Sedimentary records of past earthquakes in Boraboy Lake during the last ca 600 years (North Anatolian Fault, Turkey)

Handle URI:
http://hdl.handle.net/10754/555640
Title:
Sedimentary records of past earthquakes in Boraboy Lake during the last ca 600 years (North Anatolian Fault, Turkey)
Authors:
Avsar, Ulas ( 0000-0002-3224-8399 ) ; Hubert-Ferrari, Aurélia; De Batist, Marc; Schmidt, Sabine; Fagel, Nathalie
Abstract:
Multiproxy sedimentological analyses along 4.9 m-long sequence of Boraboy Lake, which is located on the central eastern part of the North Anatolian Fault (NAF), reveal the sedimentary traces of past large earthquakes in the region. The lake has a relatively large catchment area (10 km2) compared to its size (0.12 km2), which renders sedimentation sensitive to heavy rain/storm events. Accordingly, the background sedimentation, which is composed of faintly laminated reddish/yellowish brown clayey silt, is frequently interrupted by organic-rich intercalations probably due to heavy rain/storm events transporting terrestrial plant remains from the densely vegetated catchment. In addition to frequent organic-rich intercalations, the background sedimentation is interrupted by four mass-wasting deposits (MWD) of which thickness range between 15 and 50 cm. High-resolution ITRAX μXRF data confirms higher homogeneity along the MWDs (E1-E4) compared to the background sedimentation. Based on 137Cs and 210Pbxs dating and radiocarbon chronology, three MWDs detected in Boraboy sequence (E2, E3 and E4) temporally correlate with large historical earthquakes along the NAF; the 1943 Tosya (Ms= 7.6) and/or 1942 Niksar-Erbaa (Ms= 7.1), the 1776 Amasya-Merzifon and the 1668 North Anatolian (Ms= 7.9) earthquakes. The youngest MWD in the sequence (E1), which is dated to early 2000s, does not correlate with any strong earthquake in the region. This MWD was probably a single mass-wasting event due to routine overloading and oversteepening on the delta front formed by the main inlet of the lake. In subaqueous paleoseismology, coevality of multi-location mass-wasting events is used as a criterion to assign a seismic triggering mechanism, and to rule out mass-wasting events due to routine overloading/oversteepening of subaqueous slopes. Within this context, Boraboy sequence provides a valuable example to discuss sedimentological imprints of single- vs. multi-source MWDs.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Sedimentary records of past earthquakes in Boraboy Lake during the last ca 600 years (North Anatolian Fault, Turkey) 2015 Palaeogeography, Palaeoclimatology, Palaeoecology
Journal:
Palaeogeography, Palaeoclimatology, Palaeoecology
Issue Date:
21-May-2015
DOI:
10.1016/j.palaeo.2015.04.031
Type:
Article
ISSN:
00310182
Additional Links:
http://linkinghub.elsevier.com/retrieve/pii/S0031018215002436
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorAvsar, Ulasen
dc.contributor.authorHubert-Ferrari, Auréliaen
dc.contributor.authorDe Batist, Marcen
dc.contributor.authorSchmidt, Sabineen
dc.contributor.authorFagel, Nathalieen
dc.date.accessioned2015-05-25T07:54:35Zen
dc.date.available2015-05-25T07:54:35Zen
dc.date.issued2015-05-21en
dc.identifier.citationSedimentary records of past earthquakes in Boraboy Lake during the last ca 600 years (North Anatolian Fault, Turkey) 2015 Palaeogeography, Palaeoclimatology, Palaeoecologyen
dc.identifier.issn00310182en
dc.identifier.doi10.1016/j.palaeo.2015.04.031en
dc.identifier.urihttp://hdl.handle.net/10754/555640en
dc.description.abstractMultiproxy sedimentological analyses along 4.9 m-long sequence of Boraboy Lake, which is located on the central eastern part of the North Anatolian Fault (NAF), reveal the sedimentary traces of past large earthquakes in the region. The lake has a relatively large catchment area (10 km2) compared to its size (0.12 km2), which renders sedimentation sensitive to heavy rain/storm events. Accordingly, the background sedimentation, which is composed of faintly laminated reddish/yellowish brown clayey silt, is frequently interrupted by organic-rich intercalations probably due to heavy rain/storm events transporting terrestrial plant remains from the densely vegetated catchment. In addition to frequent organic-rich intercalations, the background sedimentation is interrupted by four mass-wasting deposits (MWD) of which thickness range between 15 and 50 cm. High-resolution ITRAX μXRF data confirms higher homogeneity along the MWDs (E1-E4) compared to the background sedimentation. Based on 137Cs and 210Pbxs dating and radiocarbon chronology, three MWDs detected in Boraboy sequence (E2, E3 and E4) temporally correlate with large historical earthquakes along the NAF; the 1943 Tosya (Ms= 7.6) and/or 1942 Niksar-Erbaa (Ms= 7.1), the 1776 Amasya-Merzifon and the 1668 North Anatolian (Ms= 7.9) earthquakes. The youngest MWD in the sequence (E1), which is dated to early 2000s, does not correlate with any strong earthquake in the region. This MWD was probably a single mass-wasting event due to routine overloading and oversteepening on the delta front formed by the main inlet of the lake. In subaqueous paleoseismology, coevality of multi-location mass-wasting events is used as a criterion to assign a seismic triggering mechanism, and to rule out mass-wasting events due to routine overloading/oversteepening of subaqueous slopes. Within this context, Boraboy sequence provides a valuable example to discuss sedimentological imprints of single- vs. multi-source MWDs.en
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S0031018215002436en
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Palaeogeography, Palaeoclimatology, Palaeoecology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Palaeogeography, Palaeoclimatology, Palaeoecology, 21 May 2015. DOI: 10.1016/j.palaeo.2015.04.031en
dc.subjectBoraboy Lakeen
dc.subjectlacustrine paleoseismologyen
dc.subjectradiochronologyen
dc.subjectseismoturbiditeen
dc.subjecthomogeniteen
dc.subjectmass-wasting depositsen
dc.titleSedimentary records of past earthquakes in Boraboy Lake during the last ca 600 years (North Anatolian Fault, Turkey)en
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalPalaeogeography, Palaeoclimatology, Palaeoecologyen
dc.eprint.versionPost-printen
dc.contributor.institutionRenard Centre of Marine Geology (RCMG), Ghent University, Krijgslaan 281, 9000 Gent, Belgiumen
dc.contributor.institutionUnit of Physical and Quaternary Geography, University of Liège, Sart Tilman, B- 4000 Liège, Belgiumen
dc.contributor.institutionUMR 5805 EPOC OASU, University of Bordeaux, 33615 Pessac, Franceen
dc.contributor.institutionAGEs, Department of Geology, University of Liège, Sart Tilman, B- 4000 Liège, Belgiumen
kaust.authorAvsar, Ulasen
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