Product catalogue
Convergent margin metallogenesis constrains onset of subduction on Earth
<div>Convergent margins are a hallmark feature of modern style plate tectonics. One expression of their operation is metallogenesis, which therefore may yield important insights into secular changes in styles of convergence and subduction. A global comparison of metallogenesis along convergent margins of over 20 well-endowed provinces indicates a consistent and systematic progression of mineral deposit types. We term this progression the convergent margin metallogenic cycle (CMMC). </div><div>
This CMMC mirrors convergent margin evolution. Each metallogenic cycle begins with the formation of porphyry copper deposits and/or volcanic-hosted massive sulphide deposits, associated with arc construction and back arc basin formation, respectively. When the convergent margin transitions into contraction/orogenesis due to processes such as accretion, flattening of subduction, or continent-continent collision, mineral deposits that form include orogenic gold and structurally hosted base metal deposits. Post-contractional extension is marked by the formation of intrusion related rare metal (tin, tungsten, molybdenum) and gold deposits, pegmatites, and alkaline porphyry copper deposits, closing the CMMC. </div><div>
Our analysis of the metallogenic record reveals that prior to ~3 Ga, metallogenesis is episodic and non-systematic, with CMMCs not recognised. From the mid- to late Mesoarchean onwards, CMMCs are observed in all provinces analysed, and display systematic trends through time: the Meso- to Neoarchean metallogenic provinces are characterized by a single metallogenic cycle, whereas in the Paleo- to Mesoproterozoic provinces, both single and multiple metallogenic cycles occur. From the middle Neoproterozoic onwards multiple metallogenic cycles are the rule. This evolution is accompanied by an increase in the duration of metallogenesis, ranging from ~100 to 180 million years in the Meso- to Neoarchean and 220 to more than 400 million years since the late Proterozoic. </div><div>
We interpret these trends to reflect secular changes in tectonic processes and Earth evolution. The emergence of CMMCs from ~3 Ga provides independent evidence for the operation of some early form of subduction since this time. The fact that CMMCs are recognized in all provinces of mid-Meso- to Neoarchean age suggests that subduction was the common <em>modus operandi</em> rather than an exception. The first appearance of multiple metallogenic cycles in the Paleoproterozoic may reflect the strengthening of cratonic margins by tectonothermal maturation since formation in the Archean. Long-lived metallogenesis and multiple metallogenic cycles in the Neoproterozoic and Phanerozoic are linked to deep-slab break-off, or modern, subduction in which the internal strength of the subducting slab allows maintenance of slab coherency. </div><div>
This Abstract was submitted/presented to the 2023 6th International Archean Symposium (6IAS) 25 - 27 July ( https://6ias.org/)
Simple
Identification info
- Date (Creation)
- 2023-02-19T20:00:00
- Date (Publication)
- 2023-09-11T00:56:36
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/147730
- Cited responsible party
-
Role Organisation / Individual Name Details Publisher Commonwealth of Australia (Geoscience Australia)
Voice Author Doublier, M.
Internal Contact Author Huston, D.
Internal Contact Author Eglington, B.
External Contact Author Pehrsson, S.
External Contact Author Mercier-Langevin, P.
External Contact Author Piercey, S.
External Contact
- Name
-
6th International Archean Symposium 25-27 July 2023 Fremantle Perth WA
- Purpose
-
Conference abstract for the 6th International Archean Symposium in Perth
- Status
- Completed
- Point of contact
-
Role Organisation / Individual Name Details Resource provider Minerals, Energy and Groundwater Division
External Contact Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Point of contact Doublier, M.
Internal Contact
- Spatial representation type
- Topic category
-
- Geoscientific information
Extent
))
- Maintenance and update frequency
- Not planned
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
-
-
Archean
-
- Keywords
-
-
Metallogenesis
-
- Keywords
-
-
secular
-
- theme.ANZRC Fields of Research.rdf
-
-
Resource geoscience
-
Structural geology and tectonics
-
- Keywords
-
-
Published_External
-
Resource constraints
- Title
-
Creative Commons Attribution 4.0 International Licence
- Alternate title
-
CC-BY
- Edition
-
4.0
- Addressee
-
Role Organisation / Individual Name Details User Any
- Use constraints
- License
- Use constraints
- Other restrictions
- Other constraints
-
© Commonwealth of Australia (Geoscience Australia) 2023
Resource constraints
- Title
-
Australian Government Security Classification System
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
- Classification system
-
Australian Government Security Classification System
- Language
- English
- Character encoding
- UTF8
Distribution Information
- Distributor contact
-
Role Organisation / Individual Name Details Distributor Commonwealth of Australia (Geoscience Australia)
Voice facsimile
- OnLine resource
-
Link to Conference Page
Link to Conference Page
- Distribution format
-
- OnLine resource
-
Link to Abstract Volume
Link to Abstract Volume
- Distribution format
-
Resource lineage
- Statement
-
<div>This is a conference abstract to accompany an oral presentation.</div>
Metadata constraints
- Title
-
Australian Government Security Classification System
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Metadata
- Metadata identifier
-
urn:uuid/d1b1091c-1f96-4d28-bcad-be8ad9f27028
- Title
-
GeoNetwork UUID
- Language
- English
- Character encoding
- UTF8
- Contact
-
Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Point of contact Doublier, M.
Internal Contact
Type of resource
- Resource scope
- Document
- Name
-
Conference Abstract
Alternative metadata reference
- Title
-
Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/147730
- Date info (Creation)
- 2023-09-11T00:20:56
- Date info (Revision)
- 2023-09-11T00:20:56
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
- http://pid.geoscience.gov.au/dataset/ga/122551