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Showing 1 to 20 of 35 for “"Evaporites"”.
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A geochemical study of neoproterozoic palaeo-evaporites and their possible role in metallogenesis in the Damara Belt of Namibia
… of the world. Data on the nature of these former evaporites and their associated connate fluids, however, is frequently quite sparse, and the link between the ore deposits and the source evaporites is usually intuitive, at best. In an attempt to characterise such evaporite-derived fluids and their …
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Depositional environments and diagenesis of carbonates and associated evaporites, Frobisher-Alida interval, Madison Group (Mississippian), Williston Basin, northwestern North Dakota
<p> The Frobisher-Alida interval is a subsurface, marker-defined unit, one of several units designated for rocks of the Madison Group (Mississippian) in the Williston Basin of North Dakota. The Frobisher Alida conformably overlies the Tilston interval and is conformably overlain by the Ratcliffe …
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The Sequence Stratigraphic Context of Mixed Basin Margin Evaporites in the Harrisburg Member of the Permian Kaibab Formation, Northern Arizona and Southern Utah
… Formation is a mixed carbonate system including evaporites and siliciclastics deposited on a westward dipping epeiric carbonate ramp during the middle Permian in northern Arizona, southern Utah, and eastern Nevada. It consists of the Fossil Mountain Member deposited in open-marine conditions and …
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Controls on mineralisation in the Cadeby formation (lower magnesian linestone)
… is also related to former displacive evaporites, either by direct replacement or by precipitation in voids resultant from evaporite dissolution. Diagenesis is complex with different mechanisms of dolomitization, evaporite replacement and dedolomitization; mineralization is related to …
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Petrography of the Midale subinterval in the Bottineau and Renville counties area, North Dakota
… of the Rival subinterval and the overlaying evaporites of the Ratcliffe interval. Dolomitization of the limestones took place shortly after deposition by the circulation of magnesium-rich brines during the deposition of the interbedded and overlying evaporites. Following dolomitization and …
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FACIES AND DIAGENESIS ANALYSES OF THE FORT TERRETT FORMATION OF THE LOWER CRETACEOUS EDWARDS GROUP, NEAR JUNCTION, TEXAS
… unit, a dolomitic unit, and the Kirschberg evaporites. Wilkerson (2018) provided the addition of the Walnut Formation as part of the local stratigraphy. However, both the Walnut Formation and Kirschberg evaporites have been omitted from the local stratigraphy. In the Junction area, measured …
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ΣΥΜΒΟΛΗ ΣΤΗ ΓΝΩΣΗ ΤΟΥ ΝΕΟΓΕΝΟΥΣ ΚΑΙ ΤΗΣ ΓΕΩΛΟΓΙΑΣ ΚΑΙ ΟΡΙΟΘΕΤΗΣΗΣ ΤΩΝ ΖΩΝΩΝ ΙΟΝΙΑΣ ΚΑΙ ΠΡΟΑΠΟΥΛΙΑΣ ΣΕ ΣΧΕΣΗ ΜΕ ΠΕΤΡΕΛΑΙΟΓΕΩΛΟΓΙΚΕΣ ΠΑΡΑΤΗΡΗΣΕΙΣ ΚΥΡΙΩΣ ΣΤΑ ΝΗΣΙΑ ΣΤΡΟΦΑΔΕΣ, ΖΑΚΥΝΘΟ, ΚΕΦΑΛΛΗΝΙΑ
… WELLS. ALSO THE WAY OF MOVEMENTS OF THE TRIASSIC EVAPORITES (DIAPIRS AND NEODIAPIRS) WAS EXAMINED AS WELL AS DETAILED REMARKS FOR THE NEOGENE AND QUATERNARY SEDIMENTS WERE MADE. FINALLY USEFUL REMARKS FOR THE PETROLEUM POTENTIAL OF THE AREAS ARE CONCLUDED.
