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Northern Australian 'Sedex' deposits: microbial oases in Proterozoic seas

Citation

McGoldrick, PJ, Northern Australian 'Sedex' deposits: microbial oases in Proterozoic seas, Mineral Deposits: Processes to Processing, proceedings of the fifth biennial SGA Meeting and the tenth quadrennial IAGOD Symposium, 22-25 August 1999, London, pp. 885-888. ISBN 905809068X (1999) [Conference Extract]


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Abstract

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.

Item Details

Item Type:Conference Extract
Research Division:Earth Sciences
Research Group:Geology
Research Field:Sedimentology
Objective Division:Mineral Resources (excl. Energy Resources)
Objective Group:Mineral Exploration
Objective Field:Zinc Ore Exploration
Author:McGoldrick, PJ (Dr Peter McGoldrick)
ID Code:70718
Year Published:1999
Deposited By:Earth Sciences
Deposited On:2011-07-01
Last Modified:2012-07-19
Downloads:4 View Download Statistics

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