Further development of a Precambrian
plate model and its application in
identifying sediment provenance

Bruce Eglington
U...
Overview
►
►

Data available to aid model development
Current status of model

 Improvements to plate boundary delineatio...
Overview
►
►

Data available to aid model development
Current status of model
 Improvements to plate boundary delineation...
Geochronology

~ 106,000 records in the DateView geochronology database
Dyke swarms

~ 6,500 records in the StratDB LIP database, many with geospatial
information in ArcMap compilation
Deposits

~ 15,000 deposit/mineralisation records in the StratDB database, most with latitude and
longitude information. ~...
Nd

T DM
Overview
►
►

Data available to aid model development
Current status of model

 Improvements to plate boundary delineatio...
Geophysical constraints
U-Pb Formation Ages
Nd TDM
Geographic extent of dated lithostratigraphic units
Interpreted maximum age of blocks
Overview
►
►

Data available to aid model development
Current status of model

 Improvements to plate boundary delineatio...
Constraints for Palaeogeographic
Reconstructions
►

Palaeomag constraints are primary – modelled using




GPlates
Pale...
Constraints for Palaeogeographic
Reconstructions
►

Palaeolongitude


Estimated based on the orthoversion concept present...
Palaeogeographic
Reconstructions
►

Extensive set of plates based on



►

Palaeomag constraints are primary – modelled ...
Overview
►
►

Data available to aid model development
Current status of model

 Improvements to plate boundary delineatio...
Available Palaeogeographic Models
►

Phanerozoic




►

►

Paleomap (Chris Scotese)
Earthbyte (GPlates)
Various commerc...
Some available Palaeogeographic
Reconstructions for Nuna (Columbia)

Rogers and Santosh, 2002

Zhao et al, 2002

Evans and...
►

Started with Palaeoproterozoic Nuna

►

Working forward in time through Mesoproterozoic to
Neoproterozoic Rodinia

►

A...
Overview
►
►

Data available to aid model development
Current status of model

 Improvements to plate boundary delineatio...
Overview
►
►

Data available to aid model development
Current status of model

 Improvements to plate boundary delineatio...
Overview
►
►

Data available to aid model development
Current status of model

 Improvements to plate boundary delineatio...
Reconstruction at 1500 Ma
Ages from 1500 – 1580 Ma
W. Africa

N. Australia

Siberia
Amazonia

W. Australia
Gawler

Slave

...
Basement control
of younger
sedimentation

From Paul Ramaekers (2011)
Basement control
of younger
sedimentation

From Paul Ramaekers (2011)
Basement control
of younger
sedimentation

From Paul Ramaekers (2011)
Basement control
of younger
sedimentation

From Tankard et al (2009)
Basement control
of younger
sedimentation

From Tankard et al (2009)
Basement control
of younger
sedimentation

From Tankard et al (2009)
Basement control
of younger
sedimentation

From Tankard et al (2009)
Overview
►
►

Data available to aid model development
Current status of model

 Improvements to plate boundary delineatio...
Probability
Unit Age (Ma)

Kaapvaal

1200

3600
1200

3800
Grain Age (Ma)
Pilbara
Zimbabwe

Kaapvaal

Neylan Fm

Lower Selika
Formation

1940 Ma
Detrital
provenance

From Tankard et al (2009)
Detrital zircon age spectra for Cape and Karoo sediments
Detrital zircon age spectra for Cape and Karoo sediments
Detrital zircon age spectra for Cape and Karoo sediments
U-Pb Formation Ages
U-Pb Formation Ages
Cape-Karoo potential provenance sources 850 – 960 Ma
Detrital
provenance
Acknowledgements
►
►

IGCP 509 project
University of Saskatchewan and NSERC


►

Geological Survey of Canada


►

The Ro...
Further Development of a Precambrian Plate Model by Bruce Eglington, U. of Saskatchewan: 2013/Third Annual PaleoGIS & Pale...
Further Development of a Precambrian Plate Model by Bruce Eglington, U. of Saskatchewan: 2013/Third Annual PaleoGIS & Pale...
Further Development of a Precambrian Plate Model by Bruce Eglington, U. of Saskatchewan: 2013/Third Annual PaleoGIS & Pale...
Further Development of a Precambrian Plate Model by Bruce Eglington, U. of Saskatchewan: 2013/Third Annual PaleoGIS & Pale...
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Further Development of a Precambrian Plate Model by Bruce Eglington, U. of Saskatchewan: 2013/Third Annual PaleoGIS & PaleoClimate Users Conference

