Origins of mineral matter in peat marsh and peat bog deposits, Spain

López-Buendía, Ángel M.; Whateley, M. K. G.; Bastida, J.; Urquiola, M.M.

doi:10.1016/j.coal.2006.09.001

Cited by 49 publications

(22 citation statements)

References 38 publications

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“…Much of the S can also occur in association with organic matter, reflecting the uptake of SO 4 2− from seawater (Dominik and Stanley, 1993;Chagué-Goff et al, 2002). Halite has been reported at the surface of salt marshes and its formation attributed to evaporation at the marsh surface and oversaturation of Na and Cl (e.g., Chagué- Goff et al, 2001;López-Buendía et al, 2007). The absence of halite in underlying layers was attributed to dissolution as a result of flushing or capillary action (Chagué- Goff et al, 2001), although evidence of biogenic halite in association with halophytic plants has been reported and can explain its low mobility over periods over several thousand years (López-Buendia et al, 2007).…”

Section: Chemical Signatures To Help Identify Palaeotsunami Depositsmentioning

confidence: 98%

Chemical signatures of palaeotsunamis: A forgotten proxy?

Chagué‐Goff

2010

Marine Geology

142

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Section: Chemical Signatures To Help Identify Palaeotsunami Depositsmentioning

confidence: 98%

Chemical signatures of palaeotsunamis: A forgotten proxy?

Chagué‐Goff

2010

Marine Geology

142

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“…These phases affect the elemental composition of bulk peat but do not typically give reflections in XRD analysis due to low crystallinity (Moore and Reynolds 1997). To date a limited number of studies have applied XRD analysis to peat samples and those undertaken were conducted on either untreated peat (e.g., Lopéz-Buendía et al 2007;Smieja-Król et al 2010) or on the ash residue after combustion at 550°C (Le Roux and Shotyk 2006).…”

Section: Introductionmentioning

confidence: 99%

Procedure for Organic Matter Removal from Peat Samples for XRD Mineral Analysis

et al. 2018

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Ombrotrophic peatlands are recognized archives of past atmospheric mineral dust deposition. Net dust deposition rates, grain size, mineral hosts and source areas are typically inferred from down-core elemental data. Although elemental analysis can be time efficient and data rich, there are some inherent limitations. X-ray diffraction (XRD) analysis allows direct identification of mineral phases in environmental samples but few studies have applied this method to peat samples and a well-developed protocol for extracting the inorganic fraction of highly organic samples (>95%) is lacking. We tested and compared different levels of pretreatment: no pre-treatment, thermal combustion (300, 350, 400, 450, 500 and 550°C) and chemical oxidation (H 2 O 2 and Na 2 S 2 O 8 ) using a homogenised highly organic (>98%) composite peat sample. Subsequently, minerals were identified by XRD. The results show that combustion is preferred to chemical oxidation because it most efficiently removes organic matter (OM), an important pre-requisite for identifying mineral phases by XRD analysis. Thermally induced phase transitions can be anticipated when temperature is the only factor to take into consideration. Based on the data required in this study the recommended combustion temperature is 500°C which efficiently removes OM while preserving a majority of common dust minerals.

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“…Interestingly, within the same level, Kołaczek et al (2010) found the highest degree of peat decomposition (see also Figure 6). The higher peat decomposition correlates with higher bulk density and decreases in C/N ratio to 30-50, indicating enhanced degradation of plant litter as well as allogenic mineral matter input to peat bogs (Chagué-Goff and Fyfe 1996;López-Buendia et al 2007). The paradox of doubled organic matter content and increased peat accumulation rates in experimentally drained peatlands was described by Turetsky et al (2011).…”

Section: ) High-resolution Age-depth Model Of a Peat Bog In Polandmentioning

confidence: 99%

High-Resolution Age-Depth Model of a Peat Bog in Poland as an Important Basis for Paleoenvironmental Studies

et al. 2014

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ABSTRACT. This article focuses on constructing a high-resolution age-depth model for the Puścizna Mała peat bog located in Orawa-Nowy Targ Basin (S Poland). The chronology was established on the basis of both 210 Pb and 14 C measurements, and further confirmed by pollen diagrams and the peat bulk composition (density, ash content, and measurements of C, N, S). The 137 Cs profile revealed significant downward migration of this radionuclide and was not suitable for geochronological interpretation. The peat profile in southern Poland records almost 2000 yr of paleoecological and geochemical changes. Major historical events linked to anthropogenic and climatic changes are recorded in the investigated proxies, which confirm the reliability of the age-depth model. Specifically, the Roman period, Migration period, Medieval times, as well as the Industrial Revolution are reflected in the palynology and bulk composition of the peat. However, dating results obtained for the core segment between 22-45 cm are problematic when confronted with other analyses. The highest peat accumulation rate of 2 mm yr -1 (AD 1300-1400 according to the age-depth model) is not compatible with the section of the highest peat decomposition revealed by lithological description. Moreover, the onset of a drastic decline of forests reflected in the palynological data and dated to AD 1280-1340 (40 cm) is difficult to explain in the light of historical data. Therefore, the lithology, bulk density, and pollen were used to validate the obtained age-depth model. External forcing factors on the peat formation process may be indicated, including agricultural activity, water-level fluctuations, and natural climatic factors, which paradoxically caused doubling of the obtained peat accumulation rate.

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Origins of mineral matter in peat marsh and peat bog deposits, Spain

Cited by 49 publications

References 38 publications

Chemical signatures of palaeotsunamis: A forgotten proxy?

Chemical signatures of palaeotsunamis: A forgotten proxy?

Procedure for Organic Matter Removal from Peat Samples for XRD Mineral Analysis

High-Resolution Age-Depth Model of a Peat Bog in Poland as an Important Basis for Paleoenvironmental Studies

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