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Journal Article
Published: 01 December 2017
American Mineralogist (2017) 102 (12): 2367-2380.
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Series: AAPG Memoir
Published: 01 January 2016
DOI: 10.1306/13541966M1103665
EISBN: 9781629812748
... Abstract Permeability measurements made using innovative techniques on 36 intact samples from five wells in south Texas provide the basis for a dual-porosity reservoir simulation model for the Eagle Ford Shale (Upper Cretaceous). In the model, matrix storage feeds a network of progressively...
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Series: GSA Special Papers
Published: 01 October 2015
DOI: 10.1130/2015.2518(11)
Series: Geological Society, London, Special Publications
Published: 01 January 2015
DOI: 10.1144/SP421.6
EISBN: 9781862399549
... Abstract Basement rocks tend to have negligible primary (rock matrix) porosity and, where present, almost all porosity is fracture-related. An insight into fracture type and distribution is therefore of importance when attempting to predict potential flow zones in hydrocarbon reservoirs...
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..., well-foliated biotite-quartz-feldspar matrix with abundant augen of white feldspar and quartz. The fine layering in the block of granofels is truncated at the contact with surrounding matrix, and the reaction rim around the ultramafic block indicates lack of chemical equilibrium—these features plus...
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Series: GSA Special Papers
Published: 01 June 2011
DOI: 10.1130/2011.2478(11)
... Volcaniclastic carbonatites in southeast Zambia contain dolomitic melt lapilli, in which high-Cr chromite phenocrysts indicate direct eruption from the mantle. There are no lava flows. Vent tuffisite, with dolomite lapilli in a matrix of dolomite + iron oxides, provides the least contaminated...
Series: GSA Special Papers
Published: 01 June 2011
DOI: 10.1130/2011.2478(14)
Series: GSA Special Papers
Published: 01 January 2007
DOI: 10.1130/2008.2437(08)
.... Palynology of the ejecta matrix provides a middle to late Turonian date for the Avak impact event. The Avak structure (71°15.1′N, 156°27.3′W) is the northernmost of 11 Cretaceous-age impacts documented to occur within or immediately peripheral to a Cretaceous-age seaway in western North...
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Series: GSA Special Papers
Published: 01 January 2006
DOI: 10.1130/2006.2408(4.1)
...; therefore, they have high matrix porosity and permeability. Densely welded tuffs have higher bulk density and, therefore, low matrix porosity and permeability, but are brittle and so are more highly fractured. Interest in the hydrologic properties of tuffs has grown within the past ∼35 yr in the United...
Series: GSA Special Papers
Published: 01 January 2006
DOI: 10.1130/2006.2416(01)
... contains an upper laminated zone that is underlain by an indurated carbonate sheet. Carbonate nodules and chalky micritic matrix materials underlie the sheet carbonate. The calcic paleosols display carbonate morphology ranging from stage IV to stage VI. The calcic pedocomplexes also possess distinct...
Series: GSA Special Papers
Published: 01 January 2006
DOI: 10.1130/2006.2405(10)
... complexes the most reliable indicator of Phanerozoic-style tectonics. Accretionary mélange complexes result from the juxtaposition of oceanic crust and pelagic sediments in a matrix of arc-derived constituents and may be recognized even after high-grade metamorphic events. At least three potential...
Series: GSA Special Papers
Published: 01 January 2006
DOI: 10.1130/2006.2404(12)
... of this evolution to the evolution of interconnected surface-water basins. Karst aquifers generally display matrix, fracture, and conduit permeability with contrasts in effective hydraulic conductivity of many orders of magnitude. Dispersed recharge into the matrix and fracture permeability provides most...
Series: GSA Special Papers
Published: 01 January 2006
DOI: 10.1130/2006.2404(14)
... matrix. In order to obtain evidence of pathway changes, we sampled three karst springs of varying size and maturity using data loggers for conductivity and water level, and storm water samplers for suspended sediment. The largest spring (Arch Spring) had the lowest conductivity of the three springs...
Series: GSA Special Papers
Published: 01 January 2006
DOI: 10.1130/2006.2404(17)
... Karst aquifers with high primary-porosity matrix, such as the Floridan aquifer, have the potential for movement of water between conduits and matrix, with important implications for karst development and the maintenance of groundwater quality. The Santa Fe River Sink and River Rise conduit...
Series: GSA Special Papers
Published: 01 January 2006
DOI: 10.1130/2006.2404(23)
... Lititz Spring in southeastern Pennsylvania and a nearby domestic well were sampled for 9 months. Although both locations are connected to conduits (as evidenced by a tracer test), most of the year they were saturated with respect to calcite, which is more typical of matrix flow. Geochemical...
Series: GSA Special Papers
Published: 01 January 2006
DOI: 10.1130/2006.2410(08)
... A newly discovered dike complex and serpentinite-matrix mélange may represent basement for the Upper Jurassic Galice Formation in the Elk outlier of the western Klamath terrane, which lies far to the west of the Klamath Mountains province. The fault-bounded dike complex consists of virtually...
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Series: GSA Special Papers
Published: 01 January 2006
DOI: 10.1130/2006.2410(13)
... (heavy black line; location 92OMB213) that intrude chert, argillite, marble, metaserpentinite (metaserp), and greenstone (gnst) of the eastern Hayfork terrane. The marble, metaserpentinite, and greenstone are thought to be blocks in a chert-argillite mélange matrix (e.g., Wright, 1982 ). The Salmon...
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Series: GSA Special Papers
Published: 01 January 2006
DOI: 10.1130/2006.2410(21)
... of the relative contributions of footwall and hanging-wall rocks to the ultracataclasite. The ultracataclasite is composed of <10% single mineral grains ≤100 μm diameter in an ultra-fine-grained (<<1 μm) matrix. Single mineral grains are predominantly quartz, but also include calcite, pyrite...
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Series: GSA Special Papers
Published: 01 January 1995
DOI: 10.1130/SPE299-p393
Series: GSA Special Papers
Published: 01 January 1993
DOI: 10.1130/SPE279-p11
...-derived granule to boulder-size fragments in a foliated, phyllitic matrix. Granitic rocks and andesite/dacite dikes of the Cretaceous Peninsular Ranges arc and batholith intrude both autochthonous and allochthonous rocks. The olistoliths of Ordovician rock are resistant, moderately to well-sorted, blue...