GEOSCAN Search Results: Fastlink


TitleClay mineralogical study of indurated seafloor sediment samples from the Lihir area, Papua New Guinea
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorObina, B; Percival, J BORCID logo; Hunt, P A
SourceGeological Survey of Canada, Current Research (Online) no. 2001-D21, 2001, 22 pages, Open Access logo Open Access
PublisherNatural Resources Canada
Mediapaper; on-line; digital; CD-ROM
RelatedThis publication is contained in Current Research 2001, winter release
File formatpdf
AreaLihir Island; Papua New Guinea
Lat/Long WENS146.0000 154.0000 -1.0000 -7.0000
Subjectsmineralogy; sedimentology; clay analyses; clay mineralogy; marine clays; sea sediment geochemistry; seamounts; submarine hydrothermal vents; hydrothermal systems; smectite; calcite; hydrothermal alteration; petrographic analyses; x-ray diffraction analyses; scanning electron microscope analyses; electron probe analyses; Conical Seamount; Edison Seamount; Tubaf Seamount
Illustrationssketch maps; bathymetric profiles; images; photomicrographs; tables
Released2001 01 01
AbstractDetailed studies of samples collected from two seafloor cruises to the Lihir area in Papua New Guinea continue. In 1994, a detailed study of the Tabar-Lihir-Tanga-Feni island chain in the New Ireland fore-arc basin was con- ducted aboard the R/V Sonne (cruise SO-94). The discovery of four new seamounts led to further investigations in 1998 (cruise SO-133). Edison Seamount was determined to be hydrothermally active and marked a new type of setting on the seafloor for shallow-marine hot springs. Conical Seamount, a dormant cone, is characterized by dis- tinctive epithermal-style gold mineralization. Two unusual indurated sediment samples from Conical Seamount were the focus of this study. They are com- posed of amorphous silica/glass and/or iron oxide layers (crusts), iron-bearing smectite and calcite. These miner- als occur in a low-temperature hydrothermal environment, indicating that these samples are the end product of submarine hydrothermal alteration and sea-water/rock interactions.

Date modified: