Refining Rodinia: Geologic Evidence for the Australia–Western U.S. connection in the Proterozoic

Karlstrom, Karl E.; Harlan, Stephen S.; Williams, Michael L.; McLelland, James M.; Geissman, J. W.; Åhäll, Karl‐Inge

doi:10.1130/gsat-1999-10-01-science

Cited by 408 publications

(71 citation statements)

References 32 publications

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“…These results suggest that both the northern and southern margins of the NCB suffered from the Grenvillian orogenic event. Our early Palaeozoic reconstruction of the NCB and Gondwana also favours an alternative Rodinia model, namely the Australia-Western US Connection (Karlstrom et al 1999;Burrett & Berry 2000), in which the northern Qinling fold belt (Kuanping complex) of the NCB was the western continuation of the Grenvillian belt in the eastern margin of Laurentia (Fig. 7).…”

Section: Discussionsupporting

confidence: 55%

Magnetostratigraphic constraints on the Gondwanan origin of North China: Cambrian/Ordovician boundary results

Yang

Otofuji

Sun

et al. 2002

Geophysical Journal International

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Summary A significant gap in the middle Palaeozoic apparent polar wander (APW) path precludes polarity definition of the early Palaeozoic palaeopole for North China. This problem can in part be resolved by the intercontinental correlation of magnetic polarity patterns across small time intervals. A magnetostratigraphic study was carried out on upper Cambrian to lower Ordovician sediments near Zhaogezhuang (long. 118.5°E, lat. 39.7°N), North China. After stepwise thermal or thermal and alternating field demagnetizations, a characteristic magnetic component with normal and antipodal reversed directions was identified. These data, drawn from 49 samples, yield a north palaeopole at long. 294.6°E, lat. 32.9°N (dp = 3.0°, dm = 5.3°). A concordant magnetic polarity pattern around the Cambrian–Ordovician boundary and lowest Ordovician obtained from different continents favours a Southern Hemisphere origin (∼17°) formation site. Using the Cambrian–Ordovician APW paths between North China and Gondwana, we suggest that the North China block (NCB) was part of Gondwana during the Cambro–lowest Ordovician, and started breaking away from Gondwana in the lower Ordovician. This finding is contrary to some palaeomagnetic models where the NCB was quite separate from Gondwana in the late Proterozoic, and was attached to the ‘Pacific’ side of Antarctica.

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Section: Discussionsupporting

confidence: 55%

Magnetostratigraphic constraints on the Gondwanan origin of North China: Cambrian/Ordovician boundary results

Yang

Otofuji

Sun

et al. 2002

Geophysical Journal International

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“…A complex set of palaeomagnetic data places important constraints on the viability of the SWEAT model, restricting its window of feasibility to the late Palaeoproterozoic (Li et al, 2008), or to a narrow c. 1.0-0.8 Ga time interval (Evans, 2009). In contrast, the AUSWUS (Karlstrom et al, 1999(Karlstrom et al, , 2001Burrett and Berry, 2000) models place the proposed conjugate Australia-Antarctica landmass adjacent to the south-western USA, far south of the area considered in this article. The Siberian model (Sears and Price, 2000) calls for a prolonged c. 2.0-0.52 Ga joint Siberia-Laurentia continent that further requires a connection to a northern Australian, 1.61-1.51 Ga zircon source for the Mesoproterozoic Belt-Purcell Supergroup.…”

Section: The Significance Of Late Mesoproterozoic Events In Western Lmentioning

confidence: 99%

“…Tectonic assembly of the supercontinent Rodinia during the late Mesoproterozoic (Dalziel, 1991;Hoffman, 1991;Moores, 1991) is a widely accepted hypothesis, although details of the continental configuration, timing and processes involved in amalgamation remain controversial (e.g. Karlstrom et al, 1999;Sears and Price, 2000;Li et al, 2008;Evans, 2009). In North America, intense, c. 1.3-1.0 Ga contractional deformation and magmatism along the eastern and southern margins of Laurentia (Hoffman, 1989;Davidson, 2008;Mosher et al, 2008), culminating in the c. 1.09-0.98 Ga Grenvillian Orogeny (Hynes and Rivers, 2010), is regarded as the flagship of Rodinian activity worldwide.…”

