Evolution of Palaeoproterozoic mafic intrusions located within the thermal aureole of the Sudbury Igneous Complex, Canada: Isotopic, geochronological and geochemical evidence

Prevec, Stephen A.; Baadsgaard, H.

doi:10.1016/j.gca.2004.10.022

Cited by 12 publications

(3 citation statements)

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“…In addition, several small Paleoproterozoic mafic intrusions of the East Bull Lake suite (ca. 2.45-2.48 Ga) occur along the SIC margin (Prevec and Baadsgaard, 2005).…”

Section: Geology Of the Sudbury Igneous Complexmentioning

confidence: 96%

Shallow impact: Isotopic insights into crustal contributions to the Sudbury impact melt sheet

Darling

Hawkesworth

Storey

et al. 2010

Geochimica et Cosmochimica Acta

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“…In addition, several small Paleoproterozoic mafic intrusions of the East Bull Lake suite (ca. 2.45-2.48 Ga) occur along the SIC margin (Prevec and Baadsgaard, 2005).…”

Section: Geology Of the Sudbury Igneous Complexmentioning

confidence: 96%

Shallow impact: Isotopic insights into crustal contributions to the Sudbury impact melt sheet

Darling

Hawkesworth

Storey

et al. 2010

Geochimica et Cosmochimica Acta

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“…The age estimates span *40 Ma from 2490 to 2445 Ma. The most precise U-Pb age estimates are 2446 ± 3 Ma for the younger phase of the radiating dyke swarm (Heaman 1997); 2459 ± 5 Ma for another dyke (Halls et al 2005), 2441 ± 3 Ma for the Falconbridge Township intrusion (Prevec and Baadsgaard 2005), and 2475 ± 2 Ma for the River Valley anorthosite layered intrusion (Heaman 1995). Until more precise ages are obtained for additional dykes and other units, it will not be known whether the magmatism has a multipulse character or whether the distribution of ages throughout this interval is semi-continuous.…”

Section: -2500 Ma: Southern and Sutheastern Margins Of Superior Cmentioning

confidence: 99%

Large igneous provinces (LIPs), giant dyke swarms, and mantle plumes: significance for breakup events within Canada and adjacent regions from 2.5 Ga to the PresentThis article is one of a selection of papers published in this Special Issue on the the theme Lithoprobe—parameters, processes, and the evolution of a continent.Lithoprobe Contribution 1482. Geological Survey of Canada Contribution 20100072.

2010

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Large igneous provinces (LIPs) are high volume, short duration pulses of intraplate magmatism consisting mainly of flood basalts and their associated plumbing system, but also may include silicic components and carbonatites. Many LIPs have an associated radiating diabase dyke swarm, which typically converges on a cratonic margin, identifies a mantle plume centre, and is linked to breakup or attempted breakup to form that cratonic margin. We hypothesize that every major breakup margin in Canada can be associated with a LIP, and we attempt to identify this LIP. To this end, we focus mainly on high-precision age determinations and the distribution of diabase dyke swarms, which are uniquely valued for preserving the record of magmatic events. The analysis extends from the Phanerozoic to the Neoarchean, but our most complete information is for the Superior craton. There, events at 2.50-2.45, 2.22-2.17, and 2.12-2.08 Ga (LIP and plume) are linked with rifting and breakup or attempted breakup of the south-southeastern, northeastern, and southern margins, respectively. Events at 2.00-1.97 Ga are probably linked with the northern margin (Ungava promontory), while the CircumSuperior event at ca. 1.88 Ga is linked to the north to northwestern margins during a time of Manikewan Ocean closure. Similar linkages for other cratons of North America improve understanding of the breakup history to help identify which blocks were nearest neighbours to Canadian crustal blocks in Precambrian supercontinents. Such interpretations provide a framework for interpreting other geological features of these margins to further test models for the timing and location of breakup.Résumé : De nombreuses grandes provinces ignées (LIP) résultent de pulsations de courte durée et de grand volume de magmatisme intraplaque. Elles comprennent principalement des basaltes de plateaux et les systèmes de « plomberie » associés; elles peuvent aussi inclure des composantes siliceuses et des carbonatites. De nombreuses LIP ont un essaim de dykes de diabase qui en rayonnent, lequel converge typiquement vers une bordure cratonique, identifie un centre de panache de manteau et est relié à un fractionnement ou à une tentative de fractionnement pour former la bordure du craton. Nous posons l'hypothèse que chaque grand fractionnement au Canada peut être associé à une LIP et nous tentons d'identifier cette LIP. Pour ce faire, nous nous concentrons surtout sur les déterminations d'âge de grande précision et la distribution des essaims de dykes de diabase, lesquels sont très estimés pour leur préservation des données des événements magmatiques. L'analyse s'étend du Phanérozoïque au Néoarchéen, mais nos données les plus complètes concernent le craton du Supé-rieur. Là, les événements à 2,50-2,45 Ga, 2,22-2,17 Ga et 2,12-2,08 Ga (LIP et panache) sont reliés à la distension et au fractionnement ou à une tentative de fractionnement respectivement des bordures sud-sud-est, nord-est et sud. Les événe-ments qui se sont déroulés vers 2,00-1,97 Ga sont probablement reliés à la b...

