Abstract. The Oman Drilling Project (OmanDP), performed under the International Continental Scientific Program (ICDP), is an international scientific research project that undertook drilling at a range of sites in Semail ophiolite (Oman) to collect core samples spanning stratigraphy ophiolite, from upper oceanic crust down basal thrust. cores were logged Ocean Discovery (IODP) standards aboard ...

Abstract The mantle–crust boundary beneath oceanic spreading centres is a major chemical and thermal interface on Earth. Observations in ophiolites reveal that it underlined by dunitic transition zone (DTZ) can reach few hundred meters thickness host abundant chromitite ore bodies. dunites have been deciphered as essentially mantle-derived most ophiolitic massifs; is, reactional residues of int...

Concentrations of the incompatible trace elements and REEs in the upper mantle rocks of the Northern Semail ophiolite are very low, as typical in the residua of partial melting and in the early products of a fractionating magma. However, their geochemical characteristics have shown indications of hydrous magmas that more likely related to a subduction environment. Melt extraction can play a cru...

Introduction: In 1999 we calculated the production of spinel-bearing silicate liquid droplets from the condensing fireball produced in the Chicxulub Cretaceous/Tertiary impact [1], based on predicted plume compositions for 4 vertical impacts [2]. Recent calculations for oblique impacts [3], following only the first 5 post-impact seconds, predict the contributions of impactor [4], continental cr...

Mantle–melt interaction during melt transport is explored in one generally moves relative to the residual solid phases. This follows from experimental and theoretical studies of the dimension and steady state. We reconsider the equivalence between one-dimensional steady equilibrium transport and batch melting. In equilibrium textures of olivine-dominated, partially molten systems, which indicat...

The magmatic activity on Vesta was certainly dominated by a large-scale melting event, which generated a global magma-ocean. According to this view, eucrites can be explained in terms of fractional crystallization, with subsequent contamination of the melts by liquids derived by partial fusion of the asteroid's crust [e.g, 1-3]. The HED cumulates (cumulate eucrites, dio-genites, and a dunite) p...

Introduction: Apatite has been extensively studied on Earth because of its geological, geobiological, and materials importance [1], and it is one of the most common mineralogical reservoirs for phosphorus on Earth. Apatite is also present in each of the three types of SNC meteorites, implying the same may also be true for Mars. In addition to phosphorus, apatite commonly contains some combinati...

Trieloff et al. (1) provided neon isotope data to argue that mantle neon originates as a trapped component in meteorites rather than having a pristine solar composition. That finding, if true, has important consequences for understanding the mechanism of volatile input into the mantle, because it rules out models involving direct incorporation of solar gases. The main argument that Trieloff et ...

Molecular hydrogen (H 2 ) released during serpentinization of mantle rocks is one the main fuels for chemosynthetic life. Processes H production at slow-spreading mid-ocean ridges (MORs) have received much attention in past. Less well understood passive continental margins where different rock types are involved (lherzolite instead harzburgite/dunite MORs) and alteration temperatures tend to be...