Neoarchean-Paleoproterozoic granulite-facies metamorphism in Uzkaya Salma eclogite-bearing melange, Belomorian Province (Russia)
A TTG gneiss of Uzkaya Salma, Belomorian Province and retrogressed eclogites embedded in it have been thoroughly analyzed. The gneiss is made of plagioclase, K-feldspar, biotite, and quartz with accessory epidote, chlorite, titanite and zircon. The retrogressed eclogite is featured by garnet, clinop...
Published in: | Precambrian Research |
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PRECAMBRIAN RESEARCH
2017
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Online Access: | https://hdl.handle.net/20.500.11897/473180 https://doi.org/10.1016/j.precamres.2017.03.031 |
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Peking University Institutional Repository (PKU IR) |
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English |
topic |
Neoarchean granulite Uzkaya Salma eclogite U-Pb dating PT path U-PB AGES IN-RUTILE THERMOMETRY LAPLAND-KOLA OROGEN NORTH CHINA CRATON MOBILE BELT BALTIC SHIELD FENNOSCANDIAN SHIELD SM-ND DABIE OROGEN ISOTOPIC AGE |
spellingShingle |
Neoarchean granulite Uzkaya Salma eclogite U-Pb dating PT path U-PB AGES IN-RUTILE THERMOMETRY LAPLAND-KOLA OROGEN NORTH CHINA CRATON MOBILE BELT BALTIC SHIELD FENNOSCANDIAN SHIELD SM-ND DABIE OROGEN ISOTOPIC AGE Li, Xiaoli Zhang, Lifei Wei, Chunjing Slabunov, Alexander I. Bader, Thomas Neoarchean-Paleoproterozoic granulite-facies metamorphism in Uzkaya Salma eclogite-bearing melange, Belomorian Province (Russia) |
topic_facet |
Neoarchean granulite Uzkaya Salma eclogite U-Pb dating PT path U-PB AGES IN-RUTILE THERMOMETRY LAPLAND-KOLA OROGEN NORTH CHINA CRATON MOBILE BELT BALTIC SHIELD FENNOSCANDIAN SHIELD SM-ND DABIE OROGEN ISOTOPIC AGE |
description |
A TTG gneiss of Uzkaya Salma, Belomorian Province and retrogressed eclogites embedded in it have been thoroughly analyzed. The gneiss is made of plagioclase, K-feldspar, biotite, and quartz with accessory epidote, chlorite, titanite and zircon. The retrogressed eclogite is featured by garnet, clinopyroxene, plagioclase, amphibole, and quartz with subordinate orthopyroxene, muscovite, epidote, and melt phase exhibiting a typical symplectic texture. Diversity of compositional zonation in garnets depends on different garnet diameters and is related to ion diffusion between garnet and clinopyroxeneiamphibole during retrogression. Clinopyroxene is mostly diopside, although a few Jd-enriched varieties (Na-rich clinopyroxene) have been found at some sites, indicating an omphacite precursor. Plagioclase formed in both symplectites and aggregates displays a wide compositional range, revealing alteration at certain PT conditions. K-bearing ternary feldspar casually occurs in association with muscovite, zoisite/epidote, and melt phase, denoting a partial melting product. Phase equilibria modeling, combined with mineralogical constrains yielded a clock-wise PT path with peak conditions of P >= 17-18 kbar, T = 700-750 degrees C, followed by granulite-facies at P = 13-15 kbar, T = 800-850 degrees C, and, eventually into the (upper) amphibolite-facies of T <= 700-750 degrees C at lower pressures. A geothermal gradient of similar to 12-13 degrees C/km is inferred accordingly, rather common for the Belomorian eclogites and some other eclogite/high-pressure granulite belts (EHPG) on Earth. Zircon U-Pb dating shows that the TUG gneiss formed at 2.73-2.74 Ga, while the protolith of the eclogites may have experienced magmatism/anatexis at >= 2.77 Ga. There is no implication of any Archean eclogite-facies metamorphism in this work. Nevertheless, a granulite-facies metamorphism, featured by a diopside + plagioclase + amphibole