Coarse versus fine-grain quartz optical dating of the sediments related to the 1985 Ms7.1 Wuqia earthquake, northeastern margin of the Pamir salient, China

• Autorzy: Yang H. , Chen J. , Porat N. , Li T. , Li W. , Xiao W.

Identyfikatory

DOI

10.1515/geochr-2015-0075

• Konferencja: Conference Proceedings of the 4th Asia Pacific Luminescence and Electron Spin Resonance Dating Conference Nov 23rd-25th, 2015, Adelaide, Australia
• Języki publikacji: EN

Abstrakty

EN

Optical dating of earthquake related sediments were investigated including one modern sample and three samples from a trench excavated across the 1985 Ms7.4 Wuqia Earthquake surface rupture. The results indicated that equivalent dose (De) values vary with grain size and the method used for De determination. The residual dose of the modern sample is 0.1 ka ( 0.2+0.2−0.1 Gy) for the quartz single grain measurements. Only 1.5–3.6% of the grains have a detectable OSL signal. Single grain quartz ages are similar to the expected ages. Fine grain quartz results overestimate the De values and are much older than single grain quartz and coarse grain quartz small aliquot standardized growth curve (SA-SGC) ages. Single grain quartz OSL dating may be optimal for dating earthquake related deposits, but SA-SGC can save measurement time and has potential for dating some poorly bleaching samples.

Słowa kluczowe

EN

paleo-earthquake; quartz OSL dating; single grain; coarse grain

• Wydawca: De Gruyter
• Czasopismo: Geochronometria
• Rocznik: 2017
• Tom: Vol. 44, no. 1
• Strony: 299--306
• Opis fizyczny: Bibliogr. 32 poz., rys.

Twórcy

autor

Yang H.

• State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing 100029, China

autor

Chen J.

• State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing 100029, China

autor

Porat N.

• Geological Survey of Israel, 30 Malkhe Israel Street, Jerusalem 95501 ,Israel

autor

Li T.

• Guangdong Provincal Key Lab of Geodynamics and Geohazards, School of Earth Sciences and Engineering, Sun Yat-sen University, Guangzhou 510275, China

autor

Li W.

• Institute of Earthquake Science, China Earthquake Administration, Beijing 100036, China

autor

Xiao W.

• Anhui Earthquake Administration, Hefei 230031, China

Bibliografia

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).