Organic matter in ancient ores and sediments

Organic material incorporated in an ore or a sediment may represent the resistant parts of organisms, organic compounds adsorbed on inorganic minerals, organic precipitates from chemical reactions in basin waters, or detrital grains eroded from older carbonaceous rocks. In addition, hydrocarbons may be generated elsewhere in a basin before migrating into and being retained in the rocks under consideration. During diagenesis and metamorphism under non-oxidising conditions, the chemical composition of organic matter from all sources progressively changes as volatile compounds (including carbon dioxide, water, and hydrocarbons) are evolved. All types of carbonaceous source material give graphite as the final solid product, but in various amounts, depending on their initial composition and subsequent history. Bacterial or aerial oxidation of solid organic materials is most rapid at low ranks and initially causes an increase in oxygen/carbon ratios before complete removal of carbonaceous matter is achieved. At high temperatures, oxidation by water can completely convert graphite to carbon dioxide. Data are given on the insoluble organic matter isolated by demineralisation of samples from the Red Sea, Julia Creek, McArthur River, Mount Isa, Broken Hill, Cobar, Woodlawn, Kambalda, Rum Jungle, Alligator River (Australia) and the Witwatersrand (South Africa). Most of these samples contain material, probably of algal origin, that is now at the graphitic stage of metamorphism. Organic matter from recent sediments in the Red Sea and ore-related rocks from McArthur River, Mount Isa, and Broken Hill show a progressive change in rank consistent with a syngenetic theory of ore formation. The presence (or even the absence) of carbonaceous material in an ore or sediment is a valuable parameter in reconstructing the chemical and biological environment of genesis and subsequent geological changes.

Simple

Identification info

Date (Publication)
1981-01-01T00:00:00
Citation identifier
Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/81088

Cited responsible party
Role Organisation / Individual Name Details
Publisher

Bureau of Mineral Resources, Geology and Geophysics

 Canberra
Author

Saxby, J.D.

 1
Name

BMR Journal of Australian Geology and Geophysics

Issue identification

6:4:287-291

Point of contact
Role Organisation / Individual Name Details
Custodian

Corp
Owner

Commonwealth of Australia (Geoscience Australia)
Custodian

Commonwealth of Australia (Geoscience Australia)

 Voice
Topic category
  • Geoscientific information
Maintenance and update frequency
Unknown

Resource format

Title

Product data repository: Various Formats

Website

Data Store directory containing the digital product files

Data Store directory containing one or more files, possibly in a variety of formats, accessible to Geoscience Australia staff only for internal purposes

Keywords

  • GA Publication

  • Journal

Australian and New Zealand Standard Research Classification (ANZSRC)

  • Earth Sciences

Keywords

  • Published_External

Resource constraints

Title

Creative Commons Attribution 4.0 International Licence

Alternate title

CC-BY

Edition

4.0

Website

http://creativecommons.org/licenses/

Access constraints
License
Use constraints
License

Resource constraints

Title

Australian Government Security ClassificationSystem

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified
Language
English
Character encoding
UTF8

Distribution Information

Distributor contact
Role Organisation / Individual Name Details
Distributor

Commonwealth of Australia (Geoscience Australia)

 Voice
OnLine resource

Journal article (pdf)

Journal article (pdf)

Distribution format

  • pdf

Resource lineage

Statement

Unknown

Hierarchy level
Non geographic dataset
Other

GA Publication

Description

Source data not available.

Metadata constraints

Title

Australian Government Security ClassificationSystem

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified

Metadata

Metadata identifier
urn:uuid/fae9173a-701d-71e4-e044-00144fdd4fa6

Title

GeoNetwork UUID

Language
English
Character encoding
UTF8
Contact
Role Organisation / Individual Name Details
Point of contact

Commonwealth of Australia (Geoscience Australia)

 Voice

Type of resource

Resource scope
Document
Name

AGSO BMR Journal

Alternative metadata reference

Title

Geoscience Australia - short identifier for metadata record with

uuid

Citation identifier
eCatId/81088

Metadata linkage

https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/fae9173a-701d-71e4-e044-00144fdd4fa6

Date info (Revision)
2018-04-20T06:10:07
Date info (Creation)
2014-06-03T00:00:00

Metadata standard

Title

AU/NZS ISO 19115-1:2014

Metadata standard

Title

ISO 19115-1:2014

Metadata standard

Title

ISO 19115-3

Title

Geoscience Australia Community Metadata Profile of ISO 19115-1:2014

Edition

Version 2.0, September 2018

Citation identifier
https://pid.geoscience.gov.au/dataset/ga/122551

 
 

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