garnet, orthopyroxene assemblage, has been determined at 2.7 Ga that also superimposed the host gneiss. Afterwards, due to regional plume activities, repeated thermal events of granulite-facies metamorphism, occurred at least locally at 2.4-2.5 Ga. An eclogite-facies metamorphism at 1.9-2.0 Ga was dated only that corresponds to the Lapland-Kola orogeny. Further retrogression into the (upper) amphibolite-facies was documented at 1.8 Ga. The proposed metamorphic PT path corresponds to the late Paleoproterozoic eclogite-facies event, while before that, only (repeated) granulite-facies metamorphism has been recorded by zircons. (C) 2017 Elsevier B.V. All rights reserved. National Nature Science Foundation of China [41202032, 412111062, 41311120071] SCI(E) ARTICLE 257-283 294 |
author2 |
Li, XL (reprint author), Yiheyuan Rd 5, Beijing 100871, Peoples R China. Peking Univ, Key Lab Orogen Belts & Crustal Evolut MOE, Sch Earth & Space Sci, Beijing 100871, Peoples R China. Karelian Res Ctr RAS, Inst Geol, Petrozavodsk 185910, Russia. Yiheyuan Rd 5, Beijing 100871, Peoples R China. |
format |
Journal/Newspaper |
author |
Li, Xiaoli Zhang, Lifei Wei, Chunjing Slabunov, Alexander I. Bader, Thomas |
author_facet |
Li, Xiaoli Zhang, Lifei Wei, Chunjing Slabunov, Alexander I. Bader, Thomas |
author_sort |
Li, Xiaoli |
title |
Neoarchean-Paleoproterozoic granulite-facies metamorphism in Uzkaya Salma eclogite-bearing melange, Belomorian Province (Russia) |
title_short |
Neoarchean-Paleoproterozoic granulite-facies metamorphism in Uzkaya Salma eclogite-bearing melange, Belomorian Province (Russia) |
title_full |
Neoarchean-Paleoproterozoic granulite-facies metamorphism in Uzkaya Salma eclogite-bearing melange, Belomorian Province (Russia) |
title_fullStr |
Neoarchean-Paleoproterozoic granulite-facies metamorphism in Uzkaya Salma eclogite-bearing melange, Belomorian Province (Russia) |
title_full_unstemmed |
Neoarchean-Paleoproterozoic granulite-facies metamorphism in Uzkaya Salma eclogite-bearing melange, Belomorian Province (Russia) |
title_sort |
neoarchean-paleoproterozoic granulite-facies metamorphism in uzkaya salma eclogite-bearing melange, belomorian province (russia) |
publisher |
PRECAMBRIAN RESEARCH |
publishDate |
2017 |
url |
https://hdl.handle.net/20.500.11897/473180 https://doi.org/10.1016/j.precamres.2017.03.031 |
long_lat |
ENVELOPE(32.133,32.133,65.817,65.817) ENVELOPE(162.397,162.397,56.297,56.297) ENVELOPE(33.663,33.663,66.282,66.282) |
geographic |
Salma Uzkaya Uzkaya Salma |
geographic_facet |
Salma Uzkaya Uzkaya Salma |
genre |
Fennoscandian Lapland |
genre_facet |
Fennoscandian Lapland |
op_source |
SCI |
op_relation |
PRECAMBRIAN RESEARCH.2017,294,257-283. 1907397 0301-9268 http://hdl.handle.net/20.500.11897/473180 1872-7433 doi:10.1016/j.precamres.2017.03.031 WOS:000402217500015 |
op_doi |
https://doi.org/20.500.11897/473180 https://doi.org/10.1016/j.precamres.2017.03.031 |
container_title |
Precambrian Research |
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294 |
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257 |
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283 |
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1765998815607783424 |
spelling |
