Research output: Contribution to journal › Article › peer-review
A reconnaissance provenance study of Triassic–Jurassic clastic rocks of the Russian Barents Sea. / Khudoley, Andrey K.; Sobolev, Nikolay N.; Petrov, Eugene O.; Ershova, Victoria B.; Makariev, Alexander A.; Makarieva, Elena V.; Gaina, Carmen; Sobolev, Peter O.
In: GFF, Vol. 141, No. 4, 2019, p. 263-271.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - A reconnaissance provenance study of Triassic–Jurassic clastic rocks of the Russian Barents Sea
AU - Khudoley, Andrey K.
AU - Sobolev, Nikolay N.
AU - Petrov, Eugene O.
AU - Ershova, Victoria B.
AU - Makariev, Alexander A.
AU - Makarieva, Elena V.
AU - Gaina, Carmen
AU - Sobolev, Peter O.
PY - 2019
Y1 - 2019
N2 - Combined U–Pb detrital zircon dating of 21 samples, along with whole-rock chemical composition and Sm–Nd isotopic studies of 39 samples of Triassic and Jurassic rocks from Franz Josef Land and wells in the southern part of the Russian (eastern) Barents Sea, were analyzed for a reconnaissance provenance study. The similarity of detrital zircon age distributions was statistically assessed using the Kolmogorov–Smirnov (K–S) test and points to a common source area for the clastic material of Triassic to Middle Jurassic age. Uralian-age detrital zircons predominate in all samples, with a comparably smaller portion of Caledonian- and Timanian-age detrital zircons. The number of Palaeoproterozoic and Archean grains is very small and becomes significant only in a few Jurassic samples. εNd(t) values gradually decrease from −1.5 to +2.5 in Lower Triassic rocks, to −2.0 to −8.2 in Jurassic rocks, suggesting an increasing influence of ancient metamorphic basement erosion in the younger Jurassic rocks. High Co/Th ratios, suggesting the erosion of mafic rocks, were mainly recorded in Lower Triassic rocks, whereas increasing Th/Sc ratios, suggesting the erosion of felsic rocks, were recorded only in some uppermost Triassic and Jurassic rocks. We identify the Urals and, in addition during the Triassic, the basement of the West Siberian Basin as the main provenance for the studied clastic rocks. By contrast, only a small volume of fine-grained clastic detritus was derived from basement erosion of the East European Craton, which was characterized by a subdued relief during this time.
AB - Combined U–Pb detrital zircon dating of 21 samples, along with whole-rock chemical composition and Sm–Nd isotopic studies of 39 samples of Triassic and Jurassic rocks from Franz Josef Land and wells in the southern part of the Russian (eastern) Barents Sea, were analyzed for a reconnaissance provenance study. The similarity of detrital zircon age distributions was statistically assessed using the Kolmogorov–Smirnov (K–S) test and points to a common source area for the clastic material of Triassic to Middle Jurassic age. Uralian-age detrital zircons predominate in all samples, with a comparably smaller portion of Caledonian- and Timanian-age detrital zircons. The number of Palaeoproterozoic and Archean grains is very small and becomes significant only in a few Jurassic samples. εNd(t) values gradually decrease from −1.5 to +2.5 in Lower Triassic rocks, to −2.0 to −8.2 in Jurassic rocks, suggesting an increasing influence of ancient metamorphic basement erosion in the younger Jurassic rocks. High Co/Th ratios, suggesting the erosion of mafic rocks, were mainly recorded in Lower Triassic rocks, whereas increasing Th/Sc ratios, suggesting the erosion of felsic rocks, were recorded only in some uppermost Triassic and Jurassic rocks. We identify the Urals and, in addition during the Triassic, the basement of the West Siberian Basin as the main provenance for the studied clastic rocks. By contrast, only a small volume of fine-grained clastic detritus was derived from basement erosion of the East European Craton, which was characterized by a subdued relief during this time.
KW - Barents Sea
KW - detrital zircons
KW - geochemistry
KW - Jurassic
KW - provenance
KW - Sm–Nd
KW - Triassic
KW - NOVAYA-ZEMLYA
KW - SEDIMENTS
KW - FRANZ JOSEF LAND
KW - Sm-Nd
KW - SUCCESSION
KW - DETRITAL ZIRCON
KW - GEOCHRONOLOGY
KW - THRUST BELT
KW - EVOLUTION
KW - BASEMENT
UR - http://www.scopus.com/inward/record.url?scp=85072010965&partnerID=8YFLogxK
U2 - 10.1080/11035897.2019.1621372
DO - 10.1080/11035897.2019.1621372
M3 - Article
AN - SCOPUS:85072010965
VL - 141
SP - 263
EP - 271
JO - GFF
JF - GFF
SN - 1103-5897
IS - 4
ER -
ID: 47835648