1 Ocak 2019 Dergi makalesi Açık Erişim

Bozkaya, Omer; Bozkaya, Gulcan; Yilmaz, Huseyin; Hozatlioglu, Deniz; Banks, David A.

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  <identifier identifierType="URL">https://aperta.ulakbim.gov.tr/record/70965</identifier>
  <creators>
    <creator>
      <creatorName>Bozkaya, Omer</creatorName>
      <givenName>Omer</givenName>
      <familyName>Bozkaya</familyName>
      <affiliation>Pamukkale Univ, Dept Geol Engn, TR-20070 Denizli, Turkey</affiliation>
    </creator>
    <creator>
      <creatorName>Bozkaya, Gulcan</creatorName>
      <givenName>Gulcan</givenName>
      <familyName>Bozkaya</familyName>
      <affiliation>Pamukkale Univ, Dept Geol Engn, TR-20070 Denizli, Turkey</affiliation>
    </creator>
    <creator>
      <creatorName>Yilmaz, Huseyin</creatorName>
      <givenName>Huseyin</givenName>
      <familyName>Yilmaz</familyName>
      <affiliation>Cumhuriyet Univ, Dept Geophys Engn, TR-58140 Sivas, Turkey</affiliation>
    </creator>
    <creator>
      <creatorName>Hozatlioglu, Deniz</creatorName>
      <givenName>Deniz</givenName>
      <familyName>Hozatlioglu</familyName>
      <affiliation>Cumhuriyet Univ, Dept Geol Engn, TR-58140 Sivas, Turkey</affiliation>
    </creator>
    <creator>
      <creatorName>Banks, David A.</creatorName>
      <givenName>David A.</givenName>
      <familyName>Banks</familyName>
      <affiliation>Univ Leeds, Sch Earth &amp; Environm, Leeds LS2 9JT, W Yorkshire, England</affiliation>
    </creator>
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  <titles>
    <title>The Origin, Age And Duration Of Hydrothermal Alteration Associated With Iron Skarn Mineralization Determined From Clay/Phyllosilicate Minerals, Bizmisen-Erzincan, East-Central Turkey</title>
  </titles>
  <publisher>Aperta</publisher>
  <publicationYear>2019</publicationYear>
  <dates>
    <date dateType="Issued">2019-01-01</date>
  </dates>
  <resourceType resourceTypeGeneral="Text">Journal article</resourceType>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://aperta.ulakbim.gov.tr/record/70965</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.1016/j.oregeorev.2019.103179</relatedIdentifier>
  </relatedIdentifiers>
  <rightsList>
    <rights rightsURI="http://www.opendefinition.org/licenses/cc-by">Creative Commons Attribution</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
  </rightsList>
  <descriptions>
    <description descriptionType="Abstract">The Bizmilen skarn-type iron deposit is one of the major operating mines in east-central Turkey. Middle Eocene (46.3-42.0 Ma) plutonic rocks (quartz diorite) were intruded into Triassic-Cretaceous limestones and Upper Cretaceous ophiolites forming skarns (garnet, diopside, epidote, scapolite and tremolite), iron mineralization and clay-bearing alteration zones (argillic alteration). Clay-rich rocks of the argillic zone, contain mainly quartz, calcite, dolomite, feldspar and clay/phyllosilicate minerals comprising dioctahedral smectite, kaolinite, mixedlayered illite-smectite (I-S) and illite, and trioctahedral vermiculite, serpentine/chrysotile, talc, chlorite and mixed-layered chlorite-smectite (C-S). Na-Ca smectite, I-S, illite and kaolinite are developed at both the quartz diorite-limestone contact and within the quartz diorite body. However, phlogopite, vermiculite, serpentine/chrysotile, talc and chlorite occur at the quartz diorite-ophiolite contacts, indicating the distributions of clay/phyllosilicate minerals are influenced primarily by the host-rock composition. Chlorite geothermometry data suggest similar to 300 degrees C for the retrograde stage of skarn formation and similar to 120 degrees C for the late argillic alteration overprint, and the formation of low-temperature clays (smectite, vermiculite, C-S) in areas of skarn formation. Kaolinite 1 M (one-layer monoclinic) and I-S (I-75-S-25, R1 ordering) are indicative of low-temperature ( &amp;lt; 200 degrees C) argillic alteration conditions. Optical and electron microscopy studies of kaolinite, smectite and I-S indicate a completely hydrothermal (neo-formation) origin, with the absence of any detrital input. The major and trace/REE wholerock analyses of clays show they have a composition between the analyses of quartz diorite and ophiolite rocks (i.e., serpentinite and serpentinized peridotite). However, the analyses are closest to those of the quartz diorite. The calculated delta O-18 and delta D values of fluids in equilibrium with the clays (using the average values of the fluid inclusion homogenization temperatures) indicate a pre-dominantly magmatic water source. Assuming the clayforming fluids originated from magmatic water, the delta 18O(V-SMOW) and delta DV-SMOW compositions indicate &amp;lt; 200 degrees C for smectite during the supergene or low-temperature argillic stage, but in excess of 200 degrees C for I-S and kaolinite during the hypogene or high-temperature argillic stage. Ar-40/Ar-39 age data of illite and I-S (37.5-25.5 Ma) indicate alteration started during the late Eocene, similar to 4 Ma after intrusion of the pluton at 42 Ma, and continued to the late Oligocene, with a duration of similar to 12 Ma. The age data imply a long period of cooling at depth, without exhumation, during epithermal alteration after the retrograde skarn stage. The data show that hydrothermal clays formed from magmatic fluids in a hydrothermal system that persisted well after the intrusion of the igneous body and are indicative of how long hydrothermal systems can persist in areas of mineralization.</description>
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