ftpekinguniv:oai:localhost:20.500.11897/473180 2023-05-15T16:13:12+02:00 Neoarchean-Paleoproterozoic granulite-facies metamorphism in Uzkaya Salma eclogite-bearing melange, Belomorian Province (Russia) Li, Xiaoli Zhang, Lifei Wei, Chunjing Slabunov, Alexander I. Bader, Thomas Li, XL (reprint author), Yiheyuan Rd 5, Beijing 100871, Peoples R China. Peking Univ, Key Lab Orogen Belts & Crustal Evolut MOE, Sch Earth & Space Sci, Beijing 100871, Peoples R China. Karelian Res Ctr RAS, Inst Geol, Petrozavodsk 185910, Russia. Yiheyuan Rd 5, Beijing 100871, Peoples R China. 2017 https://hdl.handle.net/20.500.11897/473180 https://doi.org/10.1016/j.precamres.2017.03.031 en eng PRECAMBRIAN RESEARCH PRECAMBRIAN RESEARCH.2017,294,257-283. 1907397 0301-9268 http://hdl.handle.net/20.500.11897/473180 1872-7433 doi:10.1016/j.precamres.2017.03.031 WOS:000402217500015 SCI Neoarchean granulite Uzkaya Salma eclogite U-Pb dating PT path U-PB AGES IN-RUTILE THERMOMETRY LAPLAND-KOLA OROGEN NORTH CHINA CRATON MOBILE BELT BALTIC SHIELD FENNOSCANDIAN SHIELD SM-ND DABIE OROGEN ISOTOPIC AGE Journal 2017 ftpekinguniv https://doi.org/20.500.11897/473180 https://doi.org/10.1016/j.precamres.2017.03.031 2021-08-01T11:12:43Z A TTG gneiss of Uzkaya Salma, Belomorian Province and retrogressed eclogites embedded in it have been thoroughly analyzed. The gneiss is made of plagioclase, K-feldspar, biotite, and quartz with accessory epidote, chlorite, titanite and zircon. The retrogressed eclogite is featured by garnet, clinopyroxene, plagioclase, amphibole, and quartz with subordinate orthopyroxene, muscovite, epidote, and melt phase exhibiting a typical symplectic texture. Diversity of compositional zonation in garnets depends on different garnet diameters and is related to ion diffusion between garnet and clinopyroxeneiamphibole during retrogression. Clinopyroxene is mostly diopside, although a few Jd-enriched varieties (Na-rich clinopyroxene) have been found at some sites, indicating an omphacite precursor. Plagioclase formed in both symplectites and aggregates displays a wide compositional range, revealing alteration at certain PT conditions. K-bearing ternary feldspar casually occurs in association with muscovite, zoisite/epidote, and melt phase, denoting a partial melting product. Phase equilibria modeling, combined with mineralogical constrains yielded a clock-wise PT path with peak conditions of P >= 17-18 kbar, T = 700-750 degrees C, followed by granulite-facies at P = 13-15 kbar, T = 800-850 degrees C, and, eventually into the (upper) amphibolite-facies of T <= 700-750 degrees C at lower pressures. A geothermal gradient of similar to 12-13 degrees C/km is inferred accordingly, rather common for the Belomorian eclogites and some other eclogite/high-pressure granulite belts (EHPG) on Earth. Zircon U-Pb dating shows that the TUG gneiss formed at 2.73-2.74 Ga, while the protolith of the eclogites may have experienced magmatism/anatexis at >= 2.77 Ga. There is no implication of any Archean eclogite-facies metamorphism in this work. Nevertheless, a granulite-facies metamorphism, featured by a diopside + plagioclase + amphibole garnet, orthopyroxene assemblage, has been determined at 2.7 Ga that also superimposed the host gneiss. Afterwards, due to regional plume activities, repeated thermal events of granulite-facies metamorphism, occurred at least locally at 2.4-2.5 Ga. An eclogite-facies metamorphism at 1.9-2.0 Ga was dated only that corresponds to the Lapland-Kola orogeny. Further retrogression into the (upper) amphibolite-facies was documented at 1.8 Ga. The proposed metamorphic PT path corresponds to the late Paleoproterozoic eclogite-facies event, while before that, only (repeated) granulite-facies metamorphism has been recorded by zircons. (C) 2017 Elsevier B.V. All rights reserved. National Nature Science Foundation of China [41202032, 412111062, 41311120071] SCI(E) ARTICLE 257-283 294 Journal/Newspaper Fennoscandian Lapland Peking University Institutional Repository (PKU IR) Salma ENVELOPE(32.133,32.133,65.817,65.817) Uzkaya ENVELOPE(162.397,162.397,56.297,56.297) Uzkaya Salma ENVELOPE(33.663,33.663,66.282,66.282) Precambrian Research 294 257 283 |