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| Titel: |
Correlation of the Archaean Mallina - Whim Creek Basin: implications for base-metal potential of the central part of the Pilbara granite-greenstone terrane |
| Auteur: |
Huston, D. L. Smithies, R. H. Sun, S-S. |
| Verschenen in: |
Australian journal of earth sciences |
| Paginering: | Jaargang 47 (2000) nr. 2 pagina's 217-230 |
| Jaar: |
2000-04 |
| Inhoud: |
The ca 3000 Ma Whim Creek Belt forms part of the central granite-greenstone terrane of the Archaean Pilbara Craton, northwestern Western Australia, and hosts significant Cu-Zn ± Pb deposits. Lithostratigraphic studies and geochronological results suggest that the volcano-sedimentary rocks of this belt either correlate directly with, or immediately underlie, the sedimentary rocks of the adjacent and regionally extensive Mallina Basin (i.e. a Mallina - Whim Creek Basin). Consequently, the Mallina Basin should also be considered highly prospective for Cu-Zn ± Pb deposits. In the Mallina Basin, numerous minor base-metal deposits have similarities to deposits of the Whim Creek Belt, which strongly supports this view. Lead-isotope data tentatively suggest that mineralisation in the Whim Creek Belt relates to two separate events that can be correlated with felsic magmatism throughout the Mallina - Whim Creek Basin. It is not yet possible to place unequivocal constraints on the genesis of the base-metal deposits of the Mallina - Whim Creek Basin as these mineral deposits have features that are consistent with both a Cobar-type syntectonic model or a volcanic-hosted massive sulfide model. Comparisons of deposits throughout the Mallina - Whim Creek Basin reveal a number of empirical characteristics that may be useful in developing exploration models, including: (i) a close spatial association with high-Mg basalts; (ii) an association with coarse clastic rocks of the Cistern Formation and Constantine Sandstone; and (iii) an association with anticlinal closures and/or growth and tectonic faults. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 3 van 12 gevonden artikelen
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