CO2 sequestration and extreme Mg depletion in serpentinized peridotite clasts from the Devonian Solund basin, SW-Norway

Beinlich, Andreas; Austrheim, Håkon; Glodny, Johannes; Erambert, Muriel; Andersen, Torgeir B.

doi:10.1016/j.gca.2010.07.027

Cited by 52 publications

(46 citation statements)

References 74 publications

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“…However, despite their Mg-rich nature, ultramafic rocks are often found in association with calcite rather than dolomite or magnesite. Many studies of natural analogues of carbon sequestration showed that the carbonation of the ultramafic precursor involved substantial removal of Mg and enrichment in Ca (Capedri and Rossi, 1973;Gibson et al, 1996;Akbulut et al, 2006;Tsikouras et al, 2006;Nasir et al, 2007;Beinlich et al, 2010). In oceanic settings, Ca may be derived from seawater, pelagic sediments or the breakdown of clinopyroxene during seafloor serpentinization (e.g., Barnes and O'Neil, 1969;Barbieri et al, 1979;Bernoulli and Weissert, 1985;Palandri and Reed, 2004;Frost and Beard, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…In oceanic settings, Ca may be derived from seawater, pelagic sediments or the breakdown of clinopyroxene during seafloor serpentinization (e.g., Barnes and O'Neil, 1969;Barbieri et al, 1979;Bernoulli and Weissert, 1985;Palandri and Reed, 2004;Frost and Beard, 2007). Beinlich et al (2010) documented a special case of ophicarbonate formation within a continental sedimentary setting. They showed that partly serpentinized and weathered peridotite clasts, found in the conglomerates of the Solund basin (SW Norway), evolved to calcite-rich and extremely Mg-depleted assemblages due to interaction with Ca-and CO 2 -bearing basinal fluids.…”

Section: Introductionmentioning

confidence: 99%

“…In fact, peridotites in both marine (Snow and Dick, 1995;Augustin et al, 2008) and terrestrial environments (Maquet et al, 1981;Yang and Shau, 1991;Venturelli et al, 1997) are commonly extensively weathered. Typical weathering products of ultramafic rocks include Fe-oxides and -hydroxides, Mg-rich clay minerals as well as poorly ordered mixtures of serpentine-and talc-like mineraloids, often referred to as deweylite (Lapham, 1961;Wenner and Taylor, 1971;Bish and Brindley, 1978;Schandl and Gorton, 1995;Beinlich et al, 2010). Until now, carbonation of these weathering products has not been experimentally investigated, even though they likely play a role in enhancing natural peridotite carbonation.…”

Section: Introductionmentioning

confidence: 99%

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Experimental study of the carbonation of partially serpentinized and weathered peridotites

Hövelmann

Austrheim

Beinlich

et al. 2011

Geochimica et Cosmochimica Acta

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Experimental study of the carbonation of partially serpentinized and weathered peridotites

Hövelmann

Austrheim

Beinlich

et al. 2011

Geochimica et Cosmochimica Acta

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“…Extensive alkali exchange has been documented in diagenetically altered sandstones (e.g., Boles and Ramseyer 1988;Morad 1988). Recent work by Beinlich et al (2010a) documents extensive Mg removal during weathering resulting in the production of quartz-bearing rocks from peridotite conglomerate clasts. Association of metasomatism with metamorphism, at any grade, can depend on the ability to associate the chemical change with textures and mineral parageneses that can be linked to this metamorphism(e.g., the grain-scale metasomatism represented by partial replacement of igneous hornblende by sodic amphibole in Fig.…”

Section: Styles Of Metasomatism Preserved In Hp/uhp Rocksmentioning

confidence: 99%

Metasomatism in Subduction Zones of Subducted Oceanic Slabs, Mantle Wedges, and the Slab-Mantle Interface

