Insights into a million-year-scale Rhenohercynian carbonate platform evolution through a multi-disciplinary approach: example of a Givetian carbonate record from Belgium

Pas, Damien; Silva, Anne‐Christine Da; Devleeschouwer, Xavier; Vleeschouwer, David De; Cornet, Pierre; Labaye, Corentin; Boulvain, Frédéric

doi:10.1017/s0016756816000261

Cited by 10 publications

(28 citation statements)

References 61 publications

(107 reference statements)

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“…In this study, a more likely explanation for the P16 antiphase relation in Mg, Sr and Ba is the incongruent dissolution of dolomite (CaMg(CO3)2; IDD), taking place during annual periods that are characterized by enhanced water-rock interaction. The presence of dolomite within lateral-equivalent Givetian limestone deposits in Belgium has been recognised by Pas et al (2016). Dolomitized parts of the limestone host-rock were observed within the nearby Père-Noël Cave (Fairchild et al, 2001).…”

Section: Magnesium Strontium and Barium Proxiesmentioning

confidence: 98%

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Reconstructing seasonality through stable isotope and trace element analysis of the Proserpine stalagmite, Han-sur-Lesse Cave, Belgium: indications for climate-driven changes during the last 400 years

Vansteenberge¹,

Winter²,

Sinnesael³

et al. 2019

Preprint

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Abstract. Annually laminated speleothems allow the reconstruction of paleoclimate down to a seasonal scale. In this study, an annually laminated stalagmite from the Han-sur-Lesse Cave (Belgium) is used to study the expression of the seasonal cycle in northwestern Europe during the Little Ice Age. More specifically, two historical 12-year-long growth periods (ca. 1593–1605 CE and 1635–1646 CE) and one modern growth period (1960–2010 CE) are analysed on a sub-annual scale for their stable isotope ratios (δ13C and δ18O) and trace element (Mg, Sr, Ba, Zn, Y, Pb, U) content. Seasonal variability in the proxies is confirmed with frequency analysis. Zn, Y and Pb show distinct annual peaks in all three investigated periods related to annual flushing of the soil during winter. A strong seasonal in phase relationship between Mg, Sr and Ba in the modern growth period reflects a substantial influence of prior calcite precipitation (PCP). In particular, PCP occurs during summers when recharge of the epikarst is low. This is also evidenced by earlier observations of increased δ13C values during summer. In the 17th century intervals, there is a distinct antiphase relationship between Mg, Sr and Ba, suggesting that varying degrees of incongruent dissolution of dolomite control the observed seasonal variations. The processes controlling seasonal variations in Mg, Sr and Ba in the speleothem appear to change between the 17th century and 1960–2010 CE. The Zn, Y, Pb and U concentration profiles, stable isotope ratios and morphology of the speleothem laminae all point towards increased seasonal amplitude in cave hydrology and higher drip water discharge during the 17th century. These observations reflect an increase in water excess above the cave and recharge of the epikarst, due to a combination of lower summer temperatures and increased winter precipitation during the 17th century. This study indicates that the transfer function controlling Mg, Sr and Ba seasonal variability varies over time. Which process is dominant, either PCP or dolomite dissolution, is clearly climate-driven and can thus be used as a paleoclimate proxy itself.

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Section: Magnesium Strontium and Barium Proxiesmentioning

confidence: 98%

“…Within the Mont-d'Haurs Fm., the biostromal limestones are alternated with fine-grained micritic limestones and dolomitic shales (Preat and Bultynck, 2006). Additionally, a recent study by Pas et al (2016) on Middle Devonian outcrops has shown that dolomitized beds also occur within the limestones of the Fromelennes Fm.…”

Section: Han-sur-lesse Cavementioning

confidence: 99%

Reconstructing seasonality through stable isotope and trace element analysis of the Proserpine stalagmite, Han-sur-Lesse Cave, Belgium: indications for climate-driven changes during the last 400 years

Vansteenberge¹,

Winter²,

Sinnesael³

et al. 2019

Preprint

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“…The second case study consists of the 184 m thick continuous early Givetian to early Frasnian sequence of the La Thure section (∼ 383-380 Ma, Middle-Late Devonian; De Vleeschouwer and Parnell, 2014;De Vleeschouwer et al, 2015;Pas et al, 2016). The Givetian sequence is composed of bedded limestone, mainly deposited in a shallow-water rimmed shelf characterised by a large set of internal and external rimmed-shelf environments (Pas et al, 2016).…”

Section: The Geological Datasetsmentioning

confidence: 99%

“…The Givetian sequence is composed of bedded limestone, mainly deposited in a shallow-water rimmed shelf characterised by a large set of internal and external rimmed-shelf environments (Pas et al, 2016). The overlying early Frasnian sequence is dominated by shale deposited in a siliciclastic drowned platform .…”

