Thermally altered palagonitic tephra

a spectral and process analog to the soil and dust of Mars

James Bell, R. V. Morris, J. B. Adams

Research output: Contribution to journalArticle

64 Citations (Scopus)

Abstract

We studied six palagonitic soil samples (PH-1 through PH-6) which were collected at 30cm intervals from a lava slab on Mauna Kea, Hawaii. The samples present an alteration sequence caused by heating during emplacement of molten lava over a preexisting tephra cone. They are both spectral and weathering/alteration process analogs to the Martian surface. Techniques employed included visible and near-IR spectroscopy, Mossbauer spectroscopy, and magnetic analysis. The reflectivity specta of samples PH-2 through PH-4 are similar to spectra of palagonites reported by other workers to be good Mars visible to near-IR spectral analogs. The reflectivity spectrum of PH-1 is an even better spectra analog to Mars in that it exhibits absorption features indicative of both nanophase and crystalline ferric oxides (similar to several new Martian telescopic data sets). Our sampling site may also be a process analog for Mars, in that heating episodes by volcanism and/or impact cratering could produce crystalline ferric oxides from poorly crystalline palagonitic material. -from Authors

Original languageEnglish (US)
Pages (from-to)3373-3385
Number of pages13
JournalJournal of Geophysical Research
Volume98
Issue numberE2
StatePublished - 1993
Externally publishedYes

Fingerprint

tephra
mars
Dust
Mars
soils
dust
analogs
Crystalline materials
Soils
lava
reflectivity
oxide
heating
Heating
cratering
Mossbauer spectroscopy
soil
Weathering
reflectance
oxides

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Environmental Science(all)

Cite this

Thermally altered palagonitic tephra : a spectral and process analog to the soil and dust of Mars. / Bell, James; Morris, R. V.; Adams, J. B.

In: Journal of Geophysical Research, Vol. 98, No. E2, 1993, p. 3373-3385.

Research output: Contribution to journalArticle

@article{9a8b931c1f7e4cd980797e2bc7346361,
title = "Thermally altered palagonitic tephra: a spectral and process analog to the soil and dust of Mars",
abstract = "We studied six palagonitic soil samples (PH-1 through PH-6) which were collected at 30cm intervals from a lava slab on Mauna Kea, Hawaii. The samples present an alteration sequence caused by heating during emplacement of molten lava over a preexisting tephra cone. They are both spectral and weathering/alteration process analogs to the Martian surface. Techniques employed included visible and near-IR spectroscopy, Mossbauer spectroscopy, and magnetic analysis. The reflectivity specta of samples PH-2 through PH-4 are similar to spectra of palagonites reported by other workers to be good Mars visible to near-IR spectral analogs. The reflectivity spectrum of PH-1 is an even better spectra analog to Mars in that it exhibits absorption features indicative of both nanophase and crystalline ferric oxides (similar to several new Martian telescopic data sets). Our sampling site may also be a process analog for Mars, in that heating episodes by volcanism and/or impact cratering could produce crystalline ferric oxides from poorly crystalline palagonitic material. -from Authors",
author = "James Bell and Morris, {R. V.} and Adams, {J. B.}",
year = "1993",
language = "English (US)",
volume = "98",
pages = "3373--3385",
journal = "Journal of Geophysical Research: Atmospheres",
issn = "2169-897X",
publisher = "Wiley-Blackwell",
number = "E2",

}

TY - JOUR

T1 - Thermally altered palagonitic tephra

T2 - a spectral and process analog to the soil and dust of Mars

AU - Bell, James

AU - Morris, R. V.

AU - Adams, J. B.

PY - 1993

Y1 - 1993

N2 - We studied six palagonitic soil samples (PH-1 through PH-6) which were collected at 30cm intervals from a lava slab on Mauna Kea, Hawaii. The samples present an alteration sequence caused by heating during emplacement of molten lava over a preexisting tephra cone. They are both spectral and weathering/alteration process analogs to the Martian surface. Techniques employed included visible and near-IR spectroscopy, Mossbauer spectroscopy, and magnetic analysis. The reflectivity specta of samples PH-2 through PH-4 are similar to spectra of palagonites reported by other workers to be good Mars visible to near-IR spectral analogs. The reflectivity spectrum of PH-1 is an even better spectra analog to Mars in that it exhibits absorption features indicative of both nanophase and crystalline ferric oxides (similar to several new Martian telescopic data sets). Our sampling site may also be a process analog for Mars, in that heating episodes by volcanism and/or impact cratering could produce crystalline ferric oxides from poorly crystalline palagonitic material. -from Authors

AB - We studied six palagonitic soil samples (PH-1 through PH-6) which were collected at 30cm intervals from a lava slab on Mauna Kea, Hawaii. The samples present an alteration sequence caused by heating during emplacement of molten lava over a preexisting tephra cone. They are both spectral and weathering/alteration process analogs to the Martian surface. Techniques employed included visible and near-IR spectroscopy, Mossbauer spectroscopy, and magnetic analysis. The reflectivity specta of samples PH-2 through PH-4 are similar to spectra of palagonites reported by other workers to be good Mars visible to near-IR spectral analogs. The reflectivity spectrum of PH-1 is an even better spectra analog to Mars in that it exhibits absorption features indicative of both nanophase and crystalline ferric oxides (similar to several new Martian telescopic data sets). Our sampling site may also be a process analog for Mars, in that heating episodes by volcanism and/or impact cratering could produce crystalline ferric oxides from poorly crystalline palagonitic material. -from Authors

UR - http://www.scopus.com/inward/record.url?scp=0027455929&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0027455929&partnerID=8YFLogxK

M3 - Article

VL - 98

SP - 3373

EP - 3385

JO - Journal of Geophysical Research: Atmospheres

JF - Journal of Geophysical Research: Atmospheres

SN - 2169-897X

IS - E2

ER -