Mineralogy and physical properties of cored sediments from the gas hydrate potential area of offshore southwestern Taiwan

Wei Teh Jiang, Ju Chin Chen, Bo Jiun Huang, Chun Jung Chen, Yung Tan Lee, Pin Ru Huang, Chieh Chia Lung, Shao Wei Huang

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Cored sediments from the gas hydrate prospect area offshore southwestern Taiwan exhibit porosities, water contents, and bulk densities comparable to sediments in other gas-hydrate potential areas. Short-distance transport and rapid deposition of the sediments are implied by their poor sorting and detrital and clay mineralogy. These features and the organic-rich nature of the sediments present an environment suitable for formation of gas hydrates. High methane concentrations of porewaters and gas-escape structures of the sediments further imply possible occurrence of gas hydrates in the region. Prominent overgrowth microstructures on authigenic pyrite framboids at shallow depths are consistent with sulfate reduction and pyrite precipitation related to migration and oxidation of methane possibly released from gas hydrate zones at later stages of early diagenesis.

Original languageEnglish
Pages (from-to)981-1007
Number of pages27
JournalTerrestrial, Atmospheric and Oceanic Sciences
Volume17
Issue number4
DOIs
Publication statusPublished - 2006 Dec

All Science Journal Classification (ASJC) codes

  • Oceanography
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)

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