Pre-1.8 Ga tectono-magmatic evolution of the Kalkadoon–Leichhardt Belt: implications for the crustal architecture and metallogeny of the Mount Isa Inlier, northwest Queensland, Australia

Bierlein, Frank P; Maas, Roland; Woodhead, Jon

doi:10.1080/08120099.2011.571286

Cited by 19 publications

(8 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…6a, b), which show a prominent truncation of NW-trending structural grain of the proto-North Australian Craton against the north-south structural grain of the Mount Isa Terrane. The structural grain of the Ardmore-May Downs Domain aligns with the regional structural and geophysical grains of the Davenport Province and Tennant Creek Block Wyborn & Page 1983;Bierlein et al 2008Bierlein et al , 2011. This boundary between the Ardmore-May Downs Domain and the Leichhardt River Domain (Fig.…”

Section: Western Mount Isasupporting

confidence: 54%

“…Sm-Nd isotope model ages of igneous and sedimentary rocks from the Ardmore-May Downs Domain are indistinguishable from the pre-1800 Ma magmatic rocks of the Kalkadoon Batholith, which are characterized by depleted mantle model ages (T DM ) ranging from 2380 to 2820 Ma (Bierlein & Betts 2004;Bierlein et al 2011). These rocks have stronger within-plate affinities (Bierlein et al 2011) and are quite distinct from the rocks to the east of the Kalkadoon Batholith.…”

Section: Western Mount Isamentioning

confidence: 91%

“…These rocks have stronger within-plate affinities (Bierlein et al 2011) and are quite distinct from the rocks to the east of the Kalkadoon Batholith. This data was used to reject the notion that the Mount Isa Fault Zone represented a suture (Bierlein & Betts 2004).…”

Section: Western Mount Isamentioning

confidence: 95%

See 2 more Smart Citations

Australia and Nuna

Betts

Armit

Stewart

et al. 2015

View full text Add to dashboard Cite

show abstract

Section: Western Mount Isasupporting

confidence: 54%

Section: Western Mount Isamentioning

confidence: 91%

See 1 more Smart Citation

Australia and Nuna

Betts

Armit

Stewart

et al. 2015

View full text Add to dashboard Cite

show abstract

“…1850 Ma continental crust (Bickford and Hill, 2007;Bickford et al, 2015). No less importantly, many of these same magmatic rocks have inherited an abundance of older zircons, either as individual xenocrysts or cores to younger magmatic grains, that yield 1862-1814 Ma ages (Bickford et al, 2015) in the same range as 1870-1840 Ma basement granites and felsic gneisses in Paleoproterozoic eastern Australia (Bierlein et al, 2008(Bierlein et al, , 2011. Such striking similarities are unlikely to be coincidental, instead reaffirming suggestions made here and elsewhere that the provinces of southern Laurentia originated in Australia and were built on a common older basement dating back to the early Paleoproterozoic or even earlier as would already seem clear from comparisons of the Sm-Nd DM ages (Fig.…”

Section: Short Researchmentioning

confidence: 99%

Antipodean fugitive terranes in southern Laurentia: How Proterozoic Australia built the American West

Gibson

Champion

2019

Lithosphere

View full text Add to dashboard Cite

Paleoproterozoic arc and backarc assemblages accreted to the south Laurentian margin between 1800 Ma and 1600 Ma, and previously thought to be indigenous to North America, more likely represent fragments of a dismembered marginal sea developed outboard of the formerly opposing Australian-Antarctic plate. Fugitive elements of this arc-backarc system in North America share a common geological record with their left-behind Australia-Antarctic counterparts, including discrete peaks in tectonic and/or magmatic activity at 1780 Ma, 1760 Ma, 1740 Ma, 1710–1705 Ma, 1690–1670 Ma, 1650 Ma, and 1620 Ma. Subduction rollback, ocean basin closure, and the arrival of Laurentia at the Australian-Antarctic convergent margin first led to arc-continent collision at 1650–1640 Ma and then continent-continent collision by 1620 Ma as the last vestiges of the backarc basin collapsed. Collision induced obduction and transfer of the arc and more outboard parts of the Australian-Antarctic backarc basin onto the Laurentian margin, where they remained following later breakup of the Neoproterozoic Rodinia supercontinent. North American felsic rocks generally yield Nd depleted mantle model ages consistent with arc and backarc assemblages built on early Paleoproterozoic Australian crust as opposed to older Archean basement making up the now underlying Wyoming and Superior cratons.

show abstract

“…The tectonic history of the Mount Isa Inlier comprises repeated episodes of rifting, magmatism, and crustal shortening. Pre-1870 Ma basement rocks and sediments were deformed and metamorphosed during the Barramundi Orogeny (Etheridge et al 1987;McDonald et al 1997;Betts et al 2006;Bierlein et al 2011). Maximum age estimates of the Barramundi orogeny are constrained by the 1860 + 3 Ma Zircon age of the Leichhardt volcanics and the 1857 + 3 Ma zircon age of the Kalkadoon granite (Neumann et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Hot lithosphere at Mount Isa: implications for Proterozoic tectonics and mineralisation

Gessner¹

2011

Australian Journal of Earth Sciences

View full text Add to dashboard Cite

Conductive heat transfer in the lithosphere at Mount Isa has been modelled based on published data on heat flow, thermal rock properties, and lithosphere architecture. Modelling results suggest that the high heat flow at Mount Isa is due to a combination of a thicker than normal crust and high concentrations of radioactive elements. During the last major tectonic activity in the Proterozoic, higher concentration of parent isotopes and the additional sedimentary overburden have increased lithosphere temperatures further. These results confirm that heat-producing elements play a key role in the thermal history of the Mount Isa Inlier and in other Australian Proterozoic terrains. The elevated lithosphere temperatures have significant implications for understanding Proterozoic tectonics and mineralisation, in particular the potential for shallow crustal melting, thermal weakening of the lithosphere, and for the evolution of deformation-related permeability. In general, high temperature gradients in continental crust cause a tectonic style dominated by pervasive viscous flow in partially molten crust, which in Mount Isa is evident from the formation of metamorphic core complexes during extension, and the absence of alpine-type nappes during contraction. In contrast, steep shear zones and fabrics formed in the upper crust during shortening of the rift complex in the Mid-Proterozoic Isan Orogeny. It is suggested that these steep structures formed where lateral strength contrasts existed in the lithosphere, caused by the differences in burial depths between cooler, tectonically denuded basement, and hotter basement covered by sedimentary basins. Increased permeability along steeply dipping faults and shear zones enables fluids to flow at higher rates across steep gradients of pressure, temperature and chemical concentration between magmatic, metamorphic and surface reservoirs. It is concluded that the link between thermal and mechanical processes in hot continental lithosphere greatly enhances the likelihood of hydrothermal mineralisation.

show abstract

Pre-1.8 Ga tectono-magmatic evolution of the Kalkadoon–Leichhardt Belt: implications for the crustal architecture and metallogeny of the Mount Isa Inlier, northwest Queensland, Australia

Cited by 19 publications

References 53 publications

Australia and Nuna

Australia and Nuna

Antipodean fugitive terranes in southern Laurentia: How Proterozoic Australia built the American West

Hot lithosphere at Mount Isa: implications for Proterozoic tectonics and mineralisation

Contact Info

Product

Resources

About