Section: The Geological Datasetsmentioning

confidence: 99%

Testing the impact of stratigraphic uncertainty on spectral analyses of sedimentary series

et al. 2016

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Abstract. Spectral analysis is a key tool for identifying periodic patterns in sedimentary sequences, including astronomically related orbital signals. While most spectral analysis methods require equally spaced samples, this condition is rarely achieved either in the field or when sampling sediment core. Here, we propose a method to assess the impact of the uncertainty or error made in the measurement of the sample stratigraphic position on the resulting power spectra. We apply a Monte Carlo procedure to randomise the sample steps of depth series using a gamma distribution. Such a distribution preserves the stratigraphic order of samples and allows controlling the average and the variance of the distribution of sample distances after randomisation. We apply the Monte Carlo procedure on two geological datasets and find that gamma distribution of sample distances completely smooths the spectrum at high frequencies and decreases the power and significance levels of the spectral peaks in an important proportion of the spectrum. At 5 % of stratigraphic uncertainty, a small portion of the spectrum is completely smoothed. Taking at least three samples per thinnest cycle of interest should allow this cycle to be still observed in the spectrum, while taking at least four samples per thinnest cycle of interest should allow its significance levels to be preserved in the spectrum. At 10 and 15 % uncertainty, these thresholds increase, and taking at least four samples per thinnest cycle of interest should allow the targeted cycles to be still observed in the spectrum. In addition, taking at least 10 samples per thinnest cycle of interest should allow their significance levels to be preserved. For robust applications of the power spectrum in further studies, we suggest providing a strong control of the measurement of the sample position. A density of 10 samples per putative precession cycle is a safe sampling density for preserving spectral power and significance level in the Milankovitch band. For lower sampling density, the use of gamma-law simulations should help in assessing the impact of stratigraphic uncertainty in the power spectrum in the Milankovitch band. Gamma-law simulations can also model the distortions of the Milankovitch record in sedimentary series due to variations in the sedimentation rate.

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“…In this study, multiple proxies, such as sedimentology, geochemistry and hysteresis magnetic measurements are generated from the million year Fromelennes-Flohimont section in France (southern margin of the Ardennes platform). These data are then integrated with previously published data from the northern margin of the Ardennes platform [La Thure (LT) section] which include facies, geochemistry (Pas et al, 2017) and magnetic susceptibility analyses (De Vleeschouwer et al, 2015). This synthesis sheds new light on the depositional environments, their variations across the platform and the main sea-level fluctuations from the earliest to the latest Givetian time.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Susceptibility Record in Paleozoic Succession (Rhenohercynian Massif, Northern Europe) – Disentangling Sea Level, Local and Diagenetic Impact on the Magnetic Records

Pas

Silva

Poulain³

et al. 2019

Front. Earth Sci.

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This study uses an integrated approach, including sedimentology, geochemistry and hysteresis magnetic measurements on a million year Givetian sequence in the southern margin of the Ardennes carbonate platform (France) to test the reliability of magnetic susceptibility (χ) records as interregional correlation tools in remagnetized settings. Furthermore, we aim to better understand the N-S depositional variations and sea-level fluctuations in the Ardennes. Sedimentological analyses revealed a complex platform evolution displaying a variety of shallow-and off-reef paleoenvironmental rocks, which ultimately allowed us to improve the sedimentological model of this area and to constrain the main sea-level fluctuations within the southern margin of the Ardennes platform. Comparison of the χ curve of this succession with previously published time-equivalent records in the western margin of the platform indicates a clear correlation between the two areas, despite the distance between the locales, their different sedimentology background and the remagnetization affecting the entire region. In contrast, the comparison of these χ profiles from the Ardennes (SW Rhenohercynian Massif, Belgian and France) with coeval data from the Rheinisches Schiefergebirge (NE Rhenohercynian Massif, Germany) do not show obvious correlations. Therefore, it is inferred that synsedimentary autogenic processes (e.g., vicinity to landmasses, wave agitation), which operate at small spatial and temporal scales affected the χ signal and could cause the lack of correlation between χ profiles.

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Insights into a million-year-scale Rhenohercynian carbonate platform evolution through a multi-disciplinary approach: example of a Givetian carbonate record from Belgium

Cited by 10 publications

References 61 publications

Reconstructing seasonality through stable isotope and trace element analysis of the Proserpine stalagmite, Han-sur-Lesse Cave, Belgium: indications for climate-driven changes during the last 400 years

Reconstructing seasonality through stable isotope and trace element analysis of the Proserpine stalagmite, Han-sur-Lesse Cave, Belgium: indications for climate-driven changes during the last 400 years

Testing the impact of stratigraphic uncertainty on spectral analyses of sedimentary series

Magnetic Susceptibility Record in Paleozoic Succession (Rhenohercynian Massif, Northern Europe) – Disentangling Sea Level, Local and Diagenetic Impact on the Magnetic Records

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