A palaeomagnetic study of quaternary volcanic rocks from Turkey

Sanver, M.

doi:10.1016/0031-9201(68)90038-1

Cited by 49 publications

(15 citation statements)

References 11 publications

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“…5b). Sanver (1968) also showed that the Aydınlar basalt is normally magnetised, indicating eruption during the Jaramillo subchron (*1,070-990 ka). Since there is no possible source east of the modern Tigris for the basalt at Bagıvar, we suggest (on the basis of similarity in age) that this small outlier may be all that remains of the distal part, within the Tigris valley, of the Aydınlar basalt.…”

Section: Age Controlmentioning

confidence: 93%

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Late Cenozoic surface uplift, basaltic volcanism, and incision by the River Tigris around Diyarbakır, SE Turkey

Westaway

Guillou

Seyrek

et al. 2007

Int J Earth Sci (Geol Rundsch)

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We document the staircase of terraces of the River Tigris in the Diyarbakır area of SE Turkey, in the northern Arabian Platform, and improve control on the ages of these terrace deposits by dating of overlying basalt flows using the unspiked K-Ar technique. These fluvial terraces are formed of polymict gravel, including clasts derived from the Anatolian metamorphic terrane farther north as well as of local basalt. At least 9 Tigris terraces have been recognised so far, the highest of which, *200 m above present river level, marks the local transition from stacked deposition to fluvial incision, the timing of which is bounded between the mid Late Miocene and the Middle Pliocene. Our K-Ar dating indicates a hiatus in fluvial incision in the late Early Pleistocene, as basalts dated to 1.22 ± 0.02 and 1.07 ± 0.03 Ma overlie Tigris gravels at very similar levels, *60-70 m above the present river. The lower terraces record the subsequent entrenchment of the modern Tigris valley following an increase in incision rates in the early Middle Pleistocene, evident from the disposition of younger basalt, dated to 0.43 ± 0.02 Ma, capping fluvial gravel only *21-22 m above the present river level. Numerical modelling can account for the observed uplift history, as the response to coupling between surface processes and induced flow in the lower crust, with the mobile lower-crust thin (*5-7 km thick), consistent with the known presence of a thick layer of mafic underplating at the base of the crust beneath the Arabian Platform.

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Section: Age Controlmentioning

confidence: 93%

“…The weighted mean of the date and the younger split of sample 05TR02 is 1,188 ± 12 ka (±2r). Sanver (1968) reported that the basalt is reverse-magnetized at sites near Yeşildere (site 5b in Fig. 5b) and near Karaköprü (site 4; Fig.…”

Section: Age Controlmentioning

confidence: 96%

Late Cenozoic surface uplift, basaltic volcanism, and incision by the River Tigris around Diyarbakır, SE Turkey

Westaway

Guillou

Seyrek

et al. 2007

Int J Earth Sci (Geol Rundsch)

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“…2 km south of the new dating site, basalt overlies a polymict gravel attributable to the Tigris, again 70 m above present river level (Figs 3 and 4(c) and (d)). The correspondence of this altitude with that at the new dating site, and the reversed magnetisation determined by Sanver (1968) at his adjacent site 127 (Fig. 2), suggest that a single basalt flow unit is represented.…”

Section: Formation Of the Tigris Valley At Diyarbakı ıRmentioning

confidence: 97%

“…Deposits of the Yenikö y Formation are unshaded; talus covering the fluvial deposits is omitted. Universal Transverse Mercator co-ordinates are provided for key localities was dated bySanver (1968; …”

mentioning

confidence: 99%

Dating Quaternary volcanism and incision by the River Tigris at Diyarbakır, southeast Turkey

Bridgland

Demi̇r

Seyrek

et al. 2007

J Quaternary Science

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New high-precision Ar-Ar dating of basalt underlying the city of Diyarbakır, southeast Turkey, constrains the Quaternary incision history of the River Tigris, strengthening the pre-existing chronology based on magnetostratigraphy and K-Ar dates. The basalt, which overlies Tigris terrace gravel 70 m above the river, is part of the Karacadag shield volcano complex centred ca. 60 km to the southwest. The reverse-magnetised Diyarbakır basalt, one of relatively few flow units to reach the Tigris valley axis, has been dated to 1196 AE 19 ka (AE2s). Two lower terraces have been recognised in the Diyarbakır area, 46 and 32 m above the present river, with at least one other further downstream. From this evidence the rate of Middle-Late Pleistocene incision by the Tigris can be estimated; it probably reached ca. 0.07 mm a À1 , reflecting the characteristic global increase in uplift rates observed at that time.

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“…Bu radyometrik yaşlar, Solhan güneyinde 4.4±1.08my ve 6.0±1.0my (Pearce vd., 1990), Karakoçan dolayında 4.1±0.32my (Sanver, 1968), Muş dolayındaki ise 4.4±1.3my ve 6.0±0.6my (Türkecan, 1991) olarak alınmıştır. En Geç Miyosen/En Erken Pliyosen'e karşılık gelen bu yaşlar volkanitlerin olasılıkla alt yaş sınırına karşılık gelmektedir ve volkanitlerin alt yaş sınırı da en Geç Miyosen (Messiniyen)'e inebileceğini göstermektedir.…”

Section: Karabakır Formasyonu (Plk)unclassified

Pertek (Tunceli̇) Dolayinin Üst Kretase-Tersi̇yer Jeoloji̇si̇/Strati̇grafi̇si̇

Herece¹,

Acar²

2016

Maden Tetkik Ve Arama Dergisi

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A palaeomagnetic study of quaternary volcanic rocks from Turkey

Cited by 49 publications

References 11 publications

Late Cenozoic surface uplift, basaltic volcanism, and incision by the River Tigris around Diyarbakır, SE Turkey

Late Cenozoic surface uplift, basaltic volcanism, and incision by the River Tigris around Diyarbakır, SE Turkey

Dating Quaternary volcanism and incision by the River Tigris at Diyarbakır, southeast Turkey

Pertek (Tunceli̇) Dolayinin Üst Kretase-Tersi̇yer Jeoloji̇si̇/Strati̇grafi̇si̇

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