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

Arp, Gernot; Kolepka, Claudia; Simon, Klaus; Karius, Volker; Nolte, Nicole; Hansen, Bent

doi:10.1111/maps.12235

Cited by 31 publications

(71 citation statements)

References 95 publications

(227 reference statements)

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“…2), but also in relation to strong physicochemical and biological gradients along flow paths (cooling/heating, evaporation, CO 2 degassing -or ingassing, respiration or photosynthesis) ( Fig. 8; Fouke et al, 2000;Pache et al, 2001;Andrews, 2006;Fairchild et al, 2006;Alonso-Zarza and Tanner, 2010b;Kele et al, 2011;Arp et al, 2013b;Frantz et al, 2014;Rogerson et al, 2017). The oxygen isotopic composition of carbonate minerals is controlled by the δ…”

Section: Mechanical Weatheringmentioning

confidence: 99%

“…Transmission Electron Microscopy (TEM) observations by Frisia et al (2002) furthermore suggest that physical crystal defects such as twins, dislocations and surface irregularities in the aragonite can have a control on the location and kinetics of the neomorphic process. Geochemical data (Arp et al, 2013b;Domínguez-Villar et al, 2017) have been used to support hypotheses of partially open systems, with the neomorphic process occurring both along an angstrom-thin dissolution-re-precipitation fluid film and within the larger, intercrystalline pores in exchange with bulk fluid (Arp et al, 2013b).…”

Section: Neomorphismmentioning

confidence: 99%

“…They consist of composite, blocky, platy or spar calcite crystal ( Fig. 5B; Chafetz and Guidry, 2003;Turner and Jones, 2005;Rainey and Jones, 2007;Jones and Renaut, 2008;Arp et al, 2013b); columnar, acicular, gothic arch or bladed crystals forming isopachous calcite (Fig. 5C, D) and fibrous aragonite, void lining cements (Chafetz et al, 1994;Arp et al, 1998;Claes et al, 2015), radial splays (Barth and Chafetz, 2015), anhedral, calcite-micrite banded crusts, mosaic cements and overgrowths (Fig.…”

Section: Cementation and Cementsmentioning

confidence: 99%

“…Climate: semi-arid to arid. Deposits: supralitoral carbonate swamps and pedogenic carbonates, spring mounds, eulitoral coated grains, microbialites (including stromatolites) and algal bioherms, speleothems Dissolution, micritisation, shrinkage, neomorphism, replacement, cementation Riding (1979), Arp (1995), Pache et al (2001), Arp et al (2013aArp et al ( , 2013bArp et al ( , 2017 Mono Lake (CA, USA) Pleistocene to Recent, endorheic alkaline lake located in an extensional, active volcanic basin near the Sierra Nevada (T: 1.5-23°C; pH: 9.7-10; salinity: N 90%; Alkalinity: 600-700 meq/L; Mg/Ca: 14). Climate: Mediterranean continental to subarctic.…”

Section: Tablementioning

confidence: 99%

“…O in many non-marine carbonates relates to simultaneous processes of CO 2 degassing, evaporation and cooling of the fluid (Pentecost, 1995;Fouke et al, 2000;Arp et al, 2013b;Della Porta, 2015). For Edipsos hot springs (Greece) and Mammoth Hot Springs (Holocene): personal data; for (sub)tropical soils: no δ…”

mentioning

confidence: 99%

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What do we really know about early diagenesis of non-marine carbonates?

Boever

Brasier

Foubert

et al. 2017

Sedimentary Geology

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Non-marine carbonate rocks including cave, spring, stream, calcrete and lacustrine-palustrine sediments, are susceptible to early diagenetic processes. These can profoundly alter the carbonate fabric and affect paleoclimatic proxies. This review integrates recent insights into diagenesis of non-marine carbonates and in particular the variety of early diagenetic processes, and presents a conceptual framework to address them. With ability to study at smaller and smaller scales, down to nanometers, one can now observe diagenesis taking place the moment initial precipitates have formed, and continuing thereafter. Diagenesis may affect whole rocks, but it typically starts in nano-and micro-environments. The potential for diagenetic alteration depends on the reactivity of the initial precipitate, commonly being metastable phases like vaterite, Ca-oxalates, hydrous Mg-carbonates and aragonite with regard to the ambient fluid. Furthermore, organic compounds commonly play a crucial role in hosting these early transformations. Processes like neomorphism (inversion and recrystallization), cementation and replacement generally result in an overall coarsening of the fabric and homogenization of the wide range of complex, primary microtextures. If early diagenetic modifications are completed in a short time span compared to the (annual to millennial) time scale of interest, then recorded paleoenvironmental signals and trends could still acceptably reflect original, depositional conditions. However, even compact, non-marine carbonate deposits may behave locally and temporarily as open systems to crystal-fluid exchange and overprinting of one or more geochemical proxies is not unexpected. Looking to the future, relatively few studies have examined the behaviour of promising geochemical records, such as clumped isotope thermometry and (non-conventional) stable isotopes, in well-constrained diagenetic settings. Ongoing and future in-vitro and in-situ experimental approaches will help to investigate and detangle sequences of intermediate, diagenetic products, processes and controls, and to quantify rates of early diagenesis, bridging a gap between nanoscale, molecular lab studies and the fossil field rock record of non-marine carbonates.

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Section: Mechanical Weatheringmentioning

confidence: 99%

Section: Neomorphismmentioning

confidence: 99%

Section: Cementation and Cementsmentioning

confidence: 99%

Section: Tablementioning

confidence: 99%

mentioning

confidence: 99%

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What do we really know about early diagenesis of non-marine carbonates?

Boever

Brasier

Foubert

et al. 2017

Sedimentary Geology

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The fate of a travertine record: Impact of early diagenesis on the Y‐10 core (Mammoth Hot Springs, Yellowstone National Park, USA)

Boever

Jaramillo‐Vogel

Bouvier

et al. 2021

The Depositional Record

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Spring systems are efficient and fast precipitating non‐marine carbonate factories, but they are also prone to (early) diagenesis. Evidence of diagenesis in travertines remains controversial as the resulting textures have been considered primary in other deposits and the impact on geochemical/palaeo‐environmental signals is often poorly addressed. This study revisits the Y‐10 core, taken in 1967 at one of the upper terraces of Mammoth Hot Springs in Yellowstone National Park (USA). The travertine depositional facies in the upper 50 m of the core show a general distal to proximal facies trend upwards. To unravel the nature, impact and timing of early diagenesis, fabrics and geochemical signatures are also compared to modern hot spring carbonates. Secondary ion mass spectrometry and detailed microscopy proved powerful in determining the stable isotope signature of different cement generations, thereby detangling the fluid history. Diagenesis starts during spring activity, but these warm waters not only precipitate CaCO3 at the top, they also seem to have circulated through the porous spring fabrics below. It resulted in coarsening and homogenization of the primary textures through neomorphism of aragonite and calcite cementation, often resulting in new intracrystalline microporosity within the calcite crystals. Subsequent circulation of meteoric fluids led to dissolution and cementation, particularly near the top of the core. Careful interpretation of U/Th dates suggests that travertine deposition started at the beginning of the Holocene/end Pleistocene. Calculated depositional (precipitation) rates vary between 2 and 20 mm/year, assuming a constant rate between samples at different depths. Aragonite deposits are completely transformed to calcite below depths of 5–10 m, corresponding to a time span of 4,000 years. Core and petrography observations, together with dating, suggest that travertine strata below marine sandstones in the lower part of the core may relate to fault displacement after the onset of travertine deposition.

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