Petrological and geochemical constraints of mantle peridotites on the magma-starved Yap Arc formed by ultra-slow subduction
文献类型：期刊论文
| 作者 | Yao, Junhua1,2; Zhang, Guoliang1,2; Zhang, Ji1,2; He, De-Feng3 |
| 刊名 | CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
 |
| 出版日期 | 2023-11-01 |
| 卷号 | 178期号:11页码:17 |
| ISSN号 | 0010-7999 |
| 关键词 | Ultra-slow subduction Oceanic plateau subduction Mantle peridotites Mineralogy Magma-starved Yap Arc |
| DOI | 10.1007/s00410-023-02056-2 |
| 通讯作者 | Zhang, Guoliang(zhangguoliang@qdio.ac.cn) |
| 英文摘要 | Oceanic plateaus inevitably interact with trench-arc systems during oceanic subduction, but the subduction mechanisms are poorly understood. The Yap trench-arc system is an important part of the western Pacific subduction zone, and is undergoing ultra-slow subduction of the Caroline Plateau. As such, it is ideal for investigating the magmatic-tectonic processes of oceanic plateau subduction. In this study, we document the mineralogy and geochemistry of serpentinized peridotites from the Yap-Mariana Junction. These peridotites can be subdivided into two groups. Group I samples have intermediate to high whole-rock CaO contents and Al2O3/SiO2 values, low chromite Cr# (as low as 0.16) and high chromite Ga/Fe3+# values, and low pyroxene Mg# values relative to Mariana Forearc peridotites. These features are consistent with those of abyssal peridotites. Based on La/Sm ratios, two types of clinopyroxene are identified in group 1 samples. Melting models show that the light rare earth element (LREE)-depleted patterns of type 1 clinopyroxene can be produced by similar to 5% fractional melting or similar to 6% open-system melting of depleted upper mantle, while the nearly flat REE patterns of type 2 clinopyroxene are related to LREE-enriched melts. These clinopyroxene compositions record melt impregnation and reactions in the mantle beneath the Yap-Mariana Junction. In contrast, group 2 samples have similar compositions to forearc peridotites, such as low whole-rock Al2O3/SiO2 values, and high chromite Cr# (up to 0.73) and low chromite Ga/Fe3+# values. The different trends in plots of chromite Cr#-TiO2 and 100Ti/Fe3+#-Ga/Fe3+# indicate that the group 1 samples experienced reactions with mid-ocean ridge basalt-like melts, whereas the group 2 samples experienced reactions with island arc tholeiite-like melts. The Mg#, TiO2, and Al2O3 values of the melts in equilibrium with chromite in the group 1 samples are consistent with those of the Parece Vela Basin basalts, while those from group 2 samples define a compositional trend similar to arc-related volcanic rocks. Therefore, this region experienced a tectonic transition from a back-arc spreading ridge to a subduction zone. Compared with the Mariana Trench that is undergoing normal oceanic crustal subduction, the absence of volcanic rocks at the Yap Trench are the response to ultra-slow subduction of the Caroline Plateau. |
| WOS关键词 | MARIANA FORE-ARC ; OCEANIC PLATEAUS ; TRACE-ELEMENTS ; CHROMIAN SPINEL ; MELT INCLUSIONS ; ABYSSAL ; BENEATH ; ORIGIN ; OPHIOLITE ; EVOLUTION |
| 资助项目 | NSFC Shiptime Sharing Project[NORC2020-581] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42020302] ; National Natural Science Foundation of China[91858206] ; National Natural Science Foundation of China[42221005] ; National Natural Science Foundation of China[42206051] ; Marine S&T Fund of Shandong Province for Pilot National Laboratory for Marine Science and Technology (Qingdao)[2022QNLM050201-3] ; Natural Science Foundation of Shandong Province[ZR2020MD070] ; Natural Science Foundation of Shandong Province[ZR2022QD027] ; Taishan Scholars Program of Shandong Province[tsqn201909157] |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| 出版者 | SPRINGER |
| WOS记录号 | WOS:001084318600001 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/181631]  |
| 专题 | 海洋研究所_深海极端环境与生命过程研究中心 |
| 通讯作者 | Zhang, Guoliang |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao 266071, Peoples R China 3.Chinese Acad Sci, Inst Geochem, State Key Lab Ore Deposit Geochem, Guiyang 550081, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yao, Junhua,Zhang, Guoliang,Zhang, Ji,et al. Petrological and geochemical constraints of mantle peridotites on the magma-starved Yap Arc formed by ultra-slow subduction[J]. CONTRIBUTIONS TO MINERALOGY AND PETROLOGY,2023,178(11):17. |
| APA | Yao, Junhua,Zhang, Guoliang,Zhang, Ji,&He, De-Feng.(2023).Petrological and geochemical constraints of mantle peridotites on the magma-starved Yap Arc formed by ultra-slow subduction.CONTRIBUTIONS TO MINERALOGY AND PETROLOGY,178(11),17. |
| MLA | Yao, Junhua,et al."Petrological and geochemical constraints of mantle peridotites on the magma-starved Yap Arc formed by ultra-slow subduction".CONTRIBUTIONS TO MINERALOGY AND PETROLOGY 178.11(2023):17. |
入库方式： OAI收割
来源：海洋研究所
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