THERMOLUMINESCENCE DATING OF QUATERNARY TERRACES IN THE TALEGHAN BASIN, IRAN

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MOEIN ABOLFAZLI; AHMADI HASAN; JAFARI MOHAMMAD; FEIZNIA SADAT; SARMADIAN FEREIDOON

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Journal: JOURNAL OF PHYSICAL GEOGRAPHY Year:2009 | Volume:2 | Issue:5 Page(s): 39-49

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Title

THERMOLUMINESCENCE DATING OF QUATERNARY TERRACES IN THE TALEGHAN BASIN, IRAN

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Keywords

THERMOLUMINESCENCEQ3

QUATERNARYQ3

NORTHWEST OF TEHRANQ3

EQUIVALENT DOSEQ2

Abstract

We report the first THERMOLUMINESCENCE ages for the QUATERNARY sediments of the Taleghan Drainage Basin which is located in Alborz geological zone and in central Alborz sub- zone and about 90 Km NORTHWEST OF TEHRAN, Iran. QUATERNARY deposits in this region have been formed of four terraces (Oldest to youngest: Qt1, Qt2, Qt3 and Qt4). In this researche we study three terraces include Qt2, Qt3 and Qt4. Three samples were collected from the Qt4 (Toria wart), three samples were collected from Qt3 (Wurm) and finally seven samples was taken from Qt2 (Riss) for THERMOLUMINESCENCE datig. THERMOLUMINESCENCE (TL) samples prepared for dating using fine grain method and were analyzed using the combined additive and regenerative method, separated from the bulk sediment sample. Samples from the Toria War terrace yielded ages of 4650+520 years (M114-4), 5000±600 years (M 5-3), and 5200±680 years (M 5-2). Two Samples from the Wurm terrace (agriculture) yielded ages of 9100±800years (M 110-3) and 9400±950 years (M 113-4). A Sample from the Wurm terrace (rangeland) yielded ages of 15600±2000years (M 16-4). The oldest age obtioned from the Riss terrace is 54900±8700 years (M 16-5).sample M123-41 from the Riss yielded an age of>100000 year and we can’t exactly determine age because of TL saturation. we theorize that Riss deposition occurs during arid and cold periods, Wurm deposition occurs at humid (pluvial)–arid transitions and Toria War deposition occurs during flooding periods. However, given the paucity of absolute ages for Taleghan sediments and the general complexity of erosion–deposition processes in most watersheds, more work is required to conﬁrm or reject this theory. In general, luminescence ages were stratigraphically, geomorphically and ordinally consistent and TL ages could be correlated with climatic events. Based upon the TL dating we propose to divide Wurm to two sections, Wurm 1 (agriculture with 0-10% slope) with 9000 years age and Wurm 2 (rangeland with 10- 40% slope) with 15600 years age.

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APA: Copy

MOEIN, ABOLFAZLI, AHMADI, HASAN, JAFARI, MOHAMMAD, FEIZNIA, SADAT, & SARMADIAN, FEREIDOON. (2009). THERMOLUMINESCENCE DATING OF QUATERNARY TERRACES IN THE TALEGHAN BASIN, IRAN. JOURNAL OF PHYSICAL GEOGRAPHY, 2(5), 39-49. SID. https://sid.ir/paper/185092/en

Vancouver: Copy

MOEIN ABOLFAZLI, AHMADI HASAN, JAFARI MOHAMMAD, FEIZNIA SADAT, SARMADIAN FEREIDOON. THERMOLUMINESCENCE DATING OF QUATERNARY TERRACES IN THE TALEGHAN BASIN, IRAN. JOURNAL OF PHYSICAL GEOGRAPHY[Internet]. 2009;2(5):39-49. Available from: https://sid.ir/paper/185092/en

IEEE: Copy

ABOLFAZLI MOEIN, HASAN AHMADI, MOHAMMAD JAFARI, SADAT FEIZNIA, and FEREIDOON SARMADIAN, “THERMOLUMINESCENCE DATING OF QUATERNARY TERRACES IN THE TALEGHAN BASIN, IRAN,” JOURNAL OF PHYSICAL GEOGRAPHY, vol. 2, no. 5, pp. 39–49, 2009, [Online]. Available: https://sid.ir/paper/185092/en

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