Dating of a regional hydrothermal system induced by the 1850 Ma Sudbury impact event

Ames, D E; Watkinson, David H.; Parrish, R. R.

doi:10.1130/0091-7613(1998)026<0447:doarhs>2.3.co;2

Cited by 124 publications

(129 citation statements)

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“…Hydrothermal effects may have resulted in formation/ destruction of magnetic minerals and changes in grain size and domain state of magnetic carriers. Hydrothermal activity has been documented in impact craters (e.g., Allen et al 1982;Ames et al 1998;Gibson et al 1998). Detailed observations on magnetic mineralogy and hydrothermal minerals in the breccias are needed for interpretation of the paleomagnetic data.…”

Section: Discussionmentioning

confidence: 99%

“…Thus, it follows that the cooling time for the Chicxulub melt sheet might have been relatively short, on the order of less than 250-300 kyr. A cooling time of about 1 Ma has been proposed for the Sudbury crater, assuming a 2.5 km-thick melt sheet and pure conduction for heat loss (Ames et al 1998). However, heat transfer by convection may significantly reduce cooling time estimates, and Pilkington and Hildebrand (2000) interpret concentric patterns in the aeromagnetic anomaly as shallow regions with ferromagnetic minerals deposited by hydrothermal fluids in fault/fracture radial systems.…”

Section: Discussionmentioning

confidence: 99%

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Paleomagnetic and rock magnetic study of the Yaxcopoil‐1 impact breccia sequence, Chicxulub impact crater (Mexico)

Urrutia‐Fucugauchi

Soler-Arechalde

Rebolledo-Vieyra

et al. 2004

Meteorit & Planetary Scien

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Abstract-Results of a detailed paleomagnetic and rock magnetic study of samples of the impact breccia sequence cored in the Yaxcopoil-1 (Yax-1) borehole between about 800 m and 896 m are presented. The Yax-1 breccia sequence occurs from 794.63 m to 894.94 m and consists of redeposited melt-rich, clast-size sorted, fine-grained suevites; melt-rich, no clast-size sorting, medium-grained suevites; coarse suevitic melt agglomerates; coarse melt-rich heterogeneous suevites; brecciated suevites; and coarse carbonate and silicate melt suevites. The low-field susceptibility ranges from −0.3 to 4018 × 10 −6 SI, and the NRM intensity ranges from 0.02 mA/m up to 37510 mA/m. In general, the NRM intensity and magnetic susceptibility present wide ranges and are positively correlated, pointing to varying magnetic mineral contents and textures of the melt-rich breccia sequence. The vectorial composition and magnetic stability of NRM were investigated by both stepwise alternating field and thermal demagnetization. In most cases, characteristic single component magnetizations are observed. Both upward and downward inclinations are present through the sequence, and we interpret the reverse magnetization as the primary component in the breccias. Both the clasts and matrix forming the breccia appear to have been subjected to a wide range of temperature/pressure conditions and show distinct rock magnetic properties. An extended interval of remanence acquisition and secondary partial or total remagnetization may explain the paleomagnetic results.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Paleomagnetic and rock magnetic study of the Yaxcopoil‐1 impact breccia sequence, Chicxulub impact crater (Mexico)

Urrutia‐Fucugauchi

Soler-Arechalde

Rebolledo-Vieyra

et al. 2004

Meteorit & Planetary Scien

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“…Hydrothermal systems are known to precipitate metal sulphides; these minerals have been found in over 25 impact craters (Naumov 2005). The hydrothermal deposition of vast quantities of economically important metal-rich minerals in large impact structures such as Sudbury crater, Canada (iron-nickel ore; Ames et al 1998) and Vredefort crater, South Africa (gold ore; Grieve & Masaitis 1994; table 1) attests to the role of impacts in the generation of minerals with significance for prebiotic reactions, and the correlation between crater size and quantity of minerals deposited. Large impacts on early Earth would have favoured mobilization of metal sulphides.…”

Section: Craters and The Origin Of Lifementioning

confidence: 99%

The origin and emergence of life under impact bombardment

Cockell

2006

Phil. Trans. R. Soc. B

101

104

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Craters formed by asteroids and comets offer a number of possibilities as sites for prebiotic chemistry, and they invite a literal application of Darwin's 'warm little pond'. Some of these attributes, such as prolonged circulation of heated water, are found in deep-ocean hydrothermal vent systems, previously proposed as sites for prebiotic chemistry. However, impact craters host important characteristics in a single location, which include the formation of diverse metal sulphides, clays and zeolites as secondary hydrothermal minerals (which can act as templates or catalysts for prebiotic syntheses), fracturing of rock during impact (creating a large surface area for reactions), the delivery of iron in the case of the impact of iron-containing meteorites (which might itself act as a substrate for prebiotic reactions), diverse impact energies resulting in different rates of hydrothermal cooling and thus organic syntheses, and the indiscriminate nature of impacts into every available lithologygenerating large numbers of 'experiments' in the origin of life. Following the evolution of life, craters provide cryptoendolithic and chasmoendolithic habitats, particularly in non-sedimentary lithologies, where limited pore space would otherwise restrict colonization. In impact melt sheets, shattered, mixed rocks ultimately provided diverse geochemical gradients, which in present-day craters support the growth of microbial communities.

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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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Dating of a regional hydrothermal system induced by the 1850 Ma Sudbury impact event

Cited by 124 publications

References 0 publications

Paleomagnetic and rock magnetic study of the Yaxcopoil‐1 impact breccia sequence, Chicxulub impact crater (Mexico)

Paleomagnetic and rock magnetic study of the Yaxcopoil‐1 impact breccia sequence, Chicxulub impact crater (Mexico)

The origin and emergence of life under impact bombardment

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

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