Assessing hydrofacies and hydraulic properties of basaltic aquifers derived from geophysical logging

Teramoto, Elias Hideo; Engelbrecht, Bruno Zanon; Kiang, Chang Hung

doi:10.1590/2317-4889202020200013

Cited by 8 publications

(6 citation statements)

References 67 publications

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“…Contrary to the numerical model of [7], our model assumes that the main rivers crossing the basin (e.g., the Paraná, Paraguay and Uruguay rivers) do not represent discharge zones due to the thickness of basalts (>1000 m) beneath them. As described by several authors [44][45][46], the basalt floods consist as persistent alternating thick intervals with extremely low permeabilities (interior flows) and thin permeable intervals (top flows). Given this situation, the significant thick basalt layers serve as very effective barriers preventing seepage flow from GAS to the rivers.…”

Section: Model Discussionmentioning

confidence: 92%

Regional Groundwater Modeling of the Guarani Aquifer System

Gonçalves

Teramoto

Chang

2020

Water

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The Guarani Aquifer System (GAS) is a strategic transboundary aquifer system shared by Brazil, Argentina, Paraguay and Uruguay. This article presents a groundwater flow model to assess the GAS system in terms of regional flow patterns, water balance and overall recharge. Despite the continental dimension of GAS, groundwater recharge is restricted to narrow outcrop zones. An important part is discharged into local watersheds, whereas a minor amount reaches the confined part. A three-dimensional finite element groundwater-flow model of the entire GAS system was constructed to obtain a better understanding of the prevailing flow dynamics and more reliable estimates of groundwater recharge. Our results show that recharge rates effectively contributing to the regional GAS water balance are only approximately 0.6 km3/year (about 4.9 mm/year). These rates are much smaller than previous estimates, including of deep recharge approximations commonly used for water resources management. Higher recharge rates were also not compatible with known 81Kr groundwater age estimates, as well as with calculated residence times using a particle tracking algorithm.

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Section: Model Discussionmentioning

confidence: 92%

Regional Groundwater Modeling of the Guarani Aquifer System

Gonçalves

Teramoto

Chang

2020

Water

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“…This requires that the basalt formations are, at least locally, highly porous and permeable, and have large surface areas available for reactions. Basalt lava piles are widely recognized as voluminous aquifers in many regions, including western India (Limaye, 2010), southern Ethiopia (McKenzie et al, 2001, and southern Brazil (Navarro et al, 2020); however, flow properties (e.g., flow rate) and the spatial distribution of springs are often heterogeneous and unpredictable. A general model of basalt lava aquifers (e.g., Kulkarni et al, 2000) emphasizes the importance of highly permeable, horizontal joint systems within coherent lavas, and horizontal, inter-lava breccia layers in controlling the lateral transport of fluids.…”

Section: Petrophysical Conditionsmentioning

confidence: 99%

“…Basalt rock is intrinsically variably permeable in proportion to the volume, size, and interconnectedness of the pores, whether they are intracrystalline (e.g., diktytaxitic texture) or contain vesicles (i.e., fossil bubbles). Porosity values measured in basalt samples typically range from 0 to ∼85% (Navarro et al, 2020); with intracrystalline porosities of 0 to ∼14% (e.g., Franzson et al, 2001). However, total porosity is moderated by the precipitation and dissolution (i.e., paragenesis) of secondary phases like zeolites and silica (Neuhoff et al, 1999).…”

Section: Petrophysical Conditionsmentioning

confidence: 99%

“…However, total porosity is moderated by the precipitation and dissolution (i.e., paragenesis) of secondary phases like zeolites and silica (Neuhoff et al, 1999). Permeability is estimated from measured porosity with the power-law Kozeny-Carman model (e.g., Navarro et al, 2020). Calculated bulk permeabilities vary over several orders of magnitude (10 0 -10 4 mD; 10 −10 -10 −17 m 2 ; e.g., Navarro et al, 2020), with measured intrinsic permeability of avesicular basalt ranging from (10 0 -10 1 mD; e.g., Franzson et al, 2001).…”

Section: Petrophysical Conditionsmentioning

confidence: 99%

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Geological carbon storage in northern Irish basalts: prospectivity and potential

Andrews

2023

Front. Clim.

