IOCAS-IR  > 深海极端环境与生命过程研究中心
Unraveling the link between mantle upwelling and formation of Sn-bearing granitic rocks in the world-class Dachang tin district, South China
Guo, Jia1,2; Wu, Kai3; Seltmann, Reimar4; Zhang, Rongqing5; Ling, Mingxing6; Li, Congying2; Sun, Weidong2
2022-03-01
发表期刊GEOLOGICAL SOCIETY OF AMERICA BULLETIN
ISSN0016-7606
卷号134期号:3-4页码:1043-1064
通讯作者Zhang, Rongqing(rqzhang@nju.edu.cn)
摘要Increasing evidence shows that the man-tle contributes (directly or indirectly) to Sn-bearing granites worldwide. However, the specific role of mantle in the formation of tin granites and related mineralization remains poorly understood. In the world-class Dachang district, South China, tin mineralization is related to the Longxiang-gai equigranular/porphyritic biotite granites and tin orebodies are cut by granite por-phyry dykes hosting mafic microgranular enclaves (MMEs). A combination of zircon U-Pb dating and Hf-O isotopes, mineral chemistry, and whole-rock elemental and Sr-Nd isotopic compositions-for granitic rocks and MMEs, is employed to constrain the petrogenesis and to unravel the link between tin fertility and mantle upwell-ing. Laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) zircon U-Pb dating indicates that the biotite granites were emplaced at ca. 93 Ma, and the granite porphyry dykes and MMEs were formed at ca. 86 Ma. The biotite granites are silica-and alkali-enriched with A/CNK ratios of 1.04-1.36, and exhibit elevated con-centrations of Li, F, P, Rb, Cs, Ta, Sn, W, and U, showing affinities with highly fraction-ated S-type granites. Whole-rock geochemi-cal and Nd isotopic (epsilon(Nd)(t) = -10.0 to -7.8) data, and in situ zircon Hf-O (epsilon(Hf)(t) = -9.9 to -3.9, delta O-18 = 6.2-8.9%0) isotopes indicate that the biotite granites were formed by partial melting of metasedimentary rocks at relatively high temperatures (>= 782 degrees C), possibly with minor input of mantle mate-rial. Likewise, the post-ore granite porphyry dykes have similar chemical and mineral-ogical characteristics as fractionated S-type granites. Zircon Hf-O isotopes (epsilon(Hf)(t) = -9.0 to -4.9, delta O-18 = 6.5-8.2 parts per thousand) and whole-rock geochemical data suggest they were derived from a similar source as the biotite granites, whereas elevated epsilon(Nd)(t) values of -5.0 to -3.3 for granite porphyry dykes relative to biotite granites reveal an increasing mantle input. Distinct epsilon(Nd)(t) (-0.4 and -0.3) and zircon Hf-O (epsilon Hf(t) = 1.5-5.0, delta O-18 = 6.5-7.2 parts per thousand) iso-topes of the MMEs, suggest that the mafic melt could be sourced from the astheno-spheric mantle, contaminated by subconti-nental lithospheric mantle/continental crust during magma ascent, and hybridized by fel -sic melt at emplacement-level. The magmatic sequence in the Dachang district is indica-tive of an extensional tectonic setting where mantle-derived magmas are predicted to mi-grate to shallower crustal levels as the crust progressively becomes thinner and hotter. High-temperature partial melting of mature metasedimentary crust triggered by heat in-put from the upwelled mantle, may contrib-ute to biotite breakdown, which is important for concentrating tin in melts. Fractional crystallization of initially Sn-rich felsic melts under reduced conditions makes further tin enrichment and produces Sn-bearing gran-ites (the Longxianggai pluton). Prolonged mantle upwelling results in distinct magma mixing and the formation of granite por-phyry dykes and MMEs. These dykes are highly fractionated with elevated Sn and W contents, which show great potential to form hydrothermal Sn-W mineralization.
DOI10.1130/B35492.1
收录类别SCI
语种英语
资助项目National Key Research and Development Program of China[2016YFC0600408] ; Youth Innovation Promotion Association CAS[2016315] ; National Natural Science Foundation of China[41702092] ; Everest Scientific Research Program[2020ZF11413] ; joint patronage of the International Union of Geological Sciences and United Nations Educational, Scientific and Cultural Organization[662]
WOS研究方向Geology
WOS类目Geosciences, Multidisciplinary
WOS记录号WOS:000765012000003
出版者GEOLOGICAL SOC AMER, INC
引用统计
被引频次:21[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.qdio.ac.cn/handle/337002/178463
专题深海极端环境与生命过程研究中心
通讯作者Zhang, Rongqing
作者单位1.Chengdu Univ Technol, Coll Earth Sci, Chengdu 610059, Peoples R China
2.Chinese Acad Sci, Ctr Deep Sea Res, Inst Oceanol, Qingdao 266071, Peoples R China
3.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Xian 710069, Peoples R China
4.Nat Hist Museum, Dept Earth Sci, Cromwell Rd, London SW7 5BD, England
5.Nanjing Univ, Sch Earth Sci & Engn, State Key Lab Mineral Deposits Res, Nanjing 210023, Peoples R China
6.East China Univ Technol, State Key Lab Nucl Resources & Environm, Nanchang 330013, Jiangxi, Peoples R China
第一作者单位中国科学院海洋研究所
推荐引用方式
GB/T 7714
Guo, Jia,Wu, Kai,Seltmann, Reimar,et al. Unraveling the link between mantle upwelling and formation of Sn-bearing granitic rocks in the world-class Dachang tin district, South China[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2022,134(3-4):1043-1064.
APA Guo, Jia.,Wu, Kai.,Seltmann, Reimar.,Zhang, Rongqing.,Ling, Mingxing.,...&Sun, Weidong.(2022).Unraveling the link between mantle upwelling and formation of Sn-bearing granitic rocks in the world-class Dachang tin district, South China.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,134(3-4),1043-1064.
MLA Guo, Jia,et al."Unraveling the link between mantle upwelling and formation of Sn-bearing granitic rocks in the world-class Dachang tin district, South China".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 134.3-4(2022):1043-1064.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
B35492_SuppMat.pdf(633KB)期刊论文出版稿限制开放CC BY-NC-SA浏览
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Guo, Jia]的文章
[Wu, Kai]的文章
[Seltmann, Reimar]的文章
百度学术
百度学术中相似的文章
[Guo, Jia]的文章
[Wu, Kai]的文章
[Seltmann, Reimar]的文章
必应学术
必应学术中相似的文章
[Guo, Jia]的文章
[Wu, Kai]的文章
[Seltmann, Reimar]的文章
相关权益政策
暂无数据
收藏/分享
文件名: B35492_SuppMat.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。