Section: Introductionmentioning

confidence: 99%

Evidence for late Mesoproterozoic tectonism in northern Yukon and the identification of a Grenville‐age tectonothermal belt in western Laurentia

et al. 2011

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Terra Nova, 23, 307–313, 2011 Abstract New U‐Pb zircon dates from gneissic xenoliths in an Early Cambrian lamprophyre point to late Mesoproterozoic metamorphism and magmatism in the crust beneath northern Yukon. The data indicate a previously unrecognized thermal event in Yukon and extend the recognition of widely spaced 1.3–1.0 Ga igneous, metamorphic and tectonic events along the western margin of Laurentia. Together, these events demonstrate that the north‐western margin of Laurentia was thermally active during a period of traditionally inferred tectonic quiescence. The tectonic setting, intensity and general nature of this late Mesoproterozoic tectonothermal activity are poorly constrained, but their recognition is key to expanding our understanding of the Proterozoic geology of North America. The recognition of this event places new constraints on the palaeotectonic reconstructions of the supercontinent Rodinia.

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“…1). As a consequence, these rocks form a critical region for testing the proposed Proterozoic link between Australia and Laurentia (Dalziel, 1991;Moores, 1991;Brookfield, 1993;Karlstrom et al, 1999Karlstrom et al, , 2001Burrett & Berry, 2000). This hypothesized correlation forms the basis for one of the more influential, albeit still debated, continental reconstructions for the Neoproterozoic.…”

Section: Introductionmentioning

confidence: 98%

Metamorphic evolution of the Georgetown Inlier, northeast Queensland, Australia; evidence for an accreted Palaeoproterozoic terrane?

Boger

Hansen

2004

Journal Metamorphic Geology

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Mineral textures, coupled with thermodynamic modelling in the MnO-Na 2 O-CaO-K 2 O-FeO-MgOAl 2 O 3 -SiO 2 -H 2 O (MnNCKFMASH) model system, of mid-amphibolite facies metapelites from the Georgetown Inlier, northeast Australia, point to the recording of two separate and unrelated metamorphic events. The first occurred contemporaneously with Palaeo-to Mesoproterozoic orogenesis and involved heating and burial to temperatures and pressures of approximately 600-650°C and 6.0-7.0 kbar. Textural evidence for the up-temperature (and pressure) prograde part of this path is inferred from the inclusion of garnet in biotite and staurolite. The second metamorphic event resulted in a low-pressure thermal overprint that is equated with the advective addition of heat to the terrane via the emplacement of the Forsayth Batholith (c. 1550 Ma). This event is inferred from subsequent growth of andalusite and randomly orientated fibrolitic sillimanite after garnet, biotite and staurolite. This two stage metamorphic evolution, when coupled with a number of other distinct geological characteristics, suggests that the Georgetown Inlier is dissimilar to the other Australian Palaeoproterozoic terranes with which it is commonly correlated.

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Refining Rodinia: Geologic Evidence for the Australia–Western U.S. connection in the Proterozoic

Cited by 408 publications

References 32 publications

Magnetostratigraphic constraints on the Gondwanan origin of North China: Cambrian/Ordovician boundary results

Magnetostratigraphic constraints on the Gondwanan origin of North China: Cambrian/Ordovician boundary results

Evidence for late Mesoproterozoic tectonism in northern Yukon and the identification of a Grenville‐age tectonothermal belt in western Laurentia

Metamorphic evolution of the Georgetown Inlier, northeast Queensland, Australia; evidence for an accreted Palaeoproterozoic terrane?

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