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Showing 1 to 11 of 11 for “"basinal brines"”.
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K-Metasomatism in Uppermost Precambrian Rocks in West-Central Wisconsin and Southeastern Missouri
… fluids for I/S of the younger episodes are basinal brines either driven by gravity or expelled by continental collisions during the Acadian and Alleghanian orogenies. However, sources and pathways of such fluids are yet to be determined.
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Graphite-bearing and graphite-depleted basement rocks in the Dufferin Lake Zone, south-central Athabasca Basin, Saskatchewan
… to be the result of mixing between oxidized basinal brines and basement-derived reduced fluids/gases, and/or reduced basement rocks. Graphite and/or its breakdown products are suggested to be responsible for uranium mineralization by acting as a reductant that could trigger deposition of …
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Potassic alteration of Cambrian-Ordovician sandstones and Precambrian basement rocks of the North American midcontinent
… Sandstone is attributed to regional migration of basinal brines caused by groundwater recharge on uplifted arches.
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Non-traditional sources of critical minerals from the Western Canada Sedimentary Basin
… coal combustion by-products (CCBs) and Li from basinal brines. The first phase of this work used machine learning to identify geochemical indicators of REE enrichment in sedimentary strata which can be used to predict where elevated abundances may be found and to inform supplementary sampling …
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Sequence Development and Dolomitization of a Late Jurassic Giant Oil Reservoir, Arab-D Reservoir, Hawiyah (GHAWAR) and Harmaliyah Fields, Saudi Arabia
… re-equilibrated with the increasingly warm basinal brines resulting in replacement of cores, and dolomite cementation by rim overgrowth. Progressive plugging of higher dolomites earlier, caused some of these to retain slightly heavier δ¹⁸O values and marine seawater Sr isotope values while …
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Comparative Geochemical Analysis of Ordovician and Mississippian Cherts in Relation to the Northern Arkansas and the Tri-State Mississippi Valley-type Ore Districts
… from a mixing and cooling of these sedimentary basinal brines by meteoric or connate waters. Reduction of sulfate to sulfide is one of the possible mechanisms by which MVT ore precipitation may be recognized. Organics sequestered in shales result in general enrichment of uranium (U) through …
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A study of the berg Aukas-type Pb-Zn-V deposits in the Otavi mountain land, Namibia
… advancing diagenetic stages. The influence of basinal brines enriched in radiogenic strontium as a consequence of the reaction with Rb-bearing phases, especially detrital (clay) minerals hosted by underlying basement rocks, is considered to be most likely. Stable isotope investigations carried …
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Regional dolomitization of Early Ordovician, Upper Knox Group, Appalachians
… modified during initial stabilization by marine brines during progradation of each cycle, and by mixed fresh/marine waters of the Knox aquifer associated with unconformity development. Much "early" dolomite however, remained metastable into the deep burial environment where it was replaced and …
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Spatial and Temporal Variations in Composition and P-T Conditions of Ore-Forming Fluids Along Structures Controlling Unconformity-Related Uranium Deposits in the Athatbasca Basin, Saskatchewan
… formed through interaction between oxidized basinal fluids and reduced basement-derived fluids or reducing lithologies. However, the factors that control localization of orebodies within limited areas along the structures remain to be determined. This study tackles this problem by examining …
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Characterization of Fluids Associated with Vein-type Uranium Mineralization in the Beaverlodge Uranium District, Northern Saskatchewan: Field, Petrographic, Fluid Inclusion and C-O Isotope Studies
… versus N2/Ar, the data overlap the fields of basinal brines and meteoric water. Fluid pressures were estimated by using fluid inclusion isochores in the H2O-NaCl system. The calculated fluid pressures mainly range from 5 to 123 bars, corresponding to a hydrostatic load of 46 to 1256 m for the …
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Geochemical modeling of diagenesis, hydrothermal alteration, and unconformity-related uranium mineralization in the Athabasca Basin, Saskatchewan, Canada
… formed through interactions between oxidizing basinal fluids and reducing basement-derived fluids or basement lithologies under diagenetic-hydrothermal conditions. However, there is controversy regarding whether U is ultimately derived from the basin or the basement, fluid flow mechanisms …