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Diagenetic controls of reservoir quality in the Mississippian Wayne Beds in the Williston Basin, Bottineau County, North Dakota
… beneath paleohighs where the overlying Glenburn evaporites were removed due to erosion than beneath paleolows where the Glenburn is still present. Sulfur stable-isotope data suggest that the sulfur in these pore-bridging anhydrites originated in the Glenburn evaporites. </p><p> The amount of …
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Hydrogen Storage Potential of the Salina Group, Appalachian and Michigan Basins
… and its associated costs of the Salina Group evaporites in two adjacent sedimentary basins, the Appalachian Basin and the Michigan Basin. The Michigan Basin Salina Group contains three evaporite units suitable for hydrogen storage, the A1, A2, and B evaporites. The Appalachian Basin includes a …
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Speleogenetic Evolution and Geological Remote Sensing of the Gypsum Plain, Eddy County, New Mexico
<p>Permian evaporites of the Gypsum Plain region of the Delaware Basin host extensive karst phenomena, as well as unique diagenetic alterations of host strata. Because of the complex, poorly understood hydrogeologic system, little has been established concerning the relation and evolution of the …
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Paleohydrogeology of the Alberta Basin, Canada
… and sediment decompaction, and dissolution of evaporites.</p> <p>Fluid flow results indicate the development of compaction-driven, topography-driven and buoyancy-driven flows in the basin during the 100 million year history of basin deposition, uplift and erosion. Compaction-driven flow …
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Evolution of oceanic margins : rifting in the Gulf of California and sediment diapirism and mantle hydration during subduction
… Basin, central Gulf of California. In rifts, evaporites form under conditions unique to the latest stages of continental rupture, and the presence, age, thickness, and shape place new constraints on the history of early rifting there. Chapter 3 presents numerical experiments that show that …
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The role of gypsum in Cu-Co ore genesis within the Upper Miocene Boleo deposit of the Santa Rosalía Basin, Baja California Sur, México
… of gypsum cycles indicates coeval deposition of evaporites and ores. The study identifies segmented normal fault arrays as feeder zones for metal-enriched hydrothermal fluids, with subsurface gypsum bodies acting as halogen suppliers. These feeders exhibit distinct metal tonnages and ratios, …
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Evolution of oceanic margins : rifting in the Gulf of California and sediment diapirism and mantle hydration during subduction
… Basin, central Gulf of California. In rifts, evaporites form under conditions unique to the latest stages of continental rupture, and the presence, age, thickness, and shape place new constraints on the history of early rifting there. Chapter 3 presents numerical experiments that show that …
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GEOPHYSICAL DELINEATION OF MEGAPOROSITY AND FLUID MIGRATION PATHWAYS FOR GEOHAZARD CHARACTERIZATION WITHIN THE DELAWARE BASIN, CULBERSON COUNTY, TEXAS
… surveyed proximal to the study area in evaporites throughout the Castile Formation outcrop; minimal hazards, in comparison to the Castile Formation, have been documented in the Rustler Formation.</p> <p> A TR-5 OhmMapper capacitively-coupled resistivity meter was used to acquire …
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LIDAR-BASED DELINEATION OF KARST FEATURES IN THE GYPSUM PLAIN, EDDY COUNTY, NEW MEXICO AND CULBERSON COUNTY, TEXAS
… and Salado strata. These extensive Permian-age evaporites host significant karst phenomena as a result of the region's complex hydrogeologic system which has continuously evolved since the early Paleogene. Karst features that manifest surficially as sinkholes when breached range from extensive …
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Geology of the passive margin off New England
… crust. Intra-rift sediments consist of clastics, evaporites, and volcanics. Continental separation occurred and sea-floor spreading began 195-190 my B.P. The boundary between "normal" continental crust and crust radically altered by fracturing and intrusion may be represented by a pronounced …
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Using 34-S as a Tracer of Dissolved Sulfur Species from Springs to Cave Sulfate Deposits in the Cerna Valley, Romania
… since the Cerna Valley does not possess marine evaporites. The limestones of the Cerna Valley are host to a number of caves, which possess relatively large deposits of sulfates and exotic morphologic features that suggest speleogenesis by sulfuric acid. 𝛅34S of the sulfates relates to sulfide …
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Geology of the Saltville-Broadford area
… Maccrady Formation is a sequence of evaporites. Halite and gypsum constitute the chief economy of the Saltville area.
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Depositional environments, ichnology and diagenesis of the upper Frobisher-Alida beds of the Elkhorn Ranch and Roughrider fields of western North Dakota
… and culminating in a thick unit of sublittoral evaporites. Sublittoral rocks dominate the basal lithologies throughout the study area. Depositional environments illustrate a regressive sequence: normal marine wackestones and packstones; marginally restricted wackestones; restricted wackestones …
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