CONTRASTING STYLES OF PERALUMINOUS S-TYPE AND I-TYPE GRANITIC MAGMATISM: IDENTIFICATION AND IMPLICATIONS FOR THE ACCRETIONARY HISTORY OF THE CHINESE SOUTH TIANSHAN

doi:10.2475/02.2022.06

GIG OpenIR

	Tao, Zaili 1,2; Yin, Jiyuan 1,3; Xia, Wenjiao 4,5; Seltmann, Reimar 6; Chen, Wen 1; Sun, Min 3; Wang, Tao 1; Yuan, Chao 7; Thomson, Stuart N.8; Chen, Yuelong 2; Xia, Xiaoping 7
	CONTRASTING STYLES OF PERALUMINOUS S-TYPE AND I-TYPE GRANITIC MAGMATISM: IDENTIFICATION AND IMPLICATIONS FOR THE ACCRETIONARY HISTORY OF THE CHINESE SOUTH TIANSHAN
刊名	AMERICAN JOURNAL OF SCIENCE
ISSN号	0002-9599
	2022-02-01
卷号	322 期号:2 页码:280-312
DOI	10.2475/02.2022.06
语种	英语
WOS研究方向	Geology
摘要	Peraluminous granitoids have aluminum saturation indices (A/CNK) higher than 1.0, which overlap to some extent between S- and I-type granitoids. However, their source and petrogenesis are still disputed. For example, whole-rock compositions alone are not always a valid way to discriminate the sources of peraluminous granitoids. To identify the geochemical affinities, source and petrogenesis of the peraluminous granitoids, we present new geochemical data, in situ zircon U-Pb ages and Hf-O isotopic data, and whole-rock Sr-Nd isotopic data for the peraluminous granitoids in the South Tianshan Orogen Belt (STOB), Northwesten China. Zircon U-Pb ages suggest that these peraluminous granitoids were emplaced in the latest Carboniferous (ca. 299 Ma). They contain the diagnostic mineral muscovite and have high delta O-18(Zrn) values (>8.0 %) demonstrating a close affinity with S-type granitoids. Their low epsilon Nd(t) values (-5.3 to -7.6), combined with variable zircon epsilon Hf(t) values (-0.35 to -10.18), indicate that these S-type granitoids were likely derived from partial melting of metasedimentary rocks. In addition, inherited zircon cores from the S-type granitoids have variable delta O-18 values (6.34-10.5 %) and zircon epsilon Hf(t) values (-4.3 to +16.3), with age populations (ca. 400 to 500 Ma) similar to those of detrital zircons from late Carboniferous metasedimentary rocks in the region. These data show that the S-type granitoids were dominantly derived from late Carboniferous metasedimentary rocks rather than Precambrian crustal materials. The studied granitoids have a transitional composition between I- and S-type granitoids, which could be related to low compositional maturity of the late Carboniferous metasedimentary source. According to the spatial and temporal distribution and petrogenesis of the Carboniferous intrusive rocks in the STOB, we propose that a slab rollback model can account for the generation of late Carboniferous S-type granitoids in the STOB.
关键词	Peraluminous granitoids South Tianshan Orogen Belt Metasedimentary rocks Slab roll-back
WOS记录号	WOS:000800658900004
收录类别	SCI
引用统计
文献类型	期刊论文
条目标识符	http://ir.gig.ac.cn/handle/344008/68008
通讯作者	Yin, Jiyuan
作者单位	1.Chinese Acad Geol Sci, Inst Geol, Minist Nat Resources, Key Lab Deep Earth Dynam, Beijing 100037, Peoples R China 2.China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China 3.Univ Hong Kong, Dept Earth Sci, Pokflam Rd, Hong Kong, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 5.Chinese Acad Sci, Xinjiang Res Ctr Mineral Resources, Xinjiang Inst Ecol & Geog, Urumqi 830011, Peoples R China 6.Nat Hist Museum, Dept Earth Sci, Ctr Russian & Cent EurAsian Mineral Studies CERCA, London SW7 5BD, England 7.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China 8.Univ Arizona, Dept Geosci, 1040 E 4th St, Tucson, AZ 85721 USA
推荐引用方式 GB/T 7714	Tao, Zaili,Yin, Jiyuan,Xia, Wenjiao,et al. CONTRASTING STYLES OF PERALUMINOUS S-TYPE AND I-TYPE GRANITIC MAGMATISM: IDENTIFICATION AND IMPLICATIONS FOR THE ACCRETIONARY HISTORY OF THE CHINESE SOUTH TIANSHAN[J]. AMERICAN JOURNAL OF SCIENCE,2022,322(2):280-312.
APA	Tao, Zaili.,Yin, Jiyuan.,Xia, Wenjiao.,Seltmann, Reimar.,Chen, Wen.,...&Xia, Xiaoping.(2022).CONTRASTING STYLES OF PERALUMINOUS S-TYPE AND I-TYPE GRANITIC MAGMATISM: IDENTIFICATION AND IMPLICATIONS FOR THE ACCRETIONARY HISTORY OF THE CHINESE SOUTH TIANSHAN.AMERICAN JOURNAL OF SCIENCE,322(2),280-312.
MLA	Tao, Zaili,et al."CONTRASTING STYLES OF PERALUMINOUS S-TYPE AND I-TYPE GRANITIC MAGMATISM: IDENTIFICATION AND IMPLICATIONS FOR THE ACCRETIONARY HISTORY OF THE CHINESE SOUTH TIANSHAN".AMERICAN JOURNAL OF SCIENCE 322.2(2022):280-312.