Mapping P-T conditions in hydrothermal systems using hyperspectral remote sensing and object based techniques

F.D. Van Der Meer*, F. Van Ruitenbeek, H. Van Der Werff, C. Hecker

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

1 Citation (Scopus)

Abstract

Hydrothermal alteration occurs in active volcanic systems where circulating seawater results in mineral and chemical changes in the volcanic host rocks depending on pressure-temperature conditions and initial chemical composition of the host rock. As by-products of such alteration various precious metals (gold, silver, copper etc) form. Spectral matching techniques are traditionally used in geologic studies using hyperspectral data to generate surface mineral maps which allow to characterize hydrothermal alteration. Using a combination of Al-MgOh and FeOH absorption features we can link spectral features to mineral chemistry thus linking spectroscopy to geochemistry of alteration systems. With contextual image analysis techniques applied to ratio images of combined absorption features we can detect boundaries between alteration zones from hyperspectral data. This allows to reconstruct paleo fluid pathways and interpret these in terms of discharge and recharge areas which are important areas for mineral prospectivity of these systems. The facies successions are important indicators for the genetic nature of these systems. Studying the Australian hydrothermal system of the Pilbara as a proxy to mineral zonations found on the planet Mars allows us to understand the nature of these mineral distributions on Mars.

Original languageEnglish
Title of host publication2nd Workshop on Hyperspectral Image and Signal Processing
Subtitle of host publicationEvolution in Remote Sensing, WHISPERS 2010 - Workshop Program
PublisherIEEE
Number of pages4
ISBN (Print)9781424489077
DOIs
Publication statusPublished - 29 Nov 2010
Event2nd Workshop on Hyperspectral Image and Signal Processing: Evolution in Remote Sensing, WHISPERS 2010 - Reykjavik, Iceland
Duration: 14 Jun 201016 Jun 2010
Conference number: 2

Publication series

Name2nd Workshop on Hyperspectral Image and Signal Processing: Evolution in Remote Sensing, WHISPERS 2010 - Workshop Program

Conference

Conference2nd Workshop on Hyperspectral Image and Signal Processing: Evolution in Remote Sensing, WHISPERS 2010
Abbreviated titleWHISPERS 2010
CountryIceland
CityReykjavik
Period14/06/1016/06/10

Keywords

  • Alteration mineralogy
  • Australia
  • Hydrothermal
  • Mars
  • Object-based
  • Pilbara

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