Trace elements in abyssal peridotite olivine record melting, …
2023年9月6日 · Trace element concentrations in abyssal peridotite olivine provide insights into the formation and evolution of the oceanic lithosphere. We present olivine trace element compositions (Al, Ca, Ti, V, Cr, Mn, Co, Ni, Zn, Y, Yb) from abyssal peridotites to investigate partial melting, melt–rock interaction, and subsolidus cooling at mid-ocean ...
Peridotite - Wikipedia
Peridotite (US: / ˈpɛrɪdoʊˌtaɪt, pəˈrɪdə -/ PERR-ih-doh-tyte, pə-RID-ə-) is a dense, coarse-grained igneous rock consisting mostly of the silicate minerals olivine and pyroxene. Peridotite is ultramafic, as the rock contains less than 45% silica.
Peridotite - SpringerLink
Peridotite is an ultramafic plutonic rock containing 40–100% olivine (from peridot, French for olivine); other essential minerals include clinopyroxene and orthopyroxene; common accessory minerals are hornblende, mica, spinel, garnet, feldspar, ilmenite, and sulfides.
Peridotite - SpringerLink
2014年1月1日 · Peridotites are the main lithology of the Earth’s upper mantle. According to the IUGS classification (Le Bas and Streckeisen, 1991), they are defined as a coarse-grained ultramafic rock type, containing more than 40 % olivine.
(PDF) Trace elements in abyssal peridotite olivine record melting ...
2023年9月6日 · We present olivine trace element compositions (Al, Ca, Ti, V, Cr, Mn, Co, Ni, Zn, Y, Yb) from abyssal peridotites to investigate partial melting, melt–rock interaction, and subsolidus cooling at...
Depth-dependent peridotite-melt interaction and the origin of ... - Nature
2021年2月17日 · Reaction between highly magnesian melt (komatiite) and peridotite leads to orthopyroxene crystallisation, yielding silica-rich harzburgite. By contrast, shallow basalt-peridotite reaction leads...
Minor elements in olivine inspect the petrogenesis of orogenic ...
2019年11月1日 · Orogenic mantle peridotites can be distinguished from crustal peridotites by overall higher Ni and lower Co and Zn contents in olivine. In particular, the Ni/Co ratio of olivine can successfully discriminate between the two types of peridotites.
Deep, hot, ancient melting recorded by ultralow oxygen ... - Nature
2024年7月24日 · Here we report the petrography and geochemistry of peridotites from the Gakkel Ridge and East Pacific Rise (EPR), including 16 new high-precision determinations of fO2. Refractory peridotites from...
The roles of pyroxenite and peridotite in the mantle sources
2017年6月12日 · Here, we test whether melting of peridotite alone can explain the observed trend in olivine compositions by combining new experimental data on the partitioning of Mn between olivine and...
Origin and evolution of serpentinized peridotite from the Ciletuh ...
Olivine-Mantle Array (mantle peridotite range) is after Takahashi (1986). (E) Fo (Mg#) vs. Ni/Mn ratio of olivine, with fields of various origins compiled by Wang et al. (2021). The yellow line (Ni/Mn = 2) represents the bulk silicate Earth (BSE) value (McDonough and Sun, 1995). (For interpretation of the references to color in this figure ...
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