Magnetic Susceptibility, Biostratigraphy, and Sequence Stratigraphy: Insights Into Devonian Carbonate Platform Development and Basin Infilling, Western Alberta, Canada

Whalen, Michael T.; Day, Jed

doi:10.2110/pec.08.89.0291

Cited by 30 publications

(67 citation statements)

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“…In recent years, a growing number of studies have focused on the use of the magnetic susceptibility (MS) signal as a marker of stratigraphic cycles and paleoenvironmental changes in Paleozoic carbonate rocks (Ellwood et al 1999;Crick et al 2002;Averbuch et al 2005;Hladil et al 2005;Da Silva and Boulvain 2006;Riquier et al 2007;Mabille and Boulvain 2007;Whalen and Day 2008). In these studies, variations in MS have been largely shown to relate to sedimentary facies evolution (Ellwood et al 1999; da Silva and Boulvain 2006;Whalen and Day 2008) and possibly to correlate over long distances within an individual basin or even on the margins of different oceanic realms Ellwood et al 2001).…”

Section: Introductionmentioning

confidence: 99%

Diagenetic versus detrital origin of the magnetic susceptibility variations in some carbonate Frasnian–Famennian boundary sections from Northern Africa and Western Europe: implications for paleoenvironmental reconstructions

Riquier

Averbuch

Devleeschouwer

et al. 2009

Int J Earth Sci (Geol Rundsch)

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To provide a new insight into the diagenetic versus detrital origin of the magnetic susceptibility variations in ancient carbonate sequences, a study was conducted within four Frasnian-Famennian platform carbonate sections from Germany, France and Morocco. The study includes along-section magnetic susceptibility and carbonate content measurements complemented by analyses of magnetic hysteresis parameters, inorganic geochemistry and clay mineralogy. Our results show that the magnetic susceptibility evolution is dominantly controlled by the variations in the concentration of low-coercivity ferromagnetic magnetite grains and, to a lesser extent, of paramagnetic clays. In more detail, hysteresis ratios suggest the coexistence of two magnetite populations with significantly different grain size: (1) a dominantly coarsegrained detrital fraction including a mixture of multidomain and single-domain particles (2) an authigenic finegrained fraction composed of a mixture of single-domain and superparamagnetic particles. Despite a diagenetic imprint on the clay assemblages, no relationship is established between magnetic susceptibility and illite crystallinity, therefore discarding a noticeable distortion of primary within-section magnetic susceptibility evolution. The overall inherited character of the magnetic susceptibility fluctuations is corroborated by a significant correlation of magnetic susceptibility with terrigenous proxies (Zr, Th). The poorer correlation of magnetic susceptibility with the Fe content is consistent with the existence of a very fine-grained authigenic magnetite component that possibly induces a global magnetic susceptibility increase at the section scale, but no distortion of the within-section evolution. The magnetic susceptibility curves presented here provide a general record of climate-driven detrital influx and carbonate productivity through Frasnian-Lower Famennian times.

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Section: Introductionmentioning

confidence: 99%

Diagenetic versus detrital origin of the magnetic susceptibility variations in some carbonate Frasnian–Famennian boundary sections from Northern Africa and Western Europe: implications for paleoenvironmental reconstructions

Riquier

Averbuch

Devleeschouwer

et al. 2009

Int J Earth Sci (Geol Rundsch)

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“…Correlations can then be established through different techniques: † By visual correlation of MS peaks (Crick et al 1997;Geršl & Hladil 2004;Da Silva & Boulvain 2006;Bábek et al 2010;Boulvain et al 2010;Michel et al 2010;Dechamps et al 2015;Grabowski et al 2015;Mayrhofer & Lukeneder 2015;Whalen et al 2015). † The MS curve can also be included in a sequence stratigraphic framework (Whalen & Day 2008, 2010Da Silva et al 2010). Whalen & Day (2010) demonstrated a predictable pattern of relatively low MS in late transgressive and early highstand facies and higher MS in late highstand, lowstand and early transgressive facies at both the sequence and parasequence level.…”

