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

doi:10.1002/gj.4918

	Petrogenesis of Sn-W mineralized granites in the Dawei and Mawchi, regions of Myanmar
	Myint, Aung Zaw 3,9,10; Cai, Yue 1,2,7,8; Robb, Laurence 5,6; Yonezu, Kotaro 4
刊名	GEOLOGICAL JOURNAL
	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
DOI	10.1002/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
出版者	WILEY
WOS记录号	WOS:001134414200001
内容类型	期刊论文
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.