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

doi:10.1002/gj.4918

NIGPAS OpenIR

	Petrogenesis of Sn-W mineralized granites in the Dawei and Mawchi, regions of Myanmar
通讯作者	Myint, Aung Zaw(aungzawmyint.myanmar@gmail.com) ; Cai, Yue(cai@nigpas.ac.cn)
	Myint, Aung Zaw 1,2,8; Cai, Yue 3,4,9,10; Robb, Laurence 5,6; Yonezu, Kotaro 7
	2024
发表期刊	GEOLOGICAL JOURNAL
ISSN	0072-1050
页码	13
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.
关键词	fractional crystallization Nd-Hf and Pb isotope partial melting petrogenesis Sn-W-mineralized granites
DOI	10.1002/gj.4918
收录类别	SCI
语种	英语
关键词[WOS]	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
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:001134414200001
出版者	WILEY
文献类型	期刊论文
条目标识符	http://ir.nigpas.ac.cn/handle/332004/42880
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.Univ East Yangon, Dept Geol, Yangon, Myanmar 2.Univ Yangon, Dept Geol, Yangon, Myanmar 3.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing, Peoples R China 4.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Nanjing, Peoples R China 5.Univ Oxford, Dept Earth Sci, Oxford, England 6.Univ Johannesburg, CIMERA, Johannesburg, South Africa 7.Kyushu Univ, Dept Earth Resources Engn, Fukuoka, Japan 8.East Yangon Univ, Dept Geol, Yangon 11292, Thanlyin, Myanmar 9.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China 10.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Nanjing 210008, Peoples R China
通讯作者单位	中国科学院南京地质古生物研究所
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.

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