Titanium mobilization by hydrocarbon fluids related to sill intrusion in a sedimentary sequence, Scotland

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Abstract

An occurrence of vein-hosted bitumen in Carboniferous rocks, central Scotland, exhibits unusual enrichments in titanium, zirconium and chromium, detected by electron microprobe. These elements occur as mineral inclusions of titanium and titanium-iron oxides. A close association between titanium-rich tuffs and a quartz dolerite sill suggests that metals were leached from igneous rocks by a hydrocarbon-rich fluid generated by the heat of the intrusion into organic-rich shales. This occurrence supports other evidence for widespread titanium mobility under low-temperature conditions. Inclusions of nickel arsenide may reflect regionally important mineralization, including former ore deposits, related to sills and dykes. As sills are extensively intruded into petroleum-prospective basins offshore, they may have a significant influence upon sediment geochemistry. (C) 2003 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)155-167
Number of pages12
JournalOre Geology Reviews
Volume24
Issue number1-2
DOIs
Publication statusPublished - 2004

Keywords

  • titanium
  • Scotland
  • hydrocarbon fluids
  • NORTH-SEA
  • SANDSTONES
  • MINERALS
  • OXIDES
  • CALIFORNIA
  • INCLUSIONS
  • BITUMENS
  • DEPOSITS
  • HISTORY
  • ROCKS

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