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Carbon mineralization and storage in basaltic rock sequences is a developing technology but faces challenges with uptake and increases in scale. Northern Ireland (UK) is a useful analog for many parts of the world where thick basalt sequences could be used to aid in reaching carbon reduction and removal targets. Here I reanalyze and reinterpret available lithological, geochemical, and geophysical data to assess carbon storage potential. The physical and geochemical properties of the basalts are indistinguishable from those used for successful carbon sequestration in Iceland and Washington State (USA). Based on the thickness, composition, and potential permeability, I propose that this is a viable location for a series of small-volume stores (total volume ~9–12 MTCO2) suitable for capture at industrial point-sources or purpose-built CO2 “harvesting” facilities. The case for exploiting the CO2 storage potential in Northern Ireland is strengthened by (1) an increasingly urgent need to find socially and economically just decarbonization pathways needed to meet NI's targets, (2) increasing realization among policy experts that point-source CO2 capture and industrial decarbonization will be insufficient to meet those goals, due in part, to the size of the agricultural sector, and (3) the coincidence with plentiful renewable energy and geothermally-sourced industrial heat. These serendipitous relationships could be leveraged to develop CO2-“farms” where direct air capture operations are supplied by renewable energy (biomass and geothermal) and on-site geological storage. I envisage that these sites could be supplemented by CO2 from locally produced biomass as farmers are encouraged to transition away from raising livestock. Because CO2 can be captured directly from the atmosphere or via suitable biomass anywhere, NI's small size and position on the periphery of the UK and Europe need not be a disadvantage. Instead, NI's access to geological storage, renewable energy, and agricultural land may be a boon, and provide new opportunities to become a leader in carbon removal in basalt-covered regions.

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“…3C). The vesicles show primary porosity of the rocks which are generated via degassing during lava extrusion (Navarro et al, 2020).…”

Section: Field Descriptions and Petrographymentioning

confidence: 99%

Petrology and geochemistry of Plio-Quaternary high-Nb basalts from Shahr-e-Babak area:Insights into post-collision magmatic processes in the Kerman Cenozoic Magmatic Arc

Moradi

Khaksar

Nazarinia

et al. 2022

GeA

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Post-collision Pliocene-Quaternary basaltic rocks outcrop in the Kerman Cenozoic Magmatic Arc (KCMA) to the northwest and east of Shahr-e-Babak city. These porphyritic and vesicular basaltic rocks are composed essentially of clinopyroxene, olivine, and plagioclase. These basalts display alkaline affinity and negative Ta, Zr, Rb anomaly, but slightly negative Nb anomaly, relative to elements with similar compatibility, and positive Ba, K, Sr anomaly, suggesting their magma source related to subduction-accretion with implication of subducted slab derived components to the source. In the primitive mantle and chondrite normalized diagrams, these rocks show trace elements (except depletion in Nb, Ta) and Rare Earth Element (REE) patterns similar to the Ocean Island Basalts (OIB) and share trace and major element characteristics similar to High-Nb Basalts (HNBs). Geochemical analyses for major and trace elements suggest that the Shahr-e-Babak HNBs have undergone insignificant crustal contamination and minor olivine + Fe-Ti oxide ±clinopyroxene fractional crystallization. These HNBs derived from a partial melting (~5%) of garnet-peridotite mantle wedge, which have already metasomatized by overlying sediments, fluids, and adakitic (slab-derived) melts as major metasomatic agents in post-collision setting in the KCMA. We conclude that asthenospheric upwelling arising from slab break-off followed by the roll-back of subducting Neotethys slab also triggered metasomatized peridotite mantle wedge and caused its partial melting in the subduction zone.

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Assessing hydrofacies and hydraulic properties of basaltic aquifers derived from geophysical logging

Cited by 8 publications

References 67 publications

Regional Groundwater Modeling of the Guarani Aquifer System

Regional Groundwater Modeling of the Guarani Aquifer System

Geological carbon storage in northern Irish basalts: prospectivity and potential

Petrology and geochemistry of Plio-Quaternary high-Nb basalts from Shahr-e-Babak area:Insights into post-collision magmatic processes in the Kerman Cenozoic Magmatic Arc

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