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“…According to previous studies on the spatial distribution of Rodinia supercontinent [7,19,20,28,29,[60][61][62][63][64], India, Tarim, Australia, SCC and East Antarctica were considered as the western group, while Laurentia, Baltic, Siberia and NCC as the eastern group of paleocontinents [44,65,66]. A super mantle plume was developed under the western group of paleocontinents, whose core was located in the junction of Australia, SCC and East Antarctic [39,[67][68][69][70][71][72][73][74].…”

Section: Plos Onementioning

confidence: 99%

Analysis of proto-type Tarim Basin in the late Precambrian and the dynamic mechanism of its evolution

Chang,

Hou,

Huang

et al. 2023

PLoS ONE

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Tarim Basin has undergone an intricate tectonic evolution history ever since its formation from two discrete terranes in Neoproterozoic rather than in the Paleoproterozoic. More precisely, the amalgamation is assumed to happen during 1.0–0.8 Ga based on plate affinity. As the beginning of a unified Tarim block, studies of Tarim Basin in the Precambrian are basic and important. After the amalgamation of south and north paleo-Tarim terranes, Tarim block was experiencing a complicated tectonic process of being affected by mantle plume related to the breakup of Rodinia supercontinent in the south, and compressed by the Circum-Rodinia Subduction System in the north. The breakup of Rodinia supercontinent finished in the late Sinian Period, leading Kudi Ocean and Altyn Ocean to open and separating Tarim block from itself. According to the residual strata thickness, drilling data, and lithofacies distribution, the proto-type basin and tectono-paleogeographic maps of Tarim Basin in the late Nanhua Period and Sinian Period are reconstructed. With these maps, the characteristics of the rifts are revealed. Two rift systems were developed inside the unified Tarim Basin in the Nanhua Period and Sinian Period, one back-arc rift system in the northern margin and the other aulacogen system in the southern margin. The azimuth distribution of the rifts in Quruqtagh showed a predominant NE-SW trend, and the rifts in Aksu trended mainly NW-SE, while the rifts in Tiekelike trended SW-NE. With a three-dimensional elastic FEM (Finite Element Method) model that includes all rifts and deposited areas in Tarim Basin, applying the southern subduction and northern mantle upwelling properly to get the paleotectonic mian stress axes and the differential stress field, the dynamic mechanisms of rifts evolution are proved to be related to the peripheral tectonic environment mentioned above.

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Evolution of Palaeoproterozoic mafic intrusions located within the thermal aureole of the Sudbury Igneous Complex, Canada: Isotopic, geochronological and geochemical evidence

Cited by 12 publications

References 60 publications

Shallow impact: Isotopic insights into crustal contributions to the Sudbury impact melt sheet

Shallow impact: Isotopic insights into crustal contributions to the Sudbury impact melt sheet

Analysis of proto-type Tarim Basin in the late Precambrian and the dynamic mechanism of its evolution

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