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Earth, Planets and Space

Table 1 Mineral assemblages of the ash-fall and syneruptive-spouted type lahar deposits

From: Characteristics of the syneruptive-spouted type lahar generated by the September 2014 eruption of Mount Ontake, Japan

Sample Qz Pl Cr Al Gy Ka Sm Py
Ash-fall deposit ++ + ++ + + tr tr tr
Syneruptive-spouted type lahar deposit (site A) + ++ ++ + tr tr tr tr
Syneruptive-spouted type lahar deposit (site D) + ++ ++ tr + tr tr tr
  1. Abbreviations of minerals Qz quartz, Pl plagioclase, Cr cristobalite, Al alunite, Gy gypsum, Ka kaolinite, Sm smectite, Py pyrite. ++>+>tr relative amounts of minerals
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