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Showing 1 to 20 of 24 for “"Siliciclastics"”.
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DEPOSITIONAL SYSTEMS INTERPRETATION OF EARLY PERMIAN MIXED SILICICLASTICS AND CARBONATES, MIDLAND BASIN, TEXAS
In this study, a core from the Midland basin of West Texas was examined in detail to determine the depositional setting of an Upper Wolfcampian and Lower Leonardian-aged mudstone succession. The studied sediments were deposited close to the center of the Midland Basin in a deep water, mixed …
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High-Resolution Sequence Stratigraphy of Late Mississippian (Chesterian) Mixed Carbonates and Siliciclastics, Illinois Basin
… by skeletal limestone and shale-dominated siliciclastics. The sequences can be bundled into sequence pairs and composite sequences. Composite sequences are composed of 4 sequences and are bounded by better developed disconformities that commonly coincide with biostratigraphic zone …
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Mixed Carbonate-Siliciclastic Sequence Development and Chemostratigraphy On a Distal Foreland During Miocene Glaciation, Eastern Saudi Arabia
… the proximal foredeep in Iran. Deposition of the siliciclastics was driven by lowered sea levels, and moderately humid to arid climate. Rising sea levels pushed the siliciclastics updip allowing mixed siliciclastics and carbonates to form downdip, under semi-arid climate and locally hypersaline …
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Architectural Models for Lower Pennsylvanian Strata in Dickenson/Wise County, Southwest Virginia: A Reservior Case Study
… relative sea level fluctuations. Coal-bearing siliciclastics of the eastern facies belt are fluvio-deltaic in origin, with sediment derived from the erosion of low-grade metamorphic and Grenvillian-Avalonian terranes of the Alleghanian orogen to the southeast. Elongate NNE trending …
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Depositional system and source rock potential of the Sharon Springs Formation in Colorado
… Highstand, and an overall progradation of siliciclastics into the Western Interior Seaway. These units gradually decrease over time in calcite content associated with chalk filled fecal pellets, to clay and quartz dominated deposits with a large constituent of pyrite. This interval has the …
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Depositional Facies and Petrophysical Characterization of the Leonardian Carbonate (Lower Clear Fork), Tex-Mex, S.E. Field, Central Basin Platform, West Texas
… with anhydrite, minor clay minerals, and siliciclastics. The high heterolithic nature of the reservoir makes efficient recovery of hydrocarbons difficult. This situation requires an understanding of the variability in depositional facies in terms of mineralogy, depositional textures and …
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Sequence Stratigraphy and Paleoecology of the Late Mississippian Little Stone Gap Member in the Appalachians of West Virginia
… differentiation of habitats into carbonates and siliciclastics thereby demonstrating the importance of interpreting ordination patterns within a facies framework. The combined DCA analysis of samples and taxa indicates that bryozoans, crinoids and rugose corals preferentially occur in carbonate …
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PALAEOECOLOGY, PALAEOENVIRONMENTAL ANALYSIS AND THEIR APPLICATION TO SEQUENCE STRATIGRAPHY: LOWER CRETACEOUS, LUSITANIAN BASIN, PORTUGAL
… of narrow shelf with minor wave reworking. Siliciclastics were introduced by sand and gravel-load river dominated deltas with little reworking of the sediment at the channel mouths. This was characterised by the development of a clastic beach-barrier at Ericeira and a 'cool-water' carbonate …
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Fluctuations in resistivity in the Tuscaloosa Marine Shale, southwest Mississippi and southeast Louisiana
… wettability, and the percentage of clays and siliciclastics. All of these characteristics combined produce the resistivity signature that can be seen in the oil producing basal portion of the Tuscaloosa Marine Shale throughout the proposed play area.