Section: Application Of Ms As a Correlation Toolmentioning

confidence: 99%

“…This time period was selected because, for the Palaeozoic, it has a relatively robust biostratigraphic framework, allowing an essential control to frame the correlations through MS. Furthermore, an important amount of MS data had already been published on the Mid-Palaeozoic Ellwood et al 2001Ellwood et al , 2007Da Silva & Boulvain 2002, 2003, 2006Hladil 2002;Racki et al 2002;Hladil et al 2003Hladil et al , 2006Geršl & Hladil 2004;Whalen & Day 2008;Da Silva et al 2009b). This permitted insertion of the newly collected material (Devonian from the Czech Republic, China, Carnic Alps and Canada; see Da into an already extensive database.…”

Section: Igcp-580 Project: Application Of Ms As a Palaeo-environmentamentioning

confidence: 99%

Magnetic susceptibility application: a window onto ancient environments and climatic variations: foreword

Silva

Whalen

Hladil

et al. 2015

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Magnetic susceptibility (MS) is a powerful tool, which is being applied increasingly on sedimentary rocks to constrain stratigraphic correlations, or as a palaeo-environmental or palaeoclimatic tool. The origin of the magnetic minerals responsible for the variations in MS can be linked to various phenomena such as detrital inputs, pedogenesis, bacterial precipitation or diagenesis. Therefore, it is critical to improve our knowledge of the origin of the MS signal in order to apply it for correlations or as a proxy. Here, we present a synthesis of the techniques that can be applied to get a better understanding of the origin of the MS signal, through comparison with other palaeo-environmental proxies, through magnetic measurements or through dissolution and direct observation of the extracted minerals. We also propose an overview of the different techniques applied in order to use MS as a correlation tool, and we show various examples of successful applications of MS as a recorder of change in past sea-level and climate. We also present the main results and activities of the IGCP-580 project 'Application of magnetic susceptibility as a palaeoclimatic proxy on Palaeozoic sedimentary rocks and characterization of the magnetic signal'.

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“…Interpretation skills: For this case of pure limestone, the interpretations followed the principles that the MS stratigraphic variation in pure limestones is less related to locally occurring stratal arrangements and cycles than it was assumed for limestones in general (Whalen et al 2000, Whalen & Day 2005, da Silva & Boulvain 2006. The record reflects the overall climatic control of quantity and quality of the delivered atmospheric dust (Hladil et al 2006, da Silva et al 2008, Boulvain et al 2008a.…”

Section: Magnetic Susceptibility (Ms)mentioning

confidence: 99%

Early Middle Frasnian platform reef strata in the Moravian Karst interpreted as recording the atmospheric dust changes: the key to understanding perturbations in the punctata conodont zone

Hladil¹,

Koptíková²,

Galle³

et al. 2009

Bull. Geosci.

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Development of new stratigraphic techniques has led to better understanding of the compositional variability and quantity of dust-related impurity components in pure marine limestones, with a considerable impact on stratigraphic resolution and explanation of causality. The early Middle Frasnian (E-MF, punctata Zone) stratigraphic interval was selected for this study in order to assess the contribution of atmospheric dust and to distinguish between the robust climatically driven anomalies and the potential distant effect of the Alamo impact. The location of the study in the Moravian Karst area has two advantages: there are no mixed carbonate-siliciclastic sediments, only the pure limestone of a platform reef complex, and the authors have access to voluminous survey and drilling reports. The methodology employed for undertaking the most recent research was based on succession and combination of the following steps: biostratigraphy and facies analysis, magnetic susceptibility (MS), gamma-ray spectrometry (GRS), instrumental neutron activation analysis (INAA), and finally, separation and assessment of rare non-carbonate particles. The natural atmospheric dust burden, deposition, and embedding in pure carbonate traps were, most likely, threefold higher during the Frasnian in the Upper Devonian in comparison with Quaternary platform reef counterparts. Variation of 10-100 ka averages is medium in terms of the Frasnian ranges of MS-GRS values, and the base and top of the E-MF interval are manifested by robust elevations of these values. Forced anomalies in MS, GRS and geochemical signals that defy the normal sequence of rhythms were found: two anomalies disturb the broad middle part of the E-MF interval and one is superimposed on the upper part of the punctata-hassi zones strata. The most significant disturbance was found near the mid-punctata Zone level. In spite of the relatively low magnitude, it shows features that are usually related to major environmental crises which occured in the Devonian, such as the Choteč, Kačák or Kellwasser events. These include a large depression in MS and dust-particle concentration values coupled with a period of sea level lowstand and calm atmospheric conditions (stage A), and an abrupt shift to high MS that has a comb-like pattern that gradually fades upