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Post-magmatic hydrothermal activities in the Bursa ophiolite (NW Turkey): Implications for unusual minerals recovered from ophiolites
Liu, Xia1,2; Su, Ben-Xun1,2; Gopon, Phillip3; Xiao, Yan4; Uysal, Ibrahim5
2023
Source PublicationLITHOS
ISSN0024-4937
Volume436-437Pages:10
AbstractLow-temperature hydrothermal activities in ophiolites and their modification of chromite have been less studied compared to the magmatic processes. Here we present evidence of hydrothermal modification of chromitites from the mantle sequence of the Bursa ophiolite (NW Turkey). The chromitites are composed mainly of chromite with variable amounts of magnesite and quartz in the matrix. Many chromite grains contain various inclusions such as monophase magnesite or quartz, as well as multi-phase inclusions of quartz + chlorite +/- magnesite associated with or without ferrian chromite, which are unusual in ophiolitic chromitites worldwide. Ferrian chromite intergrown with chlorite and quartz inclusions, has higher Cr# values (88.3-94.1) but lower MgO (6.11-9.74 wt%), and Fe3+/(Fe3++Fe2+) ratios (0.13-0.25) than primary chromite (Cr#: 78.3-79.1); MgO: 15.4-15.6 wt%; Fe3+/(Fe3++Fe2+): 0.36-0.40), indicating the infiltration of reducing and SiO2-rich serpenti-nizing fluids. The pyroxene and olivine were likely broken down by the pre-existing fluids and contributed to the SiO2-rich characteristic of serpentinizing fluid. Fluxing by CO2-rich fluids produced carbonation of the previous serpentine matrix and formed interstitial magnesite and quartz. Lower MgO contents and overall higher Cr# values of small chromite grains hosted in magnesite matrix compared to those hosted in quartz matrix (MgO: 13.2-15.0 wt% vs. 14.8-15.4 wt%; Cr#: 78.7-79.8 vs. 78.2-78.8) suggest that the carbonated fluids redis-tributed Mg2+ into magnesite and subtly increased Cr solubility in the fluids. Recrystallization may have prompted fracture healing in chromite grains and preservation of quartz when not associated with ferrian chromite. The carbon and oxygen isotope compositions of magnesite (813C: -3.35 parts per thousand; 818O: 17.29 parts per thousand) indicate that the CO2-rich fluids were likely derived by decarbonation of marble and metaclastic rocks from the Tavs,anli zone metamorphic rocks in the Bursa ophiolite.
KeywordChromite Hydrothermal fluids Mineral inclusion Carbonation Ophiolite
DOI10.1016/j.lithos.2022.106957
Funding OrganizationSecond Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences
WOS KeywordPOZANTI-KARSANTI OPHIOLITE ; OMAN OPHIOLITE ; PODIFORM CHROMITITES ; FLUID INCLUSIONS ; PERIDOTITE ; PETROGENESIS ; CARBONATION ; ORHANELI ; GENESIS ; ORIGIN
Language英语
Funding ProjectSecond Tibetan Plateau Scientific Expedition and Research Program (STEP)[2019QZKK0801] ; Youth Innovation Promotion Association, Chinese Academy of Sciences
Funding OrganizationSecond Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences
WOS Research AreaGeochemistry & Geophysics ; Mineralogy
WOS SubjectGeochemistry & Geophysics ; Mineralogy
WOS IDWOS:000899579500002
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/106949
Collection矿产资源研究院重点实验室
岩石圈演化国家重点实验室
Corresponding AuthorLiu, Xia; Su, Ben-Xun
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Univ Leoben, Chair Geol & Econ Geol, A-8700 Leoben, Austria
4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
5.Karadeniz Tech Univ, Dept Geol Engn, TR-61080 Trabzon, Turkey
First Author AffilicationKey Laboratory of Mineral Resources, Chinese Academy of Sciences
Corresponding Author AffilicationKey Laboratory of Mineral Resources, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Liu, Xia,Su, Ben-Xun,Gopon, Phillip,et al. Post-magmatic hydrothermal activities in the Bursa ophiolite (NW Turkey): Implications for unusual minerals recovered from ophiolites[J]. LITHOS,2023,436-437:10.
APA Liu, Xia,Su, Ben-Xun,Gopon, Phillip,Xiao, Yan,&Uysal, Ibrahim.(2023).Post-magmatic hydrothermal activities in the Bursa ophiolite (NW Turkey): Implications for unusual minerals recovered from ophiolites.LITHOS,436-437,10.
MLA Liu, Xia,et al."Post-magmatic hydrothermal activities in the Bursa ophiolite (NW Turkey): Implications for unusual minerals recovered from ophiolites".LITHOS 436-437(2023):10.
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