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Titanium- and water-rich metamorphic olivine in high-pressure serpentinites from the Voltri Massif (Ligurian Alps, Italy): evidence for deep subduction of high-field strength and fluid-mobile elements
DC Field | Value | Language |
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dc.contributor.author | De Hoog, Jan C. M. | - |
dc.contributor.author | Hattori, Keiko | - |
dc.contributor.author | Jung, Haemyeong | - |
dc.date.accessioned | 2023-07-14T04:18:26Z | - |
dc.date.available | 2023-07-14T04:18:26Z | - |
dc.date.created | 2020-07-23 | - |
dc.date.issued | 2014-03 | - |
dc.identifier.citation | Contributions to Mineralogy and Petrology, Vol.167 No.3, p. 990 | - |
dc.identifier.issn | 0010-7999 | - |
dc.identifier.uri | https://hdl.handle.net/10371/195168 | - |
dc.description.abstract | Titanium- and water-rich metamorphic olivine (Fo 86-88) is reported from partially dehydrated serpentinites from the Voltri complex, Ligurian Alps. The rocks are composed of mostly antigorite and olivine in addition to magnetite, chlorite, clinopyroxene and Ti-clinohumite. In situ secondary ion mass spectrometry (SIMS) data show that metamorphic olivine has very high and strongly correlated H2O (up to 0.7 wt%) and TiO2 contents (up to 0.85 wt%). Ti-rich olivine shows colourless to yellow pleochroism. Olivine associated with Ti-clinohumite contains low Ti, suggesting that Ti-rich olivine is not the breakdown product of Ti-clinohumite. Fourier transform infrared spectroscopy (FTIR) absorption spectra show peaks of serpentine, Ti-clinohumite and OH-related Si vacancies. Combining FTIR and SIMS data, we suggest the presence of clustered planar defects or nanoscale exsolutions of Ti-clinohumite in olivine. These defects or exsolutions contain more H2O (x similar to 0.1 in the formula 4Mg(2)SiO(4)center dot(1-x)Mg(OH, F)(2)center dot xTiO(2)) than Ti-clinohumite in the sample matrix (x = 0.34-0.46). In addition to TiO2 and H2O, secondary olivine contains significant Li (2-60 ppm), B (10-20 ppm), F (10-130 ppm) and Zr (0.9-2.1 ppm). It is enriched in B-11 (delta B-11 = +17 to +23 parts per thousand). Our data indicate that secondary olivine may play a significant role in transporting water, high-field strength and fluid-mobile elements into the deeper mantle as well as introduce significant B isotope anomalies. Release of hydrogen from H2O-rich olivine subducted into the deep mantle may result in strongly reduced mantle domains. | - |
dc.language | 영어 | - |
dc.publisher | Springer Verlag | - |
dc.title | Titanium- and water-rich metamorphic olivine in high-pressure serpentinites from the Voltri Massif (Ligurian Alps, Italy): evidence for deep subduction of high-field strength and fluid-mobile elements | - |
dc.type | Article | - |
dc.identifier.doi | 10.1007/s00410-014-0990-x | - |
dc.citation.journaltitle | Contributions to Mineralogy and Petrology | - |
dc.identifier.wosid | 000332585700012 | - |
dc.identifier.scopusid | 2-s2.0-84895416634 | - |
dc.citation.number | 3 | - |
dc.citation.startpage | 990 | - |
dc.citation.volume | 167 | - |
dc.description.isOpenAccess | Y | - |
dc.contributor.affiliatedAuthor | Jung, Haemyeong | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.subject.keywordPlus | MANTLE OLIVINE | - |
dc.subject.keywordPlus | HUMITE MINERALS | - |
dc.subject.keywordPlus | TI-CLINOHUMITE | - |
dc.subject.keywordPlus | ORTHO-PYROXENE | - |
dc.subject.keywordPlus | DABIE-SHAN | - |
dc.subject.keywordPlus | BEARING | - |
dc.subject.keywordPlus | PERIDOTITE | - |
dc.subject.keywordPlus | BREAKDOWN | - |
dc.subject.keywordPlus | SOLUBILITY | - |
dc.subject.keywordPlus | ANTIGORITE | - |
dc.subject.keywordAuthor | Metamorphic olivine | - |
dc.subject.keywordAuthor | Clinohumite | - |
dc.subject.keywordAuthor | Serpentinite | - |
dc.subject.keywordAuthor | High-pressure metamorphism | - |
dc.subject.keywordAuthor | Subduction recycling of elements | - |
dc.subject.keywordAuthor | Voltri Massif | - |
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