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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
… 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 the overlying …
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Lacustrine Deltaic Deposits of the Sandstone Tongue of the Wasatch Formation, Fossil Basin, Wyoming
… transgression separating deposition of the siliciclastics. The uppermost siliciclastic sequence is succeeded by lacustrine carbonates indicating a major lacustrine transgression.</p> <p>The sandstone tongue of the Wasatch Formation in Fossil Basin documents a unique record of deltaic …
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Sequence Stratigraphy of the Bridal Veil Falls Limestone, Carboniferous, Lower Oquirrh Group, on Cascade Mountain, Utah: A standard Morrowan Cyclostratigraphy for the Oquirrh Basin
… Morrowan time. Sandstones reflect transport of siliciclastics from the incipient Weber shelf (located to the NE) during episodes of sea-level lowstand. The Bridal Veil Falls Limestone is subdivided into 21, third and fourth order depositional sequences ranging in thickness from 3 to 60 meters, …
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Esforço reprodutivo de Mussismilia braziliensis (Verrill, 1868) (Cnidaria, Scleractinia, Mussidae) no complexo recifal dos Abrolhos, BA, Brasil
… This area presents the highest contribution of siliciclastics to the sediment depositing on the reefs and has also the highest cover of Palythoa caribaeorum. We suggested that M braziliensis invest a lot of energy in egg production to increases its chance of survival of the species in more …
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Evolution of early Proterozoic passive-margin carbonate platform, Rocknest Formation, Wopmay Orogen, N.W.T., Canada
… cycles of "lagoonal" mixed carbonates and siliciclastics, that grade up into intertidal stromatolitic dolomites; cyclic facies pass eastward into non—cyclic siliclastics of central and eastern "lagoon". The shelf was terminally drovmed during attempted subduction of the margin. Individual …
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Palaeoecology and taxonomy of the macrobenthic fauna from the Upper Cretaceous Ajlun Group, southern Jordan
… environments via marginal marine siliciclastics to an area of carbonate precipitation. So far, very little is known about the fauna and the depositional environment of the group, especially of the transitional marginal marine part. Also, in depth studies of the Cretaceous fauna of …
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Sequence Stratigraphy and Source Rock Characterization of Organic-Rich Shales Within the Jurassic Smackover Formation, Conecuh Embayment, Alabama, U.S.A.
… falls in sea level allowing a greater influx of siliciclastics into the embayment. The relative sea level falls may be a result of imposing higher order sequences on the third-order sequence. In the model presented here the Smackover Formation is divided into three sequences with the Smackover …
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Determination of Heterogeneity by High-Resolution Seismic Reservoir Characterization in the Heavy Oil Temblor Reservoir of Coalinga Field, California
… focuses on analysis and subsurface imaging of siliciclastics rocks on steam-affected 3D poststack seismic data, merged from different vintages, from the Temblor Formation in the Coalinga heavy oil reservoir in the San Joaquin basin, California. The objective was identification, delineation, and …
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Reservoir Characterization of the Utica Shale Play Using Well Log Data in Columbiana, Ohio
… structural highs correlating with carbonate-rich siliciclastics or thickened carbonate platform, and siliciclastic poor or thin shale intervals. Areas with increased clay content are adjacent to these structural highs and correlate with increased levels of TOC, creating localized sub-basins, or …
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Diagenetic controls on porosity, thermal history, and hydrocarbons in the Wolfcamp A, eastern Midland Basin, Texas
… to rock-water interaction with more radiogenic siliciclastics. Afterwards, in the Ochoan, even more highly saline evaporated seawater (17.4 – 26.8 wt%) refluxed and mixed with or displaced the Leonardian or Guadalupian refluxed fluid; it precipitated anhydrite cement during active reflux, prior …
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Spatial and Temporal Relationships between Carlin-style Gold and Polymetallic Mineralization at the Deep Cove Gold-Silver Deposit, Lander County, Nevada
… and carbonate sandstones. At the contact of the siliciclastics overlying limestone, there manto-style replacement sulfides bodies locally formed as a result of a strong pH gradient. Although all Carlin-style ore zones display similar associated decarbonatization and silicification alteration, the …
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