Using 14C dating of stable humin fractions to assess upbuilding pedogenesis of a buried Holocene humic soil horizon, Towada volcano, Japan

Yudzuru Inoue, Syuntaro Hiradate, Takashi Sase, Mamoru Hosono, Sayaka Morita, Hiroyuki Matsuzaki

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The genesis of a 40-cm-thick buried Holocene humic soil horizon in a 6-m-high sequence near Towada volcano, Japan, was examined by dating stable, plant-derived humin particles by AMS-based radiocarbon (14C), and by analyzing stable carbon isotope ratios (δ13C), phytolith composition, and soil chemical properties. The AMS dating yielded calibrated ages ranging from 7570-7679 to 6180-6313calyr BP. We obtained a strong correlation (r=0.99, ***p<0.001) between sample depth and the mean age. The (now buried) humic soil was formed by the incremental accumulation of tephric loess and aeolian dust at a constant rate of ~30mm per century for at least 1200years. Whilst the soil surface was slowly rising, graminaceous vegetation was supplied at a constant rate so that developmental upbuilding pedogenesis ensued. The soil was buried and isolated by the fall of the Towada-Chuseri tephra about 6200calyr BP. Thus the tephra-soil sequence near Towada volcano represents both developmental and retardant upbuilding pedogenesis.

Original languageEnglish
Pages (from-to)85-90
Number of pages6
JournalGeoderma
Volume167-168
DOIs
Publication statusPublished - Nov 2011

All Science Journal Classification (ASJC) codes

  • Soil Science

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