Research output: Contribution to journal › Article › peer-review
Petrology of alkaline silicate rocks and carbonatites of the Chuktukon massif, Chadobets upland, Russia : Sources, evolution and relation to the Triassic Siberian LIP. / Doroshkevich, Anna G.; Chebotarev, Dmitry A.; Sharygin, Victor V. et al.
In: Lithos, Vol. 332-333, 01.05.2019, p. 245-260.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Petrology of alkaline silicate rocks and carbonatites of the Chuktukon massif, Chadobets upland, Russia
T2 - Sources, evolution and relation to the Triassic Siberian LIP
AU - Doroshkevich, Anna G.
AU - Chebotarev, Dmitry A.
AU - Sharygin, Victor V.
AU - Prokopyev, Ilya R.
AU - Nikolenko, Anna M.
N1 - Publisher Copyright: © 2019
PY - 2019/5/1
Y1 - 2019/5/1
N2 - The petrogenesis of temporally and spatially associated carbonatitic and deeply derived carbonated alkaline silicate magmas provides an opportunity to gain insights into the nature of the deepest lithospheric mantle. The Chuktukon massif, which is part of the Chadobets alkaline ultramafic carbonatite complex (Chadobets upland, Siberian craton) is a carbonatite-melilitite-damtjernite intrusion, whose emplacement was coeval with the Siberian Traps large igneous province (LIP). In this study, the sources of the primary melts are examined, the petrogenetic evolution of the complex is reconstructed and the relationship with the Siberian LIP is also discussed. Isotopic and geochemical information indicate that the source for the Chuktukon primary melts was isotopically moderately depleted and the primary melts were formed by low degree partial melting of garnet carbonated peridotite. Hydrothermal processes caused 18 O- and 13 C- enrichment. The weathering process was accompanied by trace element re-distribution and enrichment of the weathering crust in Zn, Th, U, Nb, Pb and REE, relative to the Chuktukon rocks and a change in radiogenic (Sr, Nd) isotope compositions.
AB - The petrogenesis of temporally and spatially associated carbonatitic and deeply derived carbonated alkaline silicate magmas provides an opportunity to gain insights into the nature of the deepest lithospheric mantle. The Chuktukon massif, which is part of the Chadobets alkaline ultramafic carbonatite complex (Chadobets upland, Siberian craton) is a carbonatite-melilitite-damtjernite intrusion, whose emplacement was coeval with the Siberian Traps large igneous province (LIP). In this study, the sources of the primary melts are examined, the petrogenetic evolution of the complex is reconstructed and the relationship with the Siberian LIP is also discussed. Isotopic and geochemical information indicate that the source for the Chuktukon primary melts was isotopically moderately depleted and the primary melts were formed by low degree partial melting of garnet carbonated peridotite. Hydrothermal processes caused 18 O- and 13 C- enrichment. The weathering process was accompanied by trace element re-distribution and enrichment of the weathering crust in Zn, Th, U, Nb, Pb and REE, relative to the Chuktukon rocks and a change in radiogenic (Sr, Nd) isotope compositions.
KW - Carbonatites
KW - Chadobets upland
KW - Damtjernites
KW - Melilitites
KW - Source characteristics
KW - Triassic Siberian LIP
KW - LIQUID IMMISCIBILITY
KW - IGNEOUS PROVINCE EVIDENCE
KW - FLOOD BASALTS
KW - NORTH TRANSBAIKALIA
KW - TRACE-ELEMENT
KW - DOLOMITE CARBONATITE
KW - MELT INCLUSIONS
KW - ISOTOPIC COMPOSITIONS
KW - GULI MASSIF
KW - OLDOINYO LENGAI VOLCANO
UR - http://www.scopus.com/inward/record.url?scp=85062822336&partnerID=8YFLogxK
U2 - 10.1016/j.lithos.2019.03.006
DO - 10.1016/j.lithos.2019.03.006
M3 - Article
AN - SCOPUS:85062822336
VL - 332-333
SP - 245
EP - 260
JO - Lithos
JF - Lithos
SN - 0024-4937
ER -
ID: 18863387