Late Devonian and Triassic basalts from the southern continental margin of the East European Platform, tracers of a single heterogeneous lithospheric mantle source

Chalot-Prat, F.; Тихомиров, П. Л.; Saintot, Aline

doi:10.1007/s12040-007-0045-z

Cited by 10 publications

(3 citation statements)

References 62 publications

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“…Volcanoclastic series derived from the Lesser Caucasus volcanic arc are now found imbricated and folded in the southern foothills of the Greater Caucasus where they form distinct tectonosedimentary units (Kangarli 1982(Kangarli , 2005. In situ intrusives remain however rare and are associated with igneous activity on the margins to the south of the Greater Caucasus Basin (Mengel et al 1987;Mustafayev 2001;Chalot-Prat et al 2007).…”

Section: Regional Tectonics and Geodynamicsmentioning

confidence: 99%

Cenozoic-Recent tectonics and uplift in the Greater Caucasus: a perspective from Azerbaijan

et al. 2010

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The Greater Caucasus is Europe's highest mountain belt and results from the inversion of the Greater Caucasus back-arc-type basin due to the collision of Arabia and Eurasia. The orogenic processes that led to the present mountain chain started in the Early Cenozoic, accelerated during the Plio-Pleistocene, and are still active as shown from present GPS studies and earthquake distribution. The Greater Caucasus is a doubly verging fold-and-thrust belt, with a pro-and a retro wedge actively propagating into the foreland sedimentary basin of the Kura to the south and the Terek to the north, respectively. Based on tectonic geomorphology -active and abandoned thrust fronts -the mountain range can be subdivided into several zones with different uplift amounts and rates with very heterogeneous strain partitioning. The central part of the mountain range -defined by the Main Caucasus Thrust to the south and backthrusts to the north -forms a triangular-shape zone showing the highest uplift and fastest rates, and is due to thrusting over a steep tectonic ramp system at depth. The meridional orogenic in front of the Greater Caucasus in Azerbaijan lies at the foothills of the Lesser Caucasus, to the south of the Kura foreland basin.

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Section: Regional Tectonics and Geodynamicsmentioning

confidence: 99%

Cenozoic-Recent tectonics and uplift in the Greater Caucasus: a perspective from Azerbaijan

et al. 2010

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“…Plotting of eight K-bentonite samples on this diagram demonstrates that the precursor volcanic ash(es) had an alkali-basaltic character (Chalot-Prat et al, 2007).…”

Section: Chemical Composition Of Tephrasmentioning

confidence: 96%

“…The Zr/TiO 2 -Nb/Y immobile trace element diagram (Figure 13) is useful to determine the source characteristics of the tephra (Floyd and Winchester, 1978). Plotting of eight K-bentonite samples on this diagram demonstrates that the precursor volcanic ash(es) had an alkali-basaltic character (Chalot-Prat et al, 2007).…”

Section: Chemical Composition Of Tephrasmentioning

confidence: 99%

Clay mineralogy, chemistry, and diagenesis of Late Devonian K-bentonite occurrences in northwestern Turkey

Türkmenoğlu¹,

Bozkaya²,

Göncüoğlu³

et al. 2015

Turkish J Earth Sci

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The products of explosive eruptions in the form of volcanic ash (tephra), after being transported for long distances by wind, are settled and altered to bentonites (smectite-rich volcanogenic clay rocks) in early diagenesis. In late diagenesis, these bentonites are transformed into K-bentonites by chemical modification and K-fixation with progressive illitization and then finally into metabentonites by low-grade metamorphism (Fortey et al., 1996). During diagenesis and very low-grade metamorphism, due to potassium enrichment, smectite transforms to mixed-layer illite-smectite (I-S) and then illite in K-bentonites (Weaver, 1953;Nadeau et al., 1985;Merriman and Roberts, 1990).The discovery of K-bentonites dates back as early as the 1920s. Since then, their geologic importance has been revealed and proven by ongoing interdisciplinary research. Nelson (1921Nelson ( , 1922 originally denoted the pyroclastic nature of some rocks in the Paleozoic rock system in the eastern part of the United States. Following Nelson's original remarks, Allen (1932), based on the crescent-shaped shard structures and the presence of sanidine, apatite, and euhedral zircon crystals, evidenced the volcanic origin of those deposits. Rosenkrans (1934) and Kay (1944aKay ( , 1944b were the first to use bentonites for stratigraphic correlations. The significance of K-bentonites as widespread marker beds has been recognized recently since they are also datable using fission track and U/Pb dating of zircons, K/Ar, and Ar/Ar of amphibole, biotite, and sanidine (Kolata et al., 1996).Worldwide research activities on K-bentonites have diversified aims such as discovering localities and studying their mineralogical, petrographic, and

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Back-arc rifting initiated with a hot and wet continental lithosphere

Yamasaki

Stephenson

2011

Earth and Planetary Science Letters

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Late Devonian and Triassic basalts from the southern continental margin of the East European Platform, tracers of a single heterogeneous lithospheric mantle source

Cited by 10 publications

References 62 publications

Cenozoic-Recent tectonics and uplift in the Greater Caucasus: a perspective from Azerbaijan

Cenozoic-Recent tectonics and uplift in the Greater Caucasus: a perspective from Azerbaijan

Clay mineralogy, chemistry, and diagenesis of Late Devonian K-bentonite occurrences in northwestern Turkey

Back-arc rifting initiated with a hot and wet continental lithosphere

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