Proceedings of the Oman Drilling Project

Kelemen, P. B.; Matter, Juerg M.; Teagle, D.A.H.; Coggon, J. A.

doi:10.14379/omandp.proc.2020

Cited by 75 publications

(190 citation statements)

References 3 publications

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“…Harzburgite is present in the deeper part of both holes. Both, the dunite and harzburgite are highly altered with serpentine (lizardite and chrysotile) and brucite being the dominant alteration minerals (Kelemen et al, 2020). All conductive zones, parameters is provided in Barker (1988), except for the parameter B which is explained in Hantush (1956).…”

Section: Discussionmentioning

confidence: 99%

Groundwater flow characterization of an ophiolitic hard-rock aquifer from cross-borehole multi-level hydraulic experiments

Lods

Roubinet

Matter

et al. 2020

Journal of Hydrology

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Ophiolitic formations play a critical role in the groundwater resource of numerous countries and areas. Previous studies show that the structural heterogeneities of these rocks, coming from the presence of both different lithological units and multi-scale discontinuities, result in complex hydrogeological features that are not well characterized yet. In particular, there is a need for understanding how these heterogeneities impact the hydrodynamic properties of ophiolitic aquifers and the highly variable chemical composition of the water. To this end, we conduct various kinds of pumping experiments between two boreholes 15 m apart in the ophiolitic formation of the Batin (BA1) site in the wadi Tayin massif of the Sultanate of Oman. Cross-borehole open pumping experiments, as well as multi-level pumping and monitoring hydraulic tests, are performed in conductive zones that were identified from temperature and flowmeter data, but also in low-permeability zones requiring

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Section: Discussionmentioning

confidence: 99%

Groundwater flow characterization of an ophiolitic hard-rock aquifer from cross-borehole multi-level hydraulic experiments

Lods

Roubinet

Matter

et al. 2020

Journal of Hydrology

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“…Beside the microstructural data presented herein, the results of detailed petrographic and petrological, trace element and isotopic, as well as crystallization temperature studies will be published soon qualifying the Wadi Gideah section as a reference section of lower fast-spread crust in the Samail ophiolite. This reference section also provides the opportunity to integrate data from the drill cores GT1 and GT2 of the Oman Drilling Project (Kelemen et al, 2020), which are located in the same Wadi. The 400 m long gabbro sections from drill sites GT1 and GT2 are located in the LG and in the layered/foliated gabbro transition of the Wadi Gideah, respectively.…”

Section: Geological Background: the Wadi Gideah Reference Sectionmentioning

confidence: 99%

A Reference Section Through Fast‐Spread Lower Oceanic Crust, Wadi Gideah, Samail Ophiolite (Sultanate of Oman): Insights From Crystallographic Preferred Orientations

et al. 2021

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Based on marine geophysics, seafloor geology, and ophiolite studies, the classical picture of a uniformly layered oceanic crust (with basaltic lava flows, basaltic sheeted dikes, and gabbros, from top to bottom) emerged in the early 1970s (Anonymous, 1972). About 50 years later, our vision of the architecture of the ocean crust has considerably evolved, with a continuously growing understanding of its variability at the global scale. This variability results from various modes of accretion that are controlled by magma supply to the ridge, which in turn is related on the first order to spreading rate (e.g.

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“…Magnesium fluxes during these three stages of alteration remain poorly constrained but inferences of water/rock during alteration have been made for Oman peridotites. Observations in partially serpentinized peridotites of sulfide, and in some cases native metals recording low oxygen fugacities, are associated with low water/rock ratios (W/R) and incipient serpentinization (de Obeso & Kelemen, 2020;Frost, 1985;Kelemen et al, 2020;Lorand, 1988). Increased W/R are inferred from changes in accessory sulfide minerals (de Obeso & Kelemen, 2020) and the occurrence of diffuse carbonate vein networks in the peridotites (Noël et al, 2018).…”

Section: Geological Background and Sample Selectionmentioning

confidence: 99%

A Mg Isotopic Perspective on the Mobility of Magnesium During Serpentinization and Carbonation of the Oman Ophiolite

et al. 2021

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Alteration of ultramafic rocks is ubiquitous in near-surface environments, both on land and below the seafloor. Mantle olivine and pyroxene are unstable at near-surface conditions and undergo hydration (serpentinization) and carbonation when fluids are present (e.g., Moody, 1976). These reactions result in the formation of serpentine minerals, carbonates, brucite, magnetite, and other Fe-oxides and hydroxides. Serpentinization and carbonation reactions are often nearly isochemical apart from the addition of H 2 O and CO 2 (e.g., Coleman & Keith, 1971). Both observations and thermodynamic modeling suggest that changes in major element ratios such as Si/Mg are minor (e.g., ≤10% for low-temperature reaction with seawater,

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Proceedings of the Oman Drilling Project

Cited by 75 publications

References 3 publications

Groundwater flow characterization of an ophiolitic hard-rock aquifer from cross-borehole multi-level hydraulic experiments

Groundwater flow characterization of an ophiolitic hard-rock aquifer from cross-borehole multi-level hydraulic experiments

A Reference Section Through Fast‐Spread Lower Oceanic Crust, Wadi Gideah, Samail Ophiolite (Sultanate of Oman): Insights From Crystallographic Preferred Orientations

A Mg Isotopic Perspective on the Mobility of Magnesium During Serpentinization and Carbonation of the Oman Ophiolite

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