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: Early diagenesis of clastic sediments
    sub title: eastern Gulf of Mexico
  name:
    name part: Conner, Steven Pursel
    name part: 1959-
    role:
      role term: creator
  name:
    name part: Bryant, William R.
    role:
      role term: degree supervisor.
  name:
    name part: Tieh, Thomas T.
    role:
      role term: degree supervisor.
  name:
    name part: Berg, Robert R.
    role:
      role term: degree committee member.
  name:
    name part: Dixon, Joe B.
    role:
      role term: degree committee member.
  name:
    name part: Dorobek, Steven L.
    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: 1989
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: xiii, 196 leaves : illustrations ; 29 cm
  abstract: Cored Miocene, Pleistocene, and Holocene Gulf of Mexico sediments (ranging in depth from 0 to 3,700 meters below sea floor) consist of interbedded sands, silts, and muds with varying degrees of consolidation. Samples selected from these sediments were studied for their mineralogy and diagenesis. Rapid deposition, lack of tectonism, and modest temperature increase (maximum temperature: 91°C), has resulted in limited diagenesis. The Miocene sediments represent various sub-environments of the ancestral Mississippi River delta complex; Pleistocene and Holocene sediments are continental shelf, slope, and Mississippi Fan deposits. Sands are fine- to very fine-grained feldspathic litharenites with abundant (average 18%) matrix fines and minor (average 4.4%) carbonate clasts and shell fragments. The authigenic phases are dominated by carbonates, including calcite, dolomite, and siderite. Carbonate diagenesis is a continuing process, forming (1) disseminated authigenic micron-sized (<30 μm) siderite or ferroan carbonate grains in muddy, organic-rich marine sediments or (2) scattered thin (<15 cm), poikilotopic, calcite- or dolomite-cemented bands in thicker, unconsolidated marine sands. The cemented bands grew during burial through dissolution of detrital carbonate and reprecipitation at the margins of cemented zones. These bands may represent a substrate for extensive cementation during later diagenesis. The mineralogy, chemistry, and texture of carbonate are controlled in part by organic matter diagenesis; the majority of authigenic carbonate formed under sulfidic or methanic conditions. Pore fluids in mudstones were expelled into adjacent sand due to compaction dewatering. Due in part to this fluid flow, different authigenic assemblages were developed in muds and sands. Minor authigenic phases include pyrite, clay minerals, feldspar, and a tentatively identified zeolite, possibly clinoptilolite. Pyrite occurs during sulfidic diagenesis in organic-rich, muddy sediments, ty…
  note: Typescript (photocopy).
  note: Vita.
  note: "Major subject: Geology."
  note: Ph. D. Texas A & M University 1989
  note: Includes bibliographical references.
  subject:
    geographic code: nm-----
  subject:
    topic: Sedimentation analysis
  subject:
    topic: Diagenesis
    geographic: Mexico, Gulf of
  subject:
    topic: Sedimentary structures
    geographic: Mexico, Gulf of
  subject:
    topic: Diagenesis
  subject:
    topic: Sedimentary structures
  subject:
    geographic: Gulf of Mexico
  subject:
    topic: Major geology
  identifier: http://gateway.proquest.com/openurl
  identifier: http://proxy.library.tamu.edu/login
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    location:
      url: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: http://gateway.proquest.com/openurl
  record info:
    record content source: TXA
    record creation date: 900730
    record change date: 20200904152435.0
    record identifier: in00000920962
    language of cataloging:
      language term: eng