Topic
Incompatible element
About: Incompatible element is a research topic. Over the lifetime, 2420 publications have been published within this topic receiving 154052 citations.
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TL;DR: Serpentinites in a Tertiary subduction complex in the northern Dominican Republic contain low concentrations of incompatible elements in bulk-rock compositions and high Mg in relict silicate minerals.
Abstract: Serpentinites in a Tertiary subduction complex in the northern Dominican Republic contain low concentrations of incompatible elements in bulk-rock compositions and high Mg in relict silicate minerals. The forsterite component in olivine ranges from 89.0% to 90.8%, and the enstatite component in orthopyroxene ranges from 89.4% to 91.1%, suggesting that they are mantle peridotites. Two different protoliths are identified for the serpentinites based on the bulk-rock compositions and spinel chemistry: abyssal peridotites and forearc mantle peridotites. Hydrated abyssal peridotites are voluminous and occur in ophiolite complexes in the northern terranes (Puerto Plata Complex and the northern part of the Rio San Juan Complex) and in serpentinite melanges in the central part of the Rio San Juan Complex. The serpentinite melanges contain fragments of high-pressure–low-temperature rocks and are interpreted to be tectonic melanges, representing part of a serpentinite subduction channel. The serpentinites show moderate Al/Si weight ratios (0.026–0.081) in bulk rocks and moderate Cr# (atomic ratio of Cr/[Cr + Al] = 0.20–0.55) in spinel. Hydrated forearc mantle peridotites occur along major strike-slip faults, the Camu fault zone, and the Septentrional fault zone. They show low bulk-rock Al/Si weight ratios (up to 0.021), high concentration in Ir-group platinum group elements (13.1–24.6 ppb total), and high Cr# (0.48–0.67) in spinel. Raman spectroscopy and X-ray powder diffraction indicate that lizardite is the predominant serpentine species. The absence of antigorite suggests that these serpentinites were derived from a shallow depth (<
75 citations
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TL;DR: The Purang ophiolite massif was thrust over an Upper Cretaceous melange south of the Yarlung-Zangbo Suture Zone (YZSZ) in SW Tibet as discussed by the authors.
75 citations
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TL;DR: In this paper, the authors determined CO2 glass and vesicle concentrations, plus trace element contents for fifty-one ultradepleted mid-ocean ridge basalt (MORB) glasses from the global mid-Ocean ridge system.
75 citations
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TL;DR: In this paper, a dynamic melting inversion (DMI) method was proposed to calculate the degree of partial melting for cogenetic primary magmas in the context of the dynamic melting model of Langmuir et al.
75 citations
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TL;DR: In this paper, two albitites have been selected for a study of the morphology, typology and age of their zircons, applying for the first time the U-Pb method to Western Tethyan ophiolites.
75 citations