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Further Development of a Precambrian Plate Model by Bruce Eglington, U. of Saskatchewan: 2013/Third Annual PaleoGIS & PaleoClimate Users Conference

  1. 1. Further development of a Precambrian plate model and its application in identifying sediment provenance Bruce Eglington University of Saskatchewan
  2. 2. Overview ► ► Data available to aid model development Current status of model  Improvements to plate boundary delineation  Meso- and Neo-Proterozoic and early Palaeoproterozoic/Neoarchaean  Better visualising different types of mineralisation  Demo model ► ► Definition of Precambrian plates and relevance to Phanerozoic geology Additional constraints provided by detrital zircon provenance assessments
  3. 3. Overview ► ► Data available to aid model development Current status of model  Improvements to plate boundary delineation  Meso- and Neo-Proterozoic and early Palaeoproterozoic/Neoarchaean  Better visualising different types of mineralisation  Demo model ► ► Definition of Precambrian plates and relevance to Phanerozoic geology Additional constraints provided by detrital zircon provenance assessments
  4. 4. Geochronology ~ 106,000 records in the DateView geochronology database
  5. 5. Dyke swarms ~ 6,500 records in the StratDB LIP database, many with geospatial information in ArcMap compilation
  6. 6. Deposits ~ 15,000 deposit/mineralisation records in the StratDB database, most with latitude and longitude information. ~4,500 have Pb isotope data
  7. 7. Nd T DM
  8. 8. Overview ► ► Data available to aid model development Current status of model  Improvements to plate boundary delineation  Meso- and Neo-Proterozoic and early Palaeoproterozoic/Neoarchaean  Better visualising different types of mineralisation  Demo model ► ► Definition of Precambrian plates and relevance to Phanerozoic geology Additional constraints provided by detrital zircon provenance assessments
  9. 9. Geophysical constraints
  10. 10. U-Pb Formation Ages
  11. 11. Nd TDM
  12. 12. Geographic extent of dated lithostratigraphic units
  13. 13. Interpreted maximum age of blocks
  14. 14. Overview ► ► Data available to aid model development Current status of model  Improvements to plate boundary delineation  Plate motion constraints  Meso- and Neo-Proterozoic and early Palaeoproterozoic/Neoarchaean  Better visualising different types of mineralisation  Demo model ► ► Definition of Precambrian plates and relevance to Phanerozoic geology Additional constraints provided by detrital zircon provenance assessments
  15. 15. Constraints for Palaeogeographic Reconstructions ► Palaeomag constraints are primary – modelled using    GPlates Paleogis plugin for ArcMap Customised software written by BE
  16. 16. Constraints for Palaeogeographic Reconstructions ► Palaeolongitude  Estimated based on the orthoversion concept presented by Mitchell and Evans (2012) Most likely centroid of supercontinent
  17. 17. Palaeogeographic Reconstructions ► Extensive set of plates based on   ► Palaeomag constraints are primary – modelled using    ► Geology Aeromagnetic and Gravity Anomalies GPlates Paleogis plugin for ArcMap Customised software written by BE Consider structural vergence directions
  18. 18. Overview ► ► Data available to aid model development Current status of model  Improvements to plate boundary delineation  Plate motion constraints  Meso- and Neo-Proterozoic and early Palaeoproterozoic/Neoarchaean  Better visualising different types of mineralisation  Demo model ► ► Definition of Precambrian plates and relevance to Phanerozoic geology Additional constraints provided by detrital zircon provenance assessments
  19. 19. Available Palaeogeographic Models ► Phanerozoic    ► ► Paleomap (Chris Scotese) Earthbyte (GPlates) Various commercial models Meso- to Neo-Proterozoic   IGCP 440 (Li et al., 2008) Various other ‘snap-shots’ Palaeoproterozoic to Archaean Various, mostly schematic, ‘snapshots’  Eglington et al. (2013)  Pisarevsky et al. (2013)  Pehrsson et al. (2013)  Paleomap IGCP 440
