Chew, D.

Ernst, Richard E.

Gumsley, Ashley P.

Kamo, S. L.

Knoper, M.

Mamuse, A.

Sałacińska, A.

Szopa, K.

Söderlund, Ulf

English

Tomsk State University Repository

МИНИСТЕРСТВО НАУКИ И ВЫСШЕГО ОБРАЗОВАНИЯ РОССИЙСКОЙ ФЕДЕРАЦИИНАЦИОНАЛЬНЫЙ ИССЛЕДОВАТЕЛЬСКИЙ ТОМСКИЙ ГОСУДАРСТВЕННЫЙ УНИВЕРСИТЕТ                LARGE IGNEOUS PROVINCES THROUGH EARTH HISTORY: MANTLE PLUMES, SUPERCONTINENTS, CLIMATE CHANGE,  METALLOGENY AND OIL-GAS, PLANETARY ANALOGUES  (LIP – 2019)Abstract volume of the 7 International ConferenceTomsk, Russia, 28 August – 8 September 2019КРУПНЫЕ ИЗВЕРЖЕННЫЕ ПРОВИНЦИИ В ИСТОРИИ ЗЕМЛИ: МАНТИЙНЫЕ ПЛЮМЫ, СУПЕРКОНТИНЕНТЫ, КЛИМАТИЧЕСКИЕ  ИЗМЕНЕНИЯ, МЕТАЛЛОГЕНИЯ, ФОРМИРОВАНИЕ НЕФТИ И ГАЗА,  ПЛАНЕТЫ ЗЕМНОЙ ГРУППЫ (КИП – 2019)Тезисы VII Международной конференцииТомск, Россия 28 августа – 8 сентября 201947THE KALAHARI AND GRUNEHOGNA CRATONS, AND THEIR PLACEMENT  WITHIN NEOPROTEROZOIC RODINIA, DEFINED BY NEW U-PB GEOCHRONOLOGY  ON LARGE IGNEOUS PROVINCESGumsley A.1,2,3, Sałacińska A.4, Knoper M.5, Mamuse A.3, Chew D.6, Söderlund U.2,7,  Kamo S.8, Szopa K.9, Ernst R. E.10,11 1Institute of Geophysics, Polish Academy of Sciences, Warsaw, Poland.2Department of Geology, Lund University, Lund, Sweden.3Faculty of Mining and Mineral Processing Engineering, Midlands State University, Zvishavane, Zimbabwe.4Institute of Geological Sciences, Polish Academy of Sciences, Warsaw, Poland.5Department of Geology, University of Johannesburg, Johannesburg, South Africa.6Department of Geology, Trinity College, Dublin, Ireland.7Department of Geoscience, Swedish Museum of Natural History, Stockholm, Sweden.8Department of Earth Sciences, University of Toronto, Toronto, Canada.9Faculty of Earth Sciences, University of Silesia, Sosnowiec, Poland10Department of Earth Sciences, Carleton University, Ottawa, Canada.11Faculty of Geology and Geography, Tomsk State University, Tomsk, RussiaKeywords: Fingeren, Mutare, dyke swarm, Neoproterozoic, RodiniaThe Grunehogna Craton of Dronning Maud Land in Ant-arctica and the Kalahari Craton of southern Africa are gener-ally accepted to have been contiguous, in either close or far fit configurations, between 1.11 Ga and 0.18 Ga. In this study, dykes of the Fingeren dyke swarm in Grunehogna and dykes of the Mutare dyke swarm in Kalahari were dated using U-Pb on baddeleyite and apatite. The ages reveal similar mafic mag-matism at ca. 720 Ma in both areas, which has not been reset by later metamorphic events. This confirms the relationship whereby Grunehogna is a rifted fragment of Kalahari, which was severed during the Jurassic breakup of Pangea into Africa and Antarctica. It also confirms a close fit between the cratons at ca. 720 Ma. The possibility that Kalahari was adjacent to north-western Laurentia during the Neoproterozoic should be considered, based on geological evidence. This includes shared magmatism at 790-780 Ma between the Gannoukou-riep and Gunbarrel large igneous provinces (LIPs) as well as a connection between various LIPs at 730-710 Ma making the combined Franklin-Mutare-Fingeren-Irkutsk LIP one of the largest in geological history (also including Siberia), and an ideal trigger for the Cryogenian to Ediacaran glacial period that followed. Interplay between mantle plumes, LIPs, glacia-tion and Rodinia fragmentation likely led to the rise in free oxygen and multi-cellular life toward the Cambrian boundary.AcknowledgementsAshley Gumsley acknowledges financial support from the National Science Center in Poland (grant agreement no. UMO2016/23/P/ST10/02423). This grant has received fund-ing from the Marie Sklodowska-Curie Actions COFUND2014 (grant agreement no. 665778). Anna Sałacińska acknowledg-es financial support from internal projects for young scientists (2018-2019) at the Institute of Geological Sciences, Polish Academy of Sciences, Warsaw in Poland.ULKAN-BILYAKCHAN LIP (CA. 1.7 GA), SE SIBERIAN PLATFORM,  ASSOCIATED TRIPLE JUNCTION RIFTING, AND ORE DEPOSITSGuryanov V. A.1, Ernst R. E.2,31Kosygin Institute of Tectonics and Geophysics, FEB RAS, Khabarovsk, Russia;  2Department of Earth Sciences, Carleton University, Ottawa, Canada  3Faculty of Geology and Geography, Tomsk State University, Tomsk, Russia Keywords: LIP, ore deposit, SiberiaThe Ulkan paleorift system (SE Siberia) has characteris-tics of a three-armed structure indicative of the intense rifting in response to hotspot activity; The triple junction appears as a zone that underwent intense intra-plate A-type alkaline-granitic magmatism in the Late Paleoproterozoic. (Guryanov, 2007; Guryanov et al., 2012; Larin, 2011; Guryanov & Pes-kov, 2017). The presence of both subalkaline granitoids and volcanic rocks (K-series) and alkaline granites, comendites and pantellerites (Na-series) intensely fractionated, is charac-teristic of the Ulkan anorogenic magmatism. A specific fea-ture of these granites is that they contain iron-enriched ferro-magnesian silicates, and alkaline granites that contain alkali amphibole and pyroxene and astrophyllite. Globally, A-type granites are often associated with depos-its of Sn, W, Be, Nb, Ta, REE, Au, U and Fe, such as Piting in Brazil, Thor Lake and Strange Lake in Canada, Zaiplats in South Africa, Katuginskoe of the Aldan-Stanovoi shield (La-rin, 2011).The Ulkan intraplate alkali-granite magmatism of the Ul-kan massif is host to endogenous ore deposits unique in di-mensions and diversity (Be, Ta, Nb, Zr, REEU, Au, Li, Sn, W, Mo, Ti and (Pt)) (Guryanov, 2007). Rare metal and rare earth 

The Kalahari and Grunehogna Cratons, and their placement within neoproterozoic Rodinia, defined by new U-Pb geochronology on large igneous provinces

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The Kalahari and Grunehogna Cratons, and their placement within neoproterozoic Rodinia, defined by new U-Pb geochronology on large igneous provinces

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