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Northern Australian 'Sedex' deposits: microbial oases in Proterozoic seas
Northern Australian Proterozoic stratiform sediment-hosted (‘Sedex’) Zn-Pb-Ag deposits form from hydrothermal solutions that interact with the sedimentary environment at, or near, the sea floor. Textures in chert, pyrite and base metal sulphides from several deposits indicate a variety of microbial features are commonplace. Pyrite is usually the most abundant sulphide in these deposits, and the very common fine grained laminated and crinkly variety is interpreted to replace original prone microbial mat and/or microbial detritus. Abundant pyrite formed in response to burial and decomposition of the remains of prolific hot springs microbial biota. Organic matter thus produced may be a key ingredient needed to form large sedimentary base metal sulphide deposits.
History
Publication title
Mineral Deposits: Processes to Processing, proceedings of the fifth biennial SGA Meeting and the tenth quadrennial IAGOD SymposiumEditors
C.J.Stanley et.al.Pagination
885-888ISBN
905809068XDepartment/School
School of Natural SciencesPublisher
A.A. BalkemaPlace of publication
RotterdamEvent title
Fifth biennial SGA Meeting and tenth quadrennial IAGOD SymposiumEvent Venue
LondonDate of Event (Start Date)
1999-08-22Date of Event (End Date)
1999-08-25Repository Status
- Restricted