistent with their low epsilon(Nd)(t) and epsilon(Hf)(t) values of -10.11 to -11.29, and -5.86 to -8.93, respectively. Collectively, these data suggest that crustal melting, fractional crystallization and late-stage magma-fluid interactions all played important roles in the generation of the tin-mineralized granites of Myanmar.
WOS关键词A-TYPE GRANITES ; ZIRCON U-PB ; SOUTH CHINA IMPLICATIONS ; ND ISOTOPIC COMPOSITION ; TETRAD REE PATTERNS ; LU-HF ; POLYMETALLIC MINERALIZATION ; EASTERN GUANGDONG ; BAERZHE GRANITES ; TUNGSTEN DEPOSIT
WOS研究方向Geology
语种英语
WOS记录号WOS:001134414200001
出版者WILEY
源URL[http://ir.nigpas.ac.cn/handle/332004/42879]  
专题中国科学院南京地质古生物研究所
通讯作者Myint, Aung Zaw; Cai, Yue
作者单位1.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Nanjing 210008, Peoples R China
2.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China
3.East Yangon Univ, Dept Geol, Yangon 11292, Thanlyin, Myanmar
4.Kyushu Univ, Dept Earth Resources Engn, Fukuoka, Japan
5.Univ Johannesburg, CIMERA, Johannesburg, South Africa
6.Univ Oxford, Dept Earth Sci, Oxford, England
7.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Nanjing, Peoples R China
8.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing, Peoples R China
9.Univ Yangon, Dept Geol, Yangon, Myanmar
10.Univ East Yangon, Dept Geol, Yangon, Myanmar
推荐引用方式
GB/T 7714		 Myint, Aung Zaw,Cai, Yue,Robb, Laurence,et al. Petrogenesis of Sn-W mineralized granites in the Dawei and Mawchi, regions of Myanmar[J]. GEOLOGICAL JOURNAL,2024:13.
APA Myint, Aung Zaw,Cai, Yue,Robb, Laurence,&Yonezu, Kotaro.(2024).Petrogenesis of Sn-W mineralized granites in the Dawei and Mawchi, regions of Myanmar.GEOLOGICAL JOURNAL,13.
MLA Myint, Aung Zaw,et al."Petrogenesis of Sn-W mineralized granites in the Dawei and Mawchi, regions of Myanmar".GEOLOGICAL JOURNAL (2024):13.

入库方式： OAI收割

来源：南京地质古生物研究所

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