JpGU-AGU Joint Meeting 2017

Presentation information

[JJ] Poster

S (Solid Earth Sciences) » S-TT Technology & Techniques

[S-TT60] [JJ] Contribution of luminescence and ESR dating to earth and planetary sciences

Wed. May 24, 2017 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall HALL7)

[STT60-P08] Estimation of the mixing ratios of quartz in the possible source rocks that make up the present river bed sediments by using ESR

*Aiko Shimada1, Masashi Takada2, Shin Toyoda3 (1.JEOL RESONANCE Inc., 2.Nara Women's University, 3.Okayama University of Science)

Keywords:ESR, Quartz, Provenance of sediments, Mixing ratios of sediments, Present river bed sediments

Bedrock is broken down by weathering into unconsolidated materials, which are then carried downstream by rivers. When a new procedure for clarifying provenance of sediment is established, it can give significant information on the erosion processes, river contention, and crustal movement suggesting the environments at the time of sediment transportation.
Recently, Electron Spin Resonance (ESR) signals are used as indicators of sediment provenance. The E1’ center signal intensity of quartz is shown to be a useful parameter to investigate the provenance of aeolian dust [1] - [3]. The Al, Ti–Li, and E1' center signal intensities of quartz are useful in determining sediment provenance [4]. The Al and Ti–Li center signal intensities of quartz are possible to estimate the mixing ratios of sediment provenance [5].
In this study, we will report estimation of the mixing ratios of the source materials that make up the present river bed sediments by using ESR signal intensities of Al, Ti-Li and E1’ centers.

[1] Naruse, T., Ono, Y., Hirakawa, K., Okashita, M., Ikeya, M., 1997. Source areas of eolian dust quartz in East Asia: a tentative reconstruction of prevailing winds in isotope stage 2 using electron spin resonance. Geogr. Rev. Jpn., 70A-1, 15–27.
[2] Toyoda, S., Naruse, T., 2002. Eolian Dust from Asia Deserts to Japanese Islands since the last Glacial Maximum: the Basis for the ESR Method, J. Geomorph. Union., 23-5, 811-820.
[3] Nagashima, K., Tada, R., Tani, A., Toyoda, S., Sun, Y., Isozaki, Y., 2007. Contribution of aeolian dust in Japan Sea sediments estimated from ESR signal intensity and crystallinity of quartz. Geochemistry, Geophysics, Geosystems 8, Q02Q04, DOI 10.1029/2006GC001364.
[4] Shimada, A., Takada, M., Toyoda, S., 2013. Characteristics of ESR signals and TLCLs of quartz included in various source rocks and sediments in Japan: a clue to sediment provenance. Geochronometria, 40(4), 334-340, DOI 10.2478/s13386-013-0111-z.
[5] Shimada, A., Takada, M., Toyoda, S., 2016. Electron spin resonance signals of quartz in present-day river bed sediments and possible source rocks in the Kizu River basin, western Japan. Geochronometria, in press.