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The oxygen isotope composition of mantle eclogites as a proxy of their origin and evolution: A review
Korolev, Nester M.1,2; Melnik, Aleksey E.2,3; Li, Xian-Hua4; Skublov, Sergey G.2,3
2018-10-01
发表期刊EARTH-SCIENCE REVIEWS
ISSN0012-8252
卷号185页码:288-300
摘要In the past decade the oxygen isotope composition in rock-forming minerals of mantle eclogites (delta O-18 = 2-12 parts per thousand) has been actively discussed as a most reliable proxy of their origin and evolution. In the present study, the possibility of using the oxygen isotope composition as a proxy for the origin of mantle eclogites is carefully tested, and conclusions regarding its application limits are drawn. Contributions of all processes leading to variations in the isotope composition from protolith (oceanic crust) formation to ascent of eclogites in kimberlite to the surface are discussed, including hydrothermal alteration by sea water; fractionation of oxygen isotopes upon metamorphism, dehydration and the removal of volatile components in subduction zone; metasomatism in subduction zone; partial melting; mantle metasomatism; and variation in the oxygen isotope composition upon the exhumation of mantle xenoliths by kimberlitic magma. The total contribution of all processes (excluding mantle metasomatism) typically does not exceed a deviation of +/- 3.5 parts per thousand from the initial delta O-18 value established in a protolith. Variations of delta O-18 in mantle eclogites (2-12 parts per thousand; and < 3% out of all samples display delta O-18 over 8 parts per thousand), which have inferred basaltic and cumulate (gabbroic) protoliths, do not fully match those in the oceanic crust (0-15 parts per thousand). This limited overlap could be attributed primarily to the small initial volume of protoliths with delta O-18 > 8 parts per thousand, which subducts into the mantle (up to 5%), and the preferential erosion and partial melting of the uppermost layers of the oceanic crust. The statistical data show that eclogite garnet mainly preserves more ancient oxygen isotope signatures (including the initial delta O-18 of protolith) than clinopyroxene. Garnets with delta O-18 of < 4.5 parts per thousand typical of the cumulate portion of oceanic crust, occur mainly in mantle eclogites from the Kaapvaal Craton (22.3% of finds, a total of 157 samples). For all other cratons, the percentage of garnet with delta O-18 < 4.5 parts per thousand is not > 1.5% (a total of 451 samples). Oxygen isotope composition in a considerable portion of mantle eclogites that originated from the oceanic gabbro based on their chemical composition (delta O-18 < 6 parts per thousand) was re-equilibrated, and they acquired "basalt" isotopic signatures (delta O-18 > 6 parts per thousand).
关键词Oxygen isotopes Mantle eclogites Xenoliths Subduction Lithosphere
DOI10.1016/j.earscirev.2018.06.007
资助者Russian Foundation of Basic Research (RFBR) ; Russian Foundation of Basic Research (RFBR) ; Ministry of Education and Science of Russia ; Ministry of Education and Science of Russia ; Russian Foundation of Basic Research (RFBR) ; Russian Foundation of Basic Research (RFBR) ; Ministry of Education and Science of Russia ; Ministry of Education and Science of Russia ; Russian Foundation of Basic Research (RFBR) ; Russian Foundation of Basic Research (RFBR) ; Ministry of Education and Science of Russia ; Ministry of Education and Science of Russia ; Russian Foundation of Basic Research (RFBR) ; Russian Foundation of Basic Research (RFBR) ; Ministry of Education and Science of Russia ; Ministry of Education and Science of Russia
关键词[WOS]UDACHNAYA KIMBERLITE PIPE ; ROBERTS VICTOR ECLOGITES ; SUBDUCTED OCEANIC-CRUST ; SOUTH-AFRICA ; DIAMONDIFEROUS ECLOGITES ; XENOLITHIC ECLOGITES ; EQUILIBRIUM OXYGEN ; KAAPVAAL CRATON ; TRACE-ELEMENT ; SLAVE CRATON
语种英语
资助项目Russian Foundation of Basic Research (RFBR)[16-35-00321 mol_a] ; Russian Foundation of Basic Research (RFBR)[16-35-60092 mol_a_dk] ; Ministry of Education and Science of Russia[5.9248.2017/6.7]
资助者Russian Foundation of Basic Research (RFBR) ; Russian Foundation of Basic Research (RFBR) ; Ministry of Education and Science of Russia ; Ministry of Education and Science of Russia ; Russian Foundation of Basic Research (RFBR) ; Russian Foundation of Basic Research (RFBR) ; Ministry of Education and Science of Russia ; Ministry of Education and Science of Russia ; Russian Foundation of Basic Research (RFBR) ; Russian Foundation of Basic Research (RFBR) ; Ministry of Education and Science of Russia ; Ministry of Education and Science of Russia ; Russian Foundation of Basic Research (RFBR) ; Russian Foundation of Basic Research (RFBR) ; Ministry of Education and Science of Russia ; Ministry of Education and Science of Russia
WOS研究方向Geology
WOS类目Geosciences, Multidisciplinary
WOS记录号WOS:000448493500014
出版者ELSEVIER SCIENCE BV
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文献类型期刊论文
条目标识符http://ir.iggcas.ac.cn/handle/132A11/89155
专题岩石圈演化国家重点实验室
通讯作者Korolev, Nester M.
作者单位1.Univ British Columbia, 2207 Main Mall, Vancouver, BC V6T 1Z4, Canada
2.Russian Acad Sci, Inst Precambrian Geol & Geochronol, Nab Makarova 2, St Petersburg 199034, Russia
3.St Petersburg Min Univ, 21 Ya Liniya 2, St Petersburg 199106, Russia
4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beitucheng West Roud 19, Beijing 100029, Peoples R China
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Korolev, Nester M.,Melnik, Aleksey E.,Li, Xian-Hua,et al. The oxygen isotope composition of mantle eclogites as a proxy of their origin and evolution: A review[J]. EARTH-SCIENCE REVIEWS,2018,185:288-300.
APA Korolev, Nester M.,Melnik, Aleksey E.,Li, Xian-Hua,&Skublov, Sergey G..(2018).The oxygen isotope composition of mantle eclogites as a proxy of their origin and evolution: A review.EARTH-SCIENCE REVIEWS,185,288-300.
MLA Korolev, Nester M.,et al."The oxygen isotope composition of mantle eclogites as a proxy of their origin and evolution: A review".EARTH-SCIENCE REVIEWS 185(2018):288-300.
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