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Analyzing Dendritic Morphology in Columns and Layers
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DendroScan: an open source tool to conduct comparative statistical tests and dendrogrammatic analyses on particle

T Dürig1,2, L S Schmidt3, J D L White4

  • 1Geology Department, University of Otago, Dunedin, New Zealand. tobi@hi.is.

Scientific Reports
|December 11, 2020
PubMed
Summary
This summary is machine-generated.

DendroScan, a new Matlab program, aids volcanologists in analyzing pyroclast shape for eruption studies. It uses statistical and dendrogrammatic methods to compare volcanic ash samples and infer eruption dynamics.

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Area of Science:

  • Volcanology and Petrology
  • Geochemistry
  • Statistical Analysis

Background:

  • Quantitative shape analysis of juvenile pyroclasts is crucial for reconstructing eruption dynamics, tephra transport, and dispersal.
  • Morphometric analyses commonly involve comparing datasets using dimensionless shape parameters.
  • A need exists for integrated statistical tools to facilitate these complex comparisons.

Purpose of the Study:

  • To introduce DendroScan, an open-source Matlab program designed for comprehensive morphometric comparisons of pyroclast shape data.
  • To provide volcanologists with a statistical toolbox for multivariate analysis, including dendrogrammatic approaches.
  • To demonstrate the utility of DendroScan in inferring eruptive mechanisms and melt cooling histories.

Main Methods:

  • Development and implementation of DendroScan, an open-source Matlab program.
  • Inclusion of statistical tests: Levene's, t-tests, and equivalence tests.
  • Integration of dendrogrammatic analysis for morphometric dissimilarity sorting and sample comparison.

Main Results:

  • DendroScan successfully performs multivariate statistical analyses and generates interpretable graphs.
  • Dendrogrammatic analysis effectively sorts samples by morphometric dissimilarity, identifying statistically equivalent groups.
  • Application to Havre 2012 eruption samples demonstrates inference of eruptive mechanisms and melt cooling history.

Conclusions:

  • DendroScan offers a robust, user-friendly platform for advanced pyroclast morphometric analysis in volcanology.
  • The program facilitates detailed comparisons between experimental and natural volcanic ash datasets.
  • DendroScan's capabilities aid in understanding eruption processes and the thermal evolution of magmas.