Cenozoic intraplate volcanism in central Asia: Mantle upwelling induced by India-Eurasia collision
文献类型：期刊论文
| 作者 | Wang, Jian1,2,3,4; Su, Yuping1,3,4; Zheng, Jianping3; Dai, Hongkun1,3,4; Tang, Gongjian2; Ma, Qiang3; Zhao, Junhong3; Belousova, Elena1,4,5; Griffin, William L.1,4; O'Reilly, Suzanne Y.1,4 |
| 刊名 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN
 |
| 出版日期 | 2023-07-01 |
| 卷号 | 135期号:7-8页码:1923-1938 |
| ISSN号 | 0016-7606 |
| DOI | 10.1130/B36545.1 |
| 英文摘要 | Most of Earth's volcanism occurs at tec-tonic plate boundaries associated with sub-duction or rifting processes. The mantle plume hypothesis is an important supple-ment to plate tectonics for explaining some high-volume intraplate volcanic fields. How-ever, many intraplate magmatic provinces occur as low-volume, monogenetic basaltic -suite fields that are neither associated with plate-boundary processes nor attributable to mantle plumes, and the origin of such mag-matism has long been debated. Identification of their source characteristics and possible mechanisms that trigger mantle melting will provide essential insights into Earth's mantle heterogeneity and also develop our knowl-edge of tectonic plate movement through time. Here, we report new geochronology, mineral chemistry (especially olivine), and whole-rock chemical and Sr-Nd-Pb-Hf isoto-pic compositions on Cenozoic intracontinen-tal alkaline basalts from the northwestern Tarim craton (central Asia), aiming to better assess the origin of Earth's low-volume effu-sive intraplate volcanic fields. The basalts (ca. 42 Ma) have olivine (e.g., mean Ni abundances of -2250 ppm, mean Mn/Zn ratios of 13.7) and whole-rock chemistry consistent with their derivation from a mixed peridotite-py-roxenite source. Moderately depleted Sr-Nd-Pb-Hf isotopes (87Sr/86Sr = 0.7039-0.7053; & epsilon;Nd = +4.0 to +5.5; 206Pb/204Pb = 18.247-18.535; & epsilon;Hf = +8.1 to +8.7) require a young (ca. 500 Ma) oceanic crust recycled into the source, possibly related to subduction events during the assembly of Pangea. Estimated thermal-chemical conditions indicate that the original melting occurred in a relatively dry (H2O = 1.4 & PLUSMN; 0.9 wt%) and reduced (logfO2 & UDelta;FMQ = -0.97 & PLUSMN; 0.21, where FMQ is fayalite-magnetite-quartz) asthenosphere under a mantle potential temperature of -1420 & DEG;C and a pressure of -3.7 GPa (corre-sponding to a depth of -120 km). Combining these data with regional tectonic history and geophysical data (high-resolution P-wave tomography), we propose that the long-lasting India-Eurasia collision triggered asthenospheric upwelling, focusing melts along translithospheric zones of weakness; this model provides a robust explanation for the observed Cenozoic intracontinental vol-canism in central Asia. The integrated geo-chemical and geophysical evidence reveals that plate subduction-induced mantle up -welling represents a likely mechanism for the generation of many regions of plume-absent intraplate magmatism within continents. |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001051785100003 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/74686]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 通讯作者 | Su, Yuping |
| 作者单位 | 1.Macquarie Univ, ARC Natl Key Ctr Geochem Evolut & Metallogeny Cont, Nat Sci, Sydney, NSW 2109, Australia 2.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China 3.China Univ Geosci, Sch Earth Sci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China 4.Macquarie Univ, Australian Res Council ARC Ctr Excellence Core Cru, Nat Sci, Sydney, NSW 2109, Australia 5.Geol Survey Queensland, Dept Resources, Brisbane, Qld 4000, Australia |
| 推荐引用方式 GB/T 7714 | Wang, Jian,Su, Yuping,Zheng, Jianping,et al. Cenozoic intraplate volcanism in central Asia: Mantle upwelling induced by India-Eurasia collision[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2023,135(7-8):1923-1938. |
| APA | Wang, Jian.,Su, Yuping.,Zheng, Jianping.,Dai, Hongkun.,Tang, Gongjian.,...&O'Reilly, Suzanne Y..(2023).Cenozoic intraplate volcanism in central Asia: Mantle upwelling induced by India-Eurasia collision.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,135(7-8),1923-1938. |
| MLA | Wang, Jian,et al."Cenozoic intraplate volcanism in central Asia: Mantle upwelling induced by India-Eurasia collision".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 135.7-8(2023):1923-1938. |
入库方式： OAI收割
来源：广州地球化学研究所
浏览0
下载0
收藏0
其他版本
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。