Influence of palaeoweathering on trace metal concentrations and environmental proxies in black shales

Marynowski, Leszek; Pisarzowska, Agnieszka; Derkowski, Arkadiusz; Rakociński, Michał; Szaniawski, Rafał; Środoń, Jan; Cohen, A. S.

doi:10.1016/j.palaeo.2017.02.023

Cited by 49 publications

(32 citation statements)

References 112 publications

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“…Mo con cen tra tion, which (next to U) has been re ported as the most im por tant in di ca tor in dis tin guish ing oxic, suboxic and anoxic fa cies Algeo and Rowe, 2012;Marynowski et al, 2017), shows sig nif i cant vari abil ity in the sam ples from the Dunbarella ho ri zon. The EF Mo val ues range from 0.17 to 20.93 (Ta ble 1), but high Mo con cen tra tions were ob served only in the sam ples from the lower part of the ho ri zon in the Kopina 1 bore hole (sam ples K2, K3 and K4) and from the mid dle part of the ho ri zon in the Kulik bore hole (sam ple Q15), sug gest ing ox y gen-de pleted sed i men tary fa cies.…”

Section: Redox-sensitive Trace Elementmentioning

confidence: 97%

Geochemical and faunal proxies in the Westphalian A (Langsettian) marine horizon of the Lublin Coal Basin

Krzeszowska

2017

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Krzeszowska, E., 2017. Geo chem i cal and fau nal prox ies in the Westphalian A (Langsettian) ma rine ho ri zon of the Lublin Coal Ba sin. Geo log i cal Quar terly, 61 (4): 751-764, doi: 10.7306/gq.1374The up per most Westphalian ma rine ho ri zon (Dunbarella ho ri zon) is es pe cially im por tant for cor re la tion of Car bon if er ous depos its in the Lublin Coal Ba sin and in other bas ins of the North west Eu ro pean Car bon if er ous Ba sin. The Dunbarella ho ri zon is char ac ter ized by cy clic sed i men ta tion and con se quent fau nal spec trum vari abil ity, typ i cal for Westphalian ma rine ho ri zons of north west ern Eu rope. Palaeontological study of the Dunbarella ho ri zon showed the pres ence of macrofauna rep re sent ing dif fer ent palaeoenvironments, from ma rine to brack ish (non-ma rine) and fresh wa ter con di tions. The ver ti cal sea level fluc tua tions and changes in sea wa ter sa lin ity re sult ing in palaeontological re cord changes do not link with geo chem i cal prox ies. TOC, re dox-sen si tive trace el e ment con cen tra tions, and V/Cr, Ni/Co and V/(V + Ni) ra tios gen er ally sug gest that the Dunbarella ho ri zon sed i ments were de pos ited un der pre dom i nantly oxic con di tions (with lo cal ex cep tions dur ing the ini tial phase of the Dunbarella ingression; Kopina 1 bore hole).

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Section: Redox-sensitive Trace Elementmentioning

confidence: 97%

Geochemical and faunal proxies in the Westphalian A (Langsettian) marine horizon of the Lublin Coal Basin

Krzeszowska

2017

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“…Two distinctively different black shale horizons occur in the outcropped sequence: a 10 cm thick Tournaisian (~359-347 Ma) bed and a 100 cm thick late Fammenian (~372-359 Ma) Hangenberg shale. These shales, deposited under diverse (dysoxic vs. anoxic/euxinic, respectively) palaeoenvironmental conditions, are characterised by different organic matter (OM) contents and composition as well as different geochemical redox-sensitive element signatures (Marynowski et al, 2012(Marynowski et al, , 2017. Based on the Rock-Eval pyrolysis data on the unweathered rocks, the bottom layer of the Hangenberg shale contains organic matter of marine origin (type II kerogen), whereas the Tournaisian shale is a mixed type II-III, as also manifested by the occurrence of an assemblage of marine and terrestrial biomarkers (Marynowski et al, 2011(Marynowski et al, , 2012.…”

Section: Geological Settingmentioning

confidence: 99%

“…The extent of binding is likely to be dependent on the concentration of carboxyl groups. In the present paper we test this hypothesis, using two neighbouring but diverse black shales from the Devonian/Carboniferous boundary which were weathered obliquely to the bedding in the late Permian (Marynowski et al, 2011(Marynowski et al, , 2017. The unique, well-developed and wellpreserved palaeoweathering profile in the Kowala quarry (Poland) is detached from the influence of recent soil formation (weathering, pedogenesis), which is known to be a sink for metal cations (Senesi and Calderoni, 1988;Ahmad et al, 2014).…”

Section: Introductionmentioning

confidence: 95%

“…The same groups are responsible for the elevated cation T 2006). Oxygen functional groups are formed in both artificially oxidised (under laboratory conditions) and naturally weathered black shale (Landais et al, 1991;Faure et al, 1999;Petsch et al, 2000;Georgiev et al, 2012), and a role has been suggested for them in the transport and accumulation of transition metals (Kawamura and Kaplan, 1987;Marynowski et al, 2017). Weathering of OM-rich rocks, however, does not always result in the depletion of heavy metals.…”

