Petrographic investigation of melt and matrix relationships in Chicxulub crater Yaxcopoil-1 brecciated melt rock and melt rock-bearing suevite (846–885m, units 4 and 5)

Nelson, M. J.; Newsom, H. E.; Spilde, M.; Salge, T.

doi:10.1016/j.gca.2012.02.022

Cited by 13 publications

(20 citation statements)

References 53 publications

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“…Indeed, this obliteration of primary signatures is in accordance with the general cooling history of impact‐generated hydrothermal systems, where early high‐temperature phases are commonly overprinted or erased by the later following cooler conditions (e.g., Nelson et al. ). Likewise, a negative Ce anomaly, which is commonly observed in marine carbonates (e.g., Piper ; Hu et al.…”

Section: Discussionsupporting

confidence: 70%

“…; Nelson et al. ). To date, a hydrothermal fluid convection system has, therefore, only been shown for the crater suevite, although craters of similar size exhibit much more extended systems, e.g., the Haughton impact structure (Osinski et al.…”

Section: Discussion: Extent and Duration Of Postimpact Hydrothermal Amentioning

confidence: 98%

“…Indeed, impact‐generated hydrothermal systems differ from magmatism‐related systems by the fact that a single high‐temperature pulse is followed by a longer duration tail of the cooling system (e.g., Nelson et al. ).…”

Section: Introductionmentioning

confidence: 99%

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New evidence for persistent impact‐generated hydrothermal activity in the Miocene Ries impact structure, Germany

Arp

Kolepka

Simon

et al. 2013

Meteorit & Planetary Scien

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Abstract-The extent of impact-generated hydrothermal activity in the 24 km sized Ries impact structure has been controversially discussed. To date, mineralogical and isotopic investigations point to a restriction of hydrothermal activity to the impact-melt bearing breccias, specifically the crater-fill suevite. Here, we present new petrographic, geochemical, and isotopic data of postimpact carbonate deposits, which indicate a hydrothermal activity more extended than previously assumed. Specifically, carbonates of the Erbisberg, a spring mound located upon the inner crystalline ring of the crater, show travertine facies types not seen in any of the previously investigated sublacustrine soda lake spring mounds of the Ries basin. In particular, the streamer carbonates, which result from the encrustation of microbial filaments in subaerial spring effluents between 60 and 70°C, are characteristic of a hydrothermal origin. While much of the primary geochemical and isotopic signatures in the mound carbonates have been obliterated by diagenesis, a postimpact calcite vein from brecciated gneiss of the subsurface crater floor revealed a flat rare earth element pattern with a clear positive Eu anomaly, indicating a hydrothermal fluid convection in the crater basement. Finally, the strontium isotope stratigraphic correlation of the travertine mound with the crater basin succession suggests a hydrothermal activity for about 250,000 yr after the impact, which would be much longer than previously assumed.

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Section: Discussionsupporting

confidence: 70%

Section: Discussion: Extent and Duration Of Postimpact Hydrothermal Amentioning

confidence: 98%

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New evidence for persistent impact‐generated hydrothermal activity in the Miocene Ries impact structure, Germany

Arp

Kolepka

Simon

et al. 2013

Meteorit & Planetary Scien

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“…While detailed petrographic studies at the thin‐section to hand‐sample scale have been conducted on Rochechouart impactites (e.g., Kraut and French ; Lambert , ), the complex relationships between clasts and matrix as well as the nature of the matrix itself can only be fully observed at the micrometer to nanometer scale using scanning electron microscopy (SEM) imaging techniques (e.g., Nelson et al. ; Osinski and Spray ; Osinski et al. ).…”

Section: Introductionmentioning

confidence: 99%

“…Being able to correlate these samples and compare them to samples with a field context is invaluable and fundamental to understanding impact cratering as a geological process occurring not just on Earth but also on other terrestrial bodies. While detailed petrographic studies at the thin-section to hand-sample scale have been conducted on Rochechouart impactites (e.g., Kraut and French 1971;Lambert 1974Lambert , 1977c, the complex relationships between clasts and matrix as well as the nature of the matrix itself can only be fully observed at the micrometer to nanometer scale using scanning electron microscopy (SEM) imaging techniques (e.g., Nelson et al 2012;Osinski and Spray 2001;Osinski et al 2004). We have carried out such a study for the first time on Rochechouart impactites.…”

Section: Introductionmentioning

confidence: 99%

Revisiting the Rochechouart impact structure, France

Sapers

Osinski

Banerjee

et al. 2014

Meteorit & Planetary Scien

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The Rochechouart impact structure, south-central France (45 o 50 0 N, 0 o 46 0 E), is a partly eroded, approximately 200 Myr, complex impact structure. The impactite suite at Rochechouart provides an excellent example of gradational boundaries and transitional lithologies that have been historically difficult to classify with standard impactite nomenclature. Here, we present the first detailed scanning electron microscopy-based description of the Rochechouart impactites integrated with hand-sample and petrographic observations with the goal of understanding the clast-matrix relationships of transitional lithologies. Three main impact-generated hydrothermal alteration assemblages are also recognized: (1) argillic-like, (2) carbonate, and (3) oxide. Our results support the existence of a continuum between clast-rich impact melt rocks and glass-rich clastic breccias (suevites) that must be represented in universal classification schemes. This suite of impactites from the Rochechouart impact structure is used as a test case for a recently published classification scheme based on the nature of the groundmass setting a precedent for classification of impactites with limited to no geological context such as deeply eroded terrestrial impact structures and future sample return missions. The re-evaluation of the melt-bearing Rochechouart impactites questions the currently accepted size of the crater, suggesting a much larger original crater diameter.

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A low-temperature, meteoric water-dominated origin for smectitic clay minerals in the Chicxulub impact crater upper peak ring, as inferred from their oxygen and hydrogen isotope compositions

et al. 2022

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Petrographic investigation of melt and matrix relationships in Chicxulub crater Yaxcopoil-1 brecciated melt rock and melt rock-bearing suevite (846–885m, units 4 and 5)

Cited by 13 publications

References 53 publications

New evidence for persistent impact‐generated hydrothermal activity in the Miocene Ries impact structure, Germany

New evidence for persistent impact‐generated hydrothermal activity in the Miocene Ries impact structure, Germany

Revisiting the Rochechouart impact structure, France

A low-temperature, meteoric water-dominated origin for smectitic clay minerals in the Chicxulub impact crater upper peak ring, as inferred from their oxygen and hydrogen isotope compositions

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