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Neotectonic and volcanic characteristics of the Karasu fault zone (Anatolia, Turkey): The transition zone between the Dead Sea transform and the East Anatolian fault zone
Date
2001-01-01
Author
Rojay, Fuat Bora
Toprak, V
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The Karasu Rift (Antakya province, SE Turkey) has developed between east-dipping, NNE-striking faults of the Karasu fault zone, which define the western margin of the rift and west-dipping, N-S to N20 degrees -30 degreesE-striking faults of Dead Sea Transform fault zone (DST) in the central part and eastern margin of the rift. The strand of the Karasu fault zone that bounds the basin from west forms a linkage zone between the DST and the East Anatolian fault zone (EAFZ). The greater vertical offset on the western margin faults relative to the eastern ones indicates asymmetrical evolution of the rift as implied by the higher escarpments and accumulation of extensive, thick alluvial fans on the western margins of the rift. The thickness of the Quaternary sedimentary fill is more than 465 m, with elastic sediments intercalated with basaltic lavas. The Quaternary alkali basaltic volcanism accompanied fluvial to lacustrine sedimentation between 1.57 +/- 0.08 and 0.05 +/- 0.03 Ma. The faults are left-lateral oblique-slip faults as indicated by left-stepping faulting patterns, slip-lineation data and left-laterally offset lava flows and stream channels along the Karasu fault zone. At Hacilar village, an offset lava flow, dated to 0.08 +/- 0.06 Ma, indicates a rate of left-lateral oblique slip of approximately 4.1 mm.year(-1). Overall, the Karasu Rift is an asymmetrical transtensional basin, which has developed between seismically active splays of the left-lateral DST and the left-lateral oblique slip Karasu fault zone during the neotectonic period. (C) 2001 Editions scientifiques et medicales Elsevier SAS.
Subject Keywords
Continental alkali basaltic volcanism
,
Karasu fault zone
,
Karasu Rift
,
Dead Sea transform fault
,
Anatolia
,
Turkey
URI
https://hdl.handle.net/11511/56950
Journal
GEODINAMICA ACTA
DOI
https://doi.org/10.1016/s0985-3111(00)01053-6
Collections
Department of Geological Engineering, Article
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F. B. Rojay and V. Toprak, “Neotectonic and volcanic characteristics of the Karasu fault zone (Anatolia, Turkey): The transition zone between the Dead Sea transform and the East Anatolian fault zone,”
GEODINAMICA ACTA
, pp. 197–212, 2001, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/56950.