Bebout

2012

Lecture Notes in Earth System Sciences

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Physical juxtaposition of chemically disparate rocks, and the mobility of "fluids" at up to tens of kilometer scales, lead to myriad metasomatic effects in subduction zones, with larger scale manifestations including the metasomatism related to mass flux leading to arc magmatism and convergent margin volatiles cycling. Subduction-zone metasomatism is initiated at very shallow levels, as oceanic slabs entering trenches bend and are potentially infiltrated by seawater and as sedimentary sections begin their journey into forearcs resulting in extensive physical compaction, fluid expulsion, and diagenetic alteration. Studies of forearc fluid geochemistry (e.g., in accretionary complexes and, for the Marianas margin, in serpentinite seamounts) track this shallow-level metasomatic alteration, whereas high-and ultrahigh-pressure metamorphic suites provide records of fluid generation and flow, and related metasomatism to depths approaching those beneath volcanic fronts (and, in a smaller number of cases, depths beyond those beneath arcs). Uncertainty remains regarding the geochemical influence of strongly mechanically mixed zones along the slab-mantle interface (i.e., in the "subduction channel"), represented by mélange zones in many metamorphic suites. Experimental studies predict dramatic change in the physicochemical properties, and metasomatic capabilities, of subduction-zone "fluids," as a function of depth. However, the studies of metamorphic suites have yet to document results of this change and, toward this goal, further work is warranted on UHP suites representing subduction-zone depths of 100 km or greater. Work on higher-P suites is also necessary in order to test the generally accepted hypothesis that subduction-zone metamorphism serves as a geochemical "filter" altering the

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“…The minerals observed are calcite and aragonite (both CaCO 3 ), as well as brucite (Mg(OH) 2 ) and antigorite ((Mg,Fe) 3 Si 2 O 5 (OH) 4 ) (Neal and Stanger, 1984a;Chavagnac et al, 2013a). Spring waters in natural systems can be considered as an analogue for CO 2 injection into ophiolites in general (Kelemen and Matter, 2008;Beinlich et al, 2010Beinlich et al, , 2012Paukert et al, 2012) and by studying the uptake of trace metals into the secondary phases, we can gain information about their mobility as a result of CO 2 injection. The aim of this study was to analyse ultramafic spring waters and the natural precipitated products to investigate the extent of trace element uptake into the solids and loss from the solution phase.…”

Section: Introductionmentioning

confidence: 99%

Element scavenging by recently formed travertine deposits in the alkaline springs from the Oman Semail Ophiolite

2014

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Ultramafic rocks, such as the Semail Ophiolite in the Sultanate of Oman, are considered to be a potential storage site for CO 2 . This type of rock is rich in divalent cations that can react with dissolved CO 2 and form carbonate minerals, which remain stable over geological periods of time. Dissolution of the ophiolite mobilizes heavy metals, which can threaten the safety of surface and groundwater supplies but secondary phases, such as iron oxides, clays and carbonate minerals, can take up significant quantities of trace elements both in their structure and adsorbed on their surfaces.Hyperalkaline spring waters issuing from the Semail Ophiolites can have pH as high as 12. This water absorbs CO 2 from air, forming carbonate mineral precipitates either as thin crusts on the surface of placid water pools or bottom precipitates in turbulent waters. We investigated the composition of the spring water and the precipitates to determine the extent of trace element uptake. We collected water and travertine samples from two alkaline springs of the Semail Ophiolite. Twenty seven elements were detected in the spring waters. The bulk of the precipitate was CaCO 3 in aragonite, as needles, and rhombohedral calcite crystals. Traces of dypingite (Mg 5 (CO 3 ) 4 (OH) 2 ·5H 2 O) and antigorite ((Mg,Fe) 3 Si 2 O 5 (OH) 4 ) were also detected. The bulk precipitate contained rare earth elements and toxic metals, such as As, Ba, Cd, Sr and Pb, which indicated scavenging by the carbonate minerals. Boron and mercury were detected in the spring water but not in the carbonate phases. The results provide confidence that many of the toxic metals released by ophiolite dissolution in an engineered CO 2 injection project would be taken up by secondary phases, minimizing risk to water quality.

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CO2 sequestration and extreme Mg depletion in serpentinized peridotite clasts from the Devonian Solund basin, SW-Norway

Cited by 52 publications

References 74 publications

Experimental study of the carbonation of partially serpentinized and weathered peridotites

Experimental study of the carbonation of partially serpentinized and weathered peridotites

Metasomatism in Subduction Zones of Subducted Oceanic Slabs, Mantle Wedges, and the Slab-Mantle Interface

Element scavenging by recently formed travertine deposits in the alkaline springs from the Oman Semail Ophiolite

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