rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Mineralogical characteristics and weathering environments in Texas lignite overburdens
  name:
    name part: Abder-Ruhman, Mohammed.
    role:
      role term: creator
  name:
    name part: Dixon, J. B.
    role:
      role term: degree supervisor.
  name:
    name part: Hossner, L. R.
    role:
      role term: degree committee member.
  name:
    name part: Tieh, T. T.
    role:
      role term: degree committee member.
  name:
    name part: Wilding, L. P.
    role:
      role term: degree committee member.
  name:
    name part: Texas A & M University
    role:
      role term: degree granting institution.
  type of resource: text
  genre: bibliography
  genre: Academic theses
  origin info:
    place:
      place term: xx
    date issued: 1985
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: xv, 294 leaves : illustrations ; 29 cm
  abstract: Seven cores and five soils were investigated to characterize the mineralogy of their coarse fractions (>2 μm). The cores and associated soils were sampled from the Wilcox Group sediments overlying lignite at several geographical locations. Heavy-light mineral separation, XRD, IR, SEM, thin section examination, and total chemical analysis were used. Coarse fractions were dominated by quartz and contained variable amounts of weatherable minerals, including mica, K -feldspars, Na-Ca feldspars, chlorite, and kaolinite. Mineral abundance of mica, chlorite, and kaolinte increased with the decrease in particle size from sand to fine silt. Potassium feldspars and Na-Ca feldspars were more abundant in the coarse and medium silt fraction than either the sand, and in most cases, the fine silt. Iron-bearing minerals identified in the coarse fractions included goethite and hematite in the oxidized zones and siderite, chlorite, and pyrite in the reduced zones. Mineral distribution and abundance was related to lithology, soil pedogenic processes, and the status of oxidation of the sediment. Potassium feldspars and particularly, plagioclase feldspars were the lowest in the soil solum, suggesting alteration by the processes of soil formation. Sediment oxidation had caused a moderate reduction in the amounts of weatherable minerals. The magnitude of this reduction was related to the texture of the sediment. Oxidation and associated processes had caused relatively higher mineral weathering in the coarse-textured sediments than the fine-textured ones. The abundance of iron-bearing minerals was mainly related to the status of sediment oxidation. The abundance of weatherable minerals within the Wilcox Group sediments were related to lithology. The Carrizo Formation was composed mainly of quartz, whereas the Simsboro and the Calvert Bluff Formations contained substantial amounts of weatherable minerals in addition to quartz. The structural states of K -feldspars of the Wilcox Group sedime…
  note: "Major subject: Soil Science."
  note: Typescript (photocopy).
  note: Vita.
  note: Ph. D. Texas A & M University 1985
  note: Includes bibliographical references (leaves 178-187).
  subject:
    geographic code: n-us-tx
  subject:
    topic: Soil mineralogy
    geographic: Texas
  subject:
    topic: Strip mining
    geographic: Texas
  subject:
    topic: Major soil science
  subject:
    topic: Soil mineralogy
  subject:
    topic: Strip mining
  subject:
    geographic: Texas
  identifier: http://proxy.library.tamu.edu/login
  identifier: https://hdl.handle.net/1969.1/DISSERTATIONS-439238
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: https://hdl.handle.net/1969.1/DISSERTATIONS-439238
  record info:
    record content source: TXA
    record creation date: 870115
    record change date: 20220103135026.0
    record identifier: in00000415287
    language of cataloging:
      language term: eng