Dolerite-pegmatites from the Whin Sill near Barrasford, Northumberland

Randall, B. A. O.

doi:10.1144/pygs.47.3.249

Cited by 11 publications

(10 citation statements)

References 20 publications

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“…The XRF analysis (Table 3) revealed the chemical composition of the material used in this study (U and W) and the dolerite (ND) described in Randall (1989), both sourced from Barrasford, are practically identical indicating the analyses are comparable. The main differences are slightly less silicate and aluminium and magnesium oxide contents against slightly increased content of iron, titanium and calcium oxides, respectively.…”

Section: Physicochemical Changes Induced By Dissolution In Batch Reactormentioning

confidence: 72%

Dissolution experiments on dolerite quarry fines at low liquid-to-solid ratio: a source of calcium for MICP

Casas

Schaschke

Akunna

et al. 2019

Environmental Geotechnics

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Section: Physicochemical Changes Induced By Dissolution In Batch Reactormentioning

confidence: 72%

Dissolution experiments on dolerite quarry fines at low liquid-to-solid ratio: a source of calcium for MICP

Casas

Schaschke

Akunna

et al. 2019

Environmental Geotechnics

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“…The dolerite Whin Sill and Midland Valley Sills are primarily composed of Ca plagioclase (70-80% An in some places), and pyroxene (orthopyroxene, pigeonite and Carich pyroxene). Amphiboles, biotites and chlorites are also present in minor amounts (Randall, 1989). This material has a total carbon capture potential of 4.9 GtCO 2 (EW ex situ), 2.9 GtCO 2 (MC ex situ) and 4.3 GtCO 2 (in situ), using the chemical composition presented in Table A1.…”

Section: The Whin Sill and Midland Valley Sill Complexmentioning

confidence: 99%

“…Mull lava field (Kerr, 1995) Whin Sill dolerite Randall, 1989 Antrim Basalts ( Barrat and Nesbitt, 1996) Central lowland Carboniferous (Macdonald et al, 1977) The Lizard Complex (Green, 1964) Skye Lava field (Bell et al, 1996) Cheviot lava (Thirlwall, 1981) Old Red Sandstone Lava, Cheviot (Thirlwall, 1983) Grampian Gabbro (Viete et al, 2010) Borrowdale Lava (basaltic andesite; Fitton, 1972) Rhombell lava (Kokelaar, 1986) Shetland Esha Ness (Thirlwall, 1981) Shetland ophiolite (BGS, 1985) Eycott (Millward et al, 2000) SiO2 …”

Section: Table A1mentioning

confidence: 99%

The potential of enhanced weathering in the UK

Renforth¹

2012

International Journal of Greenhouse Gas Control

188

191

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a b s t r a c tEnhanced weathering is the process by which carbon dioxide is sequestered from the atmosphere through the dissolution of silicate minerals on the land surface. The carbon capture potential of enhanced weathering is large, yet there are few data on the effectiveness or engineering feasibility of such a scheme. Here, an energy/carbon balance is presented together with the associated operational costs for the United Kingdom as a case study. The silicate resources are large and could theoretically capture 430 billion tonnes (Gt) of CO 2 . The majority of this resource is contained in basic rocks (with a carbon capture potential of ∼0.3 tCO 2 t −1 rock). There are a limited number of ultrabasic formations (0.8 tCO 2 t −1 rock) with a total carbon capture potential of 25.4 GtCO 2 . It is shown that the energy costs of enhanced weathering may be 656-3501 kWh tCO 2 −1 (net CO 2 draw-down, which accounts for emissions during production) for basic rocks and 224-748 kWh tCO 2 −1 for ultrabasic rocks. Comminution and material transport are the most energy intensive processes accounting for 77-94% of the energy requirements collectively. The operational costs of enhanced weathering could be £44-361 tCO 2 −1 ($70-578 tCO 2 −1 ) and £15-77 tCO 2 −1 ($24-123 tCO 2 −1 ) for basic and ultrabasic rocks respectively. Providing sufficient weathering rates full exploitation of this resource is not possible given the environmental and amenity value of some of the rock formations. Furthermore, the weathering rate and environmental impact of silicate mineral application to the land surface is not fully understood, and further investigation in this area is required to reduce the uncertainty in the estimated costs presented here.

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“…Dolerite fines were sourced from Barrasford quarry (Barrasford, Hexham, NE48 4AP, United Kingdom; operated by Tarmac Ltd.). The chemical composition and mineralogy of the quarry materials are described in detail in Randall (1989) and the physical properties, chemical composition, and calcium chemical weatherability of the material discussed previously by Casas et al (2019) .…”

Section: Methodsmentioning

confidence: 99%

Dolerite Fines Used as a Calcium Source for Microbially Induced Calcite Precipitation Reduce the Environmental Carbon Cost in Sandy Soil

et al. 2020

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Microbial-Induced Calcite Precipitation (MICP) stimulates soil microbiota to induce a cementation of the soil matrix. Urea, calcium and simple carbon nutrients are supplied to produce carbonates via urea hydrolysis and induce the precipitation of the mineral calcite. Calcium chloride (CaCl 2) is typically used as a source for calcium, but basic silicate rocks and other materials have been investigated as alternatives. Weathering of calcium-rich silicate rocks (e.g., basalt and dolerite) releases calcium, magnesium and iron; this process is associated with sequestration of atmospheric CO 2 and formation of pedogenic carbonates. We investigated atmospheric carbon fluxes of a MICP treated sandy soil using CaCl 2 and dolerite fines applied on the soil surface as sources for calcium. Soil-atmosphere carbon fluxes were monitored over 2 months and determined with an infrared gas analyser connected to a soil chamber. Soil inorganic carbon content and isotopic composition were determined with isotope-ratio mass spectrometry. In addition, soil-atmosphere CO 2 fluxes during chemical weathering of dolerite fines were investigated in incubation experiments with gas chromatography. Larger CO 2 emissions resulted from the application of dolerite fines (116 g CO 2-C m −2) compared to CaCl 2 (79 g CO 2-C m −2) but larger inorganic carbon precipitation also occurred (172.8 and 76.9 g C m −2 , respectively). Normalising to the emitted carbon to precipitated carbon, the environmental carbon cost was reduced with dolerite fines (0.67) compared to the traditional MICP treatment (1.01). The carbon isotopic signature indicated pedogenic carbonates (δ 13 C av = −8.2 ± 5.0) formed when dolerite was applied and carbon originating from urea (δ 13 C av = −46.4 ± 1.0) precipitated when CaCl 2 was used. Dolerite fines had a large but short-lived (<2 d) carbon sequestration potential, and results indicated peak CO 2 emissions during MICP could be balanced optimising the application of dolerite fines.

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Dolerite-pegmatites from the Whin Sill near Barrasford, Northumberland

Cited by 11 publications

References 20 publications

Dissolution experiments on dolerite quarry fines at low liquid-to-solid ratio: a source of calcium for MICP

Dissolution experiments on dolerite quarry fines at low liquid-to-solid ratio: a source of calcium for MICP

The potential of enhanced weathering in the UK

Dolerite Fines Used as a Calcium Source for Microbially Induced Calcite Precipitation Reduce the Environmental Carbon Cost in Sandy Soil

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