Section: Introductionmentioning

confidence: 99%

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Binding of heavy metals by oxidised kerogen in (palaeo)weathered black shales

Derkowski

Marynowski

2018

Chemical Geology

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Citation style: Derkowski Arkadiusz, Marynowski Leszek. (2018). Binding of heavy metals by oxidised kerogen in (palaeo)weathered black shales. A B S T R A C TSub-aerial weathering of black shales drives the gradual leaching of sulphur-and organic-bound heavy metal elements, which are usually abundant in these rocks due to depositional conditions. The formation of oxygen functional groups in kerogen, however, can lead to an opposing mechanism -metal adsorption and binding, similar to a process common in soils. An increase in cation exchange capacity (CEC) measured previously using metal complexes on black shales oxidised under laboratory conditions implies that the same phenomenon may occur in a naturally oxidised black shale. This idea was tested on a unique, well-developed and -preserved Permian palaeoweathering profile containing two neighbouring but diverse black shales from the Devonian/ Carboniferous boundary in the Holy Cross Mountains (Poland).In the studied black shale beds, the oxygen groups formed in kerogen in the partially-weathered zone were found to be responsible for significant changes in adsorption properties measured using hexamminecobalt(III) and Cu(II)-triethylenetetramine cations, which are common probes for CEC. Compared to a pristine part of black shales, the partially weathered zone was depleted of total organic carbon (TOC), sulphur, and sulphur-and organic-bound metals, and highly enriched in Cu, which is generally present in low levels in the nascent shales.In the partially weathered zone, where TOC content is reduced, apparent CEC values surpass the CECs predicted from the contents and structures of clay minerals, and correlate linearly with the content of oxygen groups developed during weathering. The adsorption properties of carboxyl groups in the oxidised kerogen are suggested as being responsible for the syn-or post-weathering enrichment in Cu caused by the remobilisation of older Cu-sulphide ores present in the area. As opposed to natural weathering, aggressive oxidation, e.g. under laboratory conditions produces a high proportion of cross-linked oxygen groups that do not participate in metal cation adsorption. The CEC values of artificially oxidised samples reached a limit corresponding to those of naturally oxidised shales.Editor: Michael E. Böttcher exchange capacity (CEC) of soils (Parfitt et al., 1995;Kaiser et al., 2008;Rengasamy and Churchman, 1999) and oxidised low-rank coals (Skodras et al., 2014). In extreme cases, it is the oxidised black carbon formed via incomplete combustion of vegetation or fossil fuels that is responsible for high CEC levels in soils (Liang et al., 2006;Cheng et al., https://doi.

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“…The upper part of the quarry cuts through Early Carboniferous (earliest Tournaisian) shales, marls and marly shales that are unconformably overlain by Permian conglomerates (see Marynowski et al . , ). Late Devonian deposits within Kowala quarry were divided into several informal lithological units (from A to M; Racki & Szulczewski ; see also Berkowski ; De Vleeschouwer et al .…”

Section: Geological and Palaeoenvironmental Settingmentioning

confidence: 99%

Phyllocarid crustaceans from the Late Devonian of the Kowala quarry (Holy Cross Mountains, central Poland)

Broda

Collette

Budil

2017

Papers in Palaeontology

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Phyllocarida (Crustacea, Malacostraca) are among the most diversified and widespread Late Devonian arthropods. Although previous studies mention phyllocarid fossils from Late Devonian (Frasnian and Famennian) deposits of the Holy Cross Mountains of south‐central Poland, phyllocarids from the Kowala quarry have not been systematically described. Two new species are described from Kowala strata: Echinocaris bisulcata sp. nov. characterized by oval carapace valves with a short hinge line, cone‐like tubercules on the carapace anterior lobe, two pronounced lateral sulci (ventral and median) and two pairs of short spines on every abdominal segment; and Montecaris marynowskii sp. nov. characterized by two pairs of robust abdominal spines, a telson that is shorter than furcal rami, distal parts of which are parallel to the telson, and a body length approximately four times longer than the telson length. Additionally, an isolated furca identified as Dithyrocaris sp. is described herein. Damage observed in the holotype specimen of Montecaris marynowski sp. nov. is consistent with a healed injury, possibly caused by predatory fish. Notes concerning the global occurrences of montecaridids, echinocaridids and the genus Dithyrocaris in the Late Devonian are also provided.

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Influence of palaeoweathering on trace metal concentrations and environmental proxies in black shales

Abstract: The Open University's repository of research publications and other research outputs Influence of palaeoweathering on trace metal concentrations and environmental proxies in black shales

Cited by 49 publications

References 112 publications

Geochemical and faunal proxies in the Westphalian A (Langsettian) marine horizon of the Lublin Coal Basin

Geochemical and faunal proxies in the Westphalian A (Langsettian) marine horizon of the Lublin Coal Basin

Binding of heavy metals by oxidised kerogen in (palaeo)weathered black shales

Phyllocarid crustaceans from the Late Devonian of the Kowala quarry (Holy Cross Mountains, central Poland)

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