Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 2 of 2
Full-Text Articles in Physical Sciences and Mathematics
Timing Of The Quaternary Elazığ Volcanism, Eastern Turkey, And Its Significance For Constraining Landscape Evolution And Surface Uplift, Ali̇ Seyrek, Rob Westaway, Malcolm Pringle, Sema Yurtmen, Tuncer Demi̇r, George Rowbotham
Timing Of The Quaternary Elazığ Volcanism, Eastern Turkey, And Its Significance For Constraining Landscape Evolution And Surface Uplift, Ali̇ Seyrek, Rob Westaway, Malcolm Pringle, Sema Yurtmen, Tuncer Demi̇r, George Rowbotham
Turkish Journal of Earth Sciences
The eastern part of the Anatolian plateau in eastern Turkey has experienced dramatic landscape evolution in the Late Cenozoic, surface uplift having been associated with the disruption of former lake basins and the development of the modern high-relief landscape, incised by the upper reaches of the River Euphrates and its major tributary, the Murat. Overall, the altitude of the plateau decreases gradually westward, and it has been assumed that uplift on any given timescale has varied regionally in a similar manner. However, using the Ar-Ar method, we have dated an episode of basaltic volcanism around the city of Elazığ to …
Petrology And ^{40}Ar-^{39}Ar Age Of The Bimodal Orduzu Volcanics (Malatya) From The Western End Of The Eastern Anatolian Neogene Volcanism, Turkey, Ayten Önal, Durmuş Boztuğ, Mehmet Arslan, Terry L. Spell, Sevcan Kürüm
Petrology And ^{40}Ar-^{39}Ar Age Of The Bimodal Orduzu Volcanics (Malatya) From The Western End Of The Eastern Anatolian Neogene Volcanism, Turkey, Ayten Önal, Durmuş Boztuğ, Mehmet Arslan, Terry L. Spell, Sevcan Kürüm
Turkish Journal of Earth Sciences
The Orduzu volcanics, which are part of the Yamadağ volcanics in the Malatya region, include rhyolite, rhyolitic dykes, trachyandesite and basaltic trachyandesitic dykes. Mafic globular occurrences within the basaltic trachyandesitic dykes, the existence of basaltic trachyandesite enclaves within the trachyandesite, and other textural and geochemical evidence all indicate magma mingling/mixing. Incremental ^{40}Ar-^{39}Ar dating on plagioclase from the rhyolite, from rhyolite dykes and basaltic trachyandesite yielded consistently 16 Ma (Middle Miocene). Primordial mantle-normalized spider diagrams of the rhyolite and rhyolitic dykes represent enrichments in some large ion lithophile elements (Cs, Rb, Ba, K, Th, U) but remarkably depletion in Sr, Nb, …