Post-impact hydrothermal alteration of the Manson impact structure

McCarville, P.; Crossey, L. J.

doi:10.1130/0-8137-2302-7.347

Cited by 70 publications

(86 citation statements)

References 19 publications

(44 reference statements)

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“…IHT is a well known phenomenon that has been found at several terrestrial craters varying in size and target compositions (e.g., Koeberl et al 1989;McCarville and Crossey 1996;Ames et al 1998;Sturkell et al 1998;Naumov 2002;Osinski et al 2001Osinski et al , 2005Kirsimäe et al 2002;Hagerty and Newsom 2003;Hode et al 2003;Versh et al 2005); similar features have also been suggested for impacts on extraterrestrial planetary bodies (e.g., Allen et al 1982). At the Ries crater, IHT has been addressed in detail by Newsom et al (1986) and Osinski (2003Osinski ( , 2005, and Osinski et al (2004).…”

Section: Introductionmentioning

confidence: 99%

Post‐impact alteration of surficial suevites in Ries crater, Germany: Hydrothermal modification or weathering processes?

Muttik

Kirsimäe

Somelar

et al. 2008

Meteorit & Planetary Scien

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Abstract-Alteration of surficial suevites at Ries crater, Germany was studied by means of X-ray diffraction and scanning electron microscopy. Here, we discuss the origin of hydrous silicate (clay) phases in these suevites that have been previously interpreted as resulting from post-impact hydrothermal processes. The results of this study indicate that the dominant alteration phases are dioctahedral Al-Fe montmorillonite and halloysite, which are typical low temperature clay minerals. We suggest that the surficial suevites are not altered by hydrothermal processes and that alteration occurred by low temperature subsurface weathering processes. If the surficial suevites were indeed hydrothermally modified during the early stages of post-impact cooling, then the alteration was of limited character and is completely masked by later weathering.

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Section: Introductionmentioning

confidence: 99%

Post‐impact alteration of surficial suevites in Ries crater, Germany: Hydrothermal modification or weathering processes?

Muttik

Kirsimäe

Somelar

et al. 2008

Meteorit & Planetary Scien

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“…Heat sources in impact craters include the impact melt deposits (Newsom 1980), heat that was deposited into the target rocks via shock waves, and heat due to the uplift of basement rocks (McCarville and Crossey 1996). In the case of the Lonar system, Nayak (1996) suggested that hydrothermal activity developed as the result of groundwater supplies interacting with the remnant impact energy (e.g., Newsom 1980;Newsom et al 1996).…”

Section: Implications Of Hydrothermal Alteration Of Basalts In the Lomentioning

confidence: 99%

“…observation that the formation of impact-induced hydrothermal systems at other larger terrestrial craters appears to be a relatively common process (Allen, Gooding, and Keil 1982;Newsom et al 1986;McCarville and Crossey 1996).…”

Section: Implications Of Hydrothermal Alteration Of Basalts In the Lomentioning

confidence: 99%

“…Therefore, the Lonar crater may be one of the best terrestrial analogues for studying geochemical processes on the basaltic surface of Mars. Previous studies that have attempted to use terrestrial craters as martian analogues involved craters that were emplaced into more felsic, and therefore, less representative target rock (e.g., Newsom et al 1986;Morris et al 1995;McCarville and Crossey 1996).…”

Section: Introductionmentioning

confidence: 99%

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Hydrothermal alteration at the Lonar Lake impact structure, India: Implications for impact cratering on Mars

Hagerty

Newsom

2003

Meteorit & Planetary Scien

101

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Abstract-The 50,000 year old, 1.8 km diameter Lonar crater is one of only two known terrestrial craters to be emplaced in basaltic target rock (the 65 million year old Deccan Traps). The composition of the Lonar basalts is similar to martian basaltic meteorites, which establishes Lonar as an excellent analogue for similarly sized craters on the surface of Mars. Samples from cores drilled into the Lonar crater floor show that there are basaltic impact breccias that have been altered by post-impact hydrothermal processes to produce an assemblage of secondary alteration minerals. Microprobe data and X-ray diffraction analyses show that the alteration mineral assemblage consists primarily of saponite, with minor celadonite, and carbonate. Thermodynamic modeling and terrestrial volcanic analogues were used to demonstrate that these clay minerals formed at temperatures between 130°C and 200°C. By comparing the Lonar alteration assemblage with alteration at other terrestrial craters, we conclude that the Lonar crater represents a lower size limit for impact-induced hydrothermal activity. Based on these results, we suggest that similarly sized craters on Mars have the potential to form hydrothermal systems, as long as liquid water was present on or near the martian surface. Furthermore, the Fe-rich alteration minerals produced by post-impact hydrothermal processes could contribute to the minor iron enrichment associated with the formation of the martian soil.

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“…The source(s) of this carbon has not been estab- The thermal energy deposited in an impact structure as shock heating and impact-melt formation can produce hydrothermal activity and related ore deposits similar to those that result from more conventional geological processes. Such postimpact activity is frequently expressed in the secondary alteration of the impact melts themselves (Dence, 1971;Newsom et al, 1986;McCarville and Crossey, 1996). However, in larger structures, the combination of large volumes of melt and extensive hydrothermal circulation may produce new sedimentary deposits and associated ore bodies, e.g., the Vermillion Formation at Sudbury (Canada) (Grieve and Masaitis, 1994).…”

Section: Distal Impact Ejectamentioning

confidence: 99%

Traces of catastrophe: a handbook of shock-metamorphic effects in terrestrial meteorite impact structures

French

1999

Choice Reviews Online

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Post-impact hydrothermal alteration of the Manson impact structure

Cited by 70 publications

References 19 publications

Post‐impact alteration of surficial suevites in Ries crater, Germany: Hydrothermal modification or weathering processes?

Post‐impact alteration of surficial suevites in Ries crater, Germany: Hydrothermal modification or weathering processes?

Hydrothermal alteration at the Lonar Lake impact structure, India: Implications for impact cratering on Mars

Traces of catastrophe: a handbook of shock-metamorphic effects in terrestrial meteorite impact structures

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