  20. 20. Some available Palaeogeographic Reconstructions for Nuna (Columbia) Rogers and Santosh, 2002 Zhao et al, 2002 Evans and Mitchell, 2011
  21. 21. ► Started with Palaeoproterozoic Nuna ► Working forward in time through Mesoproterozoic to Neoproterozoic Rodinia ► Also extending back towards Neoarchaean
  22. 22. Overview ► ► Data available to aid model development Current status of model  Improvements to plate boundary delineation  Plate motion constraints  Meso- and Neo-Proterozoic and early Palaeoproterozoic/Neoarchaean  Better visualising different types of mineralisation  Demo model ► ► Definition of Precambrian plates and relevance to Phanerozoic geology Additional constraints provided by detrital zircon provenance assessments
  23. 23. Overview ► ► Data available to aid model development Current status of model  Improvements to plate boundary delineation  Plate motion constraints  Meso- and Neo-Proterozoic and early Palaeoproterozoic/Neoarchaean  Better visualising different types of mineralisation  Demo model ► ► Definition of Precambrian plates and relevance to Phanerozoic geology Additional constraints provided by detrital zircon provenance assessments
  24. 24. Overview ► ► Data available to aid model development Current status of model  Improvements to plate boundary delineation  Plate motion constraints  Meso- and Neo-Proterozoic and early Palaeoproterozoic/Neoarchaean  Better visualising different types of mineralisation  Demo model ► ► Definition of Precambrian plates and relevance to Phanerozoic geology Additional constraints provided by detrital zircon provenance assessments
  25. 25. Reconstruction at 1500 Ma Ages from 1500 – 1580 Ma W. Africa N. Australia Siberia Amazonia W. Australia Gawler Slave Baltica Mawson W. Gneiss Complex Superior Plutonic / volcanic crystallization Metamorphic Cooling Ni-Cu-PGE VMS U
  26. 26. Basement control of younger sedimentation From Paul Ramaekers (2011)
  27. 27. Basement control of younger sedimentation From Paul Ramaekers (2011)
  28. 28. Basement control of younger sedimentation From Paul Ramaekers (2011)
  29. 29. Basement control of younger sedimentation From Tankard et al (2009)
  30. 30. Basement control of younger sedimentation From Tankard et al (2009)
  31. 31. Basement control of younger sedimentation From Tankard et al (2009)
  32. 32. Basement control of younger sedimentation From Tankard et al (2009)
  33. 33. Overview ► ► Data available to aid model development Current status of model  Improvements to plate boundary delineation  Plate motion constraints  Meso- and Neo-Proterozoic and early Palaeoproterozoic/Neoarchaean  Better visualising different types of mineralisation  Demo model ► ► Definition of Precambrian plates and relevance to Phanerozoic geology Additional constraints provided by detrital zircon provenance assessments
  34. 34. Probability
  35. 35. Unit Age (Ma) Kaapvaal 1200 3600 1200 3800 Grain Age (Ma)
  36. 36. Pilbara Zimbabwe Kaapvaal Neylan Fm Lower Selika Formation 1940 Ma
  37. 37. Detrital provenance From Tankard et al (2009)
  38. 38. Detrital zircon age spectra for Cape and Karoo sediments
  39. 39. Detrital zircon age spectra for Cape and Karoo sediments
  40. 40. Detrital zircon age spectra for Cape and Karoo sediments
  41. 41. U-Pb Formation Ages
  42. 42. U-Pb Formation Ages
  43. 43. Cape-Karoo potential provenance sources 850 – 960 Ma
  44. 44. Detrital provenance
  45. 45. Acknowledgements ► ► IGCP 509 project University of Saskatchewan and NSERC  ► Geological Survey of Canada  ► The Rothwell Group Chris Scotese GPlates software  ► Newmont Areva De Beers Paleogis plugin for ArcMap   ► Ore deposit information (especially via Lesley Chorlton) + various coworkers Various mining companies for student support and money to purchase hardware and software    ► Databases housed at U of S Dietmar Mueller and John Cannon in Sydney, Australia Various software companies for providing academic versions     Embarcadero Steema AtoZed HK Systems

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