Search results

• Sandstone provenance and characterization
  ...composition, in Folk and Dott Clasification, we have to know about quartz, feldspar, and rock fragments that compose the sandstone. When we figure it out, we c ...environment. Usually deposited shallow marine carbonate interlayered with feldspar and sandstones. In general have a maturity ranging from mature to supermatu
  10 KB (1,524 words) - 15:29, 14 March 2016
• Sandstone diagenetic processes
  * Feldspar grains dissolved * Kaolinite, chlorite, and illite precipitate as a result of feldspar dissolution
  7 KB (870 words) - 20:30, 5 April 2022
• Hydrology and sandstone diagenesis
  | Breakdown of K-feldspar or mica grains by fresh water ...ersion of smectite to illite, hydrolysis of micas, intense weathering of K-feldspar
  6 KB (787 words) - 13:43, 6 April 2022
• Botucatu Formation
  ...or pale yellow color, well sorted, texturally mature, may contain altered feldspar cemented by silica or iron oxide, which gives it the reddish color and also
  3 KB (432 words) - 17:54, 22 March 2019
• Influence of depositional environment on sandstone diagenesis
  ...y minerals form first because they precipitate more easily than quartz and feldspar overgrowths, which require more ordered crystal growth. Carbonate cement st
  8 KB (1,129 words) - 14:11, 6 April 2022
• Thin section analysis
  ...ns are available for [[calcite]], [[dolomite]], [[ferrous carbonate]], [[K-feldspar]], and [[plagioclase]]. Thin sections are then either covered or left uncov ...composed mostly of [[Brittleness|brittle]] grains such as [[quartz]] and [[feldspar]]. Therefore, the preservation of primary [[Reservoir quality|intergranular
  24 KB (3,264 words) - 15:09, 24 January 2022
• Sandstone sedimentology and stratigraphy
  ...'Feldspars''': commonly alkali feldspars and plagioclase feldspars. Alkali feldspar consists of complete solid solution consisting group of minerals in which t ...of amount of matrix into Arenites ([[quartz]] arenite, lithic arenite and feldspar arenite); which are texturally clean sandstones that are free of or have ve
  27 KB (3,802 words) - 19:32, 9 January 2024
• Log analysis: lithology
  ...address the more complex case of shaly sandstones with variable volumes of feldspar, mica, or carbonate material. This model can be solved using the graphical, ...r porosity and to estimate volumes of calcite, [[quartz]], dolomite, clay, feldspar, anhydrite, and salt. Once porosity is determined, saturation can be estima
  25 KB (3,189 words) - 17:24, 18 January 2022
• Subduction zone
  ...lithic fragments form one classification, and monocrystalline [[quartz]], feldspar, and unstable clasts plus polycrystalline quartz. The detail of this classi ...dissected arc. Dissected arc has higher proportion of quarzose grains and feldspar than undissected arc. Transitional arc lies between the two.
  27 KB (4,033 words) - 20:52, 27 March 2019
• Sandstone
  ...sandstone constain abundant of unstable minerals or rock fragments such as feldspar. Textural maturity determine by relative abundance of matrix and the degree
  10 KB (1,508 words) - 15:44, 22 March 2019
• SEM, XRD, CL, and XF methods
  ...rtz]] from [[chert]]) or polymineral grains (such as granite from separate feldspar and quartz).
  11 KB (1,477 words) - 15:25, 24 January 2022
• Data: sources
  ...e sandstones. Sandstones rich in potassium-rich minerals such as potassium feldspar, muscovite mica, illite, or glauconite can give a high gamma response that ...ium content generally indicates the presence of minerals such as potassium feldspar and mica. Thorium is associated with the mineral monazite, a common heavy m
  43 KB (6,686 words) - 13:44, 18 March 2019
• Reservoir
  ...h as olivine, pyroxene, amphibole, and biotite, or felsic minerals such as feldspar, muscovite, and [[quartz]].<ref> Noor, D., 2009, Pengantar Geologi, Univers
  14 KB (2,134 words) - 16:48, 26 March 2019
• Scanning electron microscopy (SEM)
  ...gion, blue = carbonate, green = clay minerals, yellow = [[quartz]], pink = feldspar, white = pyrite, and gray = organic matter.<ref name=Huangetal_2013 />
  16 KB (2,441 words) - 20:24, 23 January 2019
• Rock-water reaction
  ...contribute to permeability reduction can be composed of clay, [[quartz]], feldspar, or carbonate. Nonclay fines have no significant surface charge, and commer
  17 KB (2,356 words) - 19:24, 19 January 2022
• Reservoir quality
  | Feldspar || Syntaxial overgrowth, prismatic
  18 KB (2,514 words) - 17:47, 21 January 2022
• Rock-water reaction: formation damage
  ...contribute to permeability reduction can be composed of clay, [[quartz]], feldspar, or carbonate. Nonclay fines have no significant surface charge, and commer
  17 KB (2,380 words) - 18:23, 21 January 2022
• Mudstone nomenclature
  ...one is dominated by other components such as organic matter, phosphate, or feldspar, as detailed in the sections that follow<ref name=Lzrea2015a />. For feldspar content, by analogy with sandstone nomenclature, one can use the term “ar
  58 KB (8,391 words) - 19:46, 20 February 2024
• Quick-look lithology from logs
  * ''Radioactive minerals'' in sands, especially K-feldspar, zircon, and mica, can raise sand readings as high as adjacent shales. Gamm
  25 KB (3,637 words) - 19:39, 18 January 2022
• Wattenberg field
  ...proximately 80% quartz, 10% argillaceous matrix, 5% rock fragments, and 5% feldspar. Clay is the main matrix material, which is both detrital and diagenetic. T ..., and rounded and consist of 57%–80% quartz, 5%–10% rock fragments, and 5% feldspar. Porosity is intergranular with minor microporosity and intraparticle poros
  72 KB (10,249 words) - 20:06, 15 January 2024

View (previous 20 | next 20) (20 | 50 | 100 | 250 | 500)