Thermal alteration of organic matter in an impact crater and the duration of postimpact heating

John Parnell; G. R. Osinski; P. Lee; P. F. Green; M. Baron

doi:10.1130/G21204.1

Thermal alteration of organic matter in an impact crater and the duration of postimpact heating

John Parnell, G. R. Osinski, P. Lee, P. F. Green, M. Baron

Geology and Geophysics

Research output: Contribution to journal › Article › peer-review

33 Citations (Scopus)

Abstract

The 24-km-diameter Tertiary Haughton impact structure formed in rocks that contained preexisting liquid hydrocarbons. Biomarker ratios in the hydrocarbons show a consistent pattern of variation in degree of heating across the structure. The heating reached a maximum at the crater center and is attributed to hydrothermal activity following impact. Kinetic modeling suggests a time scale of similar to 5 k.y. for the heating, at a maximum temperature of 210 degrees C. The short time scale suggests that in moderate-sized craters, which are abundant on Mars, heating is not so extensive that fossil or extant organic matter would be obliterated.

Original language	English
Pages (from-to)	373-376
Number of pages	3
Journal	Geology
Volume	33
DOIs	https://doi.org/10.1130/G21204.1
Publication status	Published - May 2005

Keywords

Haughton impact structure
impact craters
biomarkers
thermal maturity
thermal alteration
Mars
ARCTIC CANADA
KINETIC-MODEL
MATURITY
ORIGIN
REFLECTANCE
MATURATION
GENERATION
LIFE
OILS

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title = "Thermal alteration of organic matter in an impact crater and the duration of postimpact heating",

abstract = "The 24-km-diameter Tertiary Haughton impact structure formed in rocks that contained preexisting liquid hydrocarbons. Biomarker ratios in the hydrocarbons show a consistent pattern of variation in degree of heating across the structure. The heating reached a maximum at the crater center and is attributed to hydrothermal activity following impact. Kinetic modeling suggests a time scale of similar to 5 k.y. for the heating, at a maximum temperature of 210 degrees C. The short time scale suggests that in moderate-sized craters, which are abundant on Mars, heating is not so extensive that fossil or extant organic matter would be obliterated.",

keywords = "Haughton impact structure, impact craters, biomarkers, thermal maturity, thermal alteration, Mars, ARCTIC CANADA, KINETIC-MODEL, MATURITY, ORIGIN, REFLECTANCE, MATURATION, GENERATION, LIFE, OILS",

author = "John Parnell and Osinski, {G. R.} and P. Lee and Green, {P. F.} and M. Baron",

year = "2005",

month = may,

doi = "10.1130/G21204.1",

language = "English",

volume = "33",

pages = "373--376",

journal = "Geology",

issn = "0091-7613",

publisher = "GEOLOGICAL SOC AMER, INC",

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TY - JOUR

T1 - Thermal alteration of organic matter in an impact crater and the duration of postimpact heating

AU - Parnell, John

AU - Osinski, G. R.

AU - Lee, P.

AU - Green, P. F.

AU - Baron, M.

PY - 2005/5

Y1 - 2005/5

N2 - The 24-km-diameter Tertiary Haughton impact structure formed in rocks that contained preexisting liquid hydrocarbons. Biomarker ratios in the hydrocarbons show a consistent pattern of variation in degree of heating across the structure. The heating reached a maximum at the crater center and is attributed to hydrothermal activity following impact. Kinetic modeling suggests a time scale of similar to 5 k.y. for the heating, at a maximum temperature of 210 degrees C. The short time scale suggests that in moderate-sized craters, which are abundant on Mars, heating is not so extensive that fossil or extant organic matter would be obliterated.

AB - The 24-km-diameter Tertiary Haughton impact structure formed in rocks that contained preexisting liquid hydrocarbons. Biomarker ratios in the hydrocarbons show a consistent pattern of variation in degree of heating across the structure. The heating reached a maximum at the crater center and is attributed to hydrothermal activity following impact. Kinetic modeling suggests a time scale of similar to 5 k.y. for the heating, at a maximum temperature of 210 degrees C. The short time scale suggests that in moderate-sized craters, which are abundant on Mars, heating is not so extensive that fossil or extant organic matter would be obliterated.

KW - Haughton impact structure

KW - impact craters

KW - biomarkers

KW - thermal maturity

KW - thermal alteration

KW - Mars

KW - ARCTIC CANADA

KW - KINETIC-MODEL

KW - MATURITY

KW - ORIGIN

KW - REFLECTANCE

KW - MATURATION

KW - GENERATION

KW - LIFE

KW - OILS

U2 - 10.1130/G21204.1

DO - 10.1130/G21204.1

M3 - Article

VL - 33

SP - 373

EP - 376

JO - Geology

JF - Geology

SN - 0091-7613

ER -

Thermal alteration of organic matter in an impact crater and the duration of postimpact heating

Abstract

Keywords

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