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980-970 Ma Sette-Da...
980-970 Ma Sette-Daban event of the Siberian craton : new geochronological and geochemical data, relationship to LIP and potential connection with other LIPs
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- Savelev, Aleksandr D. (författare)
- A.P. Karpinsky Russian Geological Research Institute,Saint Petersburg State University
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- Khudoley, A. K. (författare)
- Saint Petersburg State University
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- Malyshev, S. V. (författare)
- Saint Petersburg State University
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Chamberlain, K. R. (författare)
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- Ernst, R. E. (författare)
- Carleton University
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- Pazukhina, A. A. (författare)
- Saint Petersburg State University
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- Prokopiev, A. V. (författare)
- Diamond and Precious Metal Geology Institute of the Siberian Branch Of The Russian Academy Of Sciences
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- Söderlund, U. (författare)
- Lund University,Lunds universitet,Berggrundsgeologi,Geologiska institutionen,Naturvetenskapliga fakulteten,Lithosphere and Biosphere Science,Department of Geology,Faculty of Science
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- Lebedeva, O. Yu (författare)
- A.P. Karpinsky Russian Geological Research Institute
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- Bilali, H. El (författare)
- Carleton University
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Moskalenko, A. N. (författare)
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AP. Karpinsky Russian Geological Research Institute Saint Petersburg State University (creator_code:org_t)
- Engelska.
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Ingår i: International Geology Review. - 0020-6814.
- Relaterad länk:
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The paper presents new geological, geochronological, geochemical and Nd-Sr isotopic data on the Meso- Neoproterozoic dolerites of the Siberian Craton. New U-Pb baddeleyite and apatite ages of a E-W-trending dyke and two sills from southeastern Siberia are 982 ± 11, 977 ± 7, 970 ± 31 and 972 ± 60 Ma, respectively, extending the area of distribution of the event by more than 100 km to the north. The Sette-Daban intrusions are subalkalic mostly low-Ti dolerites, although high-Ti dolerites have been locally documented as well. Trace element abundances in dolerites vary from typical to E-MORB to OIB with arc-like signatures represented by high Th/Yb and low TiO2/Yb ratios. All dolerite samples display moderately positive εNd(t) values varying from +3.3 to +7.7 and indicating the magmas were derived from a depleted mantle source. E-MORB and OIB intrusions are attributed to the different degree of interaction of magma between the depleted asthenospheric mantle and regions within the sub-continental lithospheric mantle (SCLM) that were metasomatically enriched during earlier subduction events. Available data on Sette-Daban event distribution, composition and duration satisfy the characteristics of a typical Large Igneous Province (LIP). Similar age 1000–950 Ma mafic magmatism is also recognized in the Baltic and Amazonian cratons and can be potentially correlated with the Sette-Daban event.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geologi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geology (hsv//eng)
Nyckelord
- geochemistry
- large igneous province
- meso-neoproterozoic
- Sette-daban event
- Siberian craton
- U-Pb geochronology
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Savelev, Aleksan ...
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Khudoley, A. K.
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Malyshev, S. V.
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Chamberlain, K. ...
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Ernst, R. E.
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Pazukhina, A. A.
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visa fler...
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Prokopiev, A. V.
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Söderlund, U.
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Lebedeva, O. Yu
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Bilali, H. El
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Moskalenko, A. N ...
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visa färre...
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