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ESR Chronology of Bedrock Fault Activity in Carbonate Area: Preliminary Results from the Study of the Lijiang-Xiaojinhe Fault, Southeastern Tibet, China

Gongming Yin

Gongming Yin

State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake AdministrationBeijing, China
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Yin, Gongming
, 
Chunru Liu

Chunru Liu

State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake AdministrationBeijing, China
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Liu, Chunru
, 
Renmao Yuan

Renmao Yuan

State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake AdministrationBeijing, China
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Yuan, Renmao
, 
Fei Han

Fei Han

State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake AdministrationBeijing, China
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Han, Fei
, 
Rui Ding

Rui Ding

  • State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake AdministrationBeijing, China
  • Key Laboratory of Crustal Dynamics, Institute of Crustal Dynamics, China Earthquake AdministrationBeijing, China
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Ding, Rui
 e 
Jean-Jacques Bahain

Jean-Jacques Bahain

UMR 7194 HNHP, Département Homme et Environnement du Muséum National d’Histoire NaturelleParis, France
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Bahain, Jean-Jacques
  
31 dic 2021
ESR Chronology of Bedrock Fault Activity in Carbonate Area: Preliminary Results from the Study of the Lijiang-Xiaojinhe Fault, Southeastern Tibet, China's Cover Image
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Categoria dell'articolo: Conference Proceedings of the 5Asia Pacific Luminescence and Electron Spin Resonance Dating Conference October 15–17, 2018, Beijing, China. Guest Editor: Grzegorz Adamiec
Pubblicato online: 31 dic 2021
Pagine: 215 - 221
Ricevuto: 04 feb 2019
Accettato: 03 mar 2020
DOI: https://doi.org/10.2478/geochr-2020-0033
Parole chiave
© 2019 Gongming Yin et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Fig. 1

Location of the Lijiang-Xiaojinhe fault, southeastern Tibet. The red dots denote earthquakes, and the size of red dots denotes magnitude. The sample site is indicated by a black star.
Location of the Lijiang-Xiaojinhe fault, southeastern Tibet. The red dots denote earthquakes, and the size of red dots denotes magnitude. The sample site is indicated by a black star.

Fig. 2

Global (1) and detailed (2) views of the sampling area. Picture (3) is the photo of carbonates sample with indication of the sampling point (red square) on picture (1). Area A: milky white and be melted again thoroughly; area B: yellow-white and be partially melted; area C: grey-green and has not the characteristic of being melted.
Global (1) and detailed (2) views of the sampling area. Picture (3) is the photo of carbonates sample with indication of the sampling point (red square) on picture (1). Area A: milky white and be melted again thoroughly; area B: yellow-white and be partially melted; area C: grey-green and has not the characteristic of being melted.

Fig. 3

ESR spectra of the LX fault nature sample (part C).
ESR spectra of the LX fault nature sample (part C).

Fig. 4

ESR spectra of the LX fault sample (part C) for different artificial irradiation doses.
ESR spectra of the LX fault sample (part C) for different artificial irradiation doses.

Fig. 5

Natural ESR spectra of LX samples (part A, B and C). Mn2+-3 at g=2.0345 and Mn2+-4 at g=1.9804 are two of the six main peaks of the Mn2+ ESR spectrum in calcite.
Natural ESR spectra of LX samples (part A, B and C). Mn2+-3 at g=2.0345 and Mn2+-4 at g=1.9804 are two of the six main peaks of the Mn2+ ESR spectrum in calcite.

Fig. 6

Dose response curves of the g=2.0006 line for LX samples.
Dose response curves of the g=2.0006 line for LX samples.

ESR dating results of the LX fault_

Sample Depth (m) U (μg/g) Th (μg/g) K (%) cosmic dose rate (Gy/ka) D (Gy/ka) De (Gy) Age (ka)
part A 0.30 0.099±0.005 0.192±0.010 0.045±0.002 0.287±0.011 1.074±0.050 1.90±0.20 1.77±0.20
part B 2.10±0.20 1.96±0.20
Part C 4.60±0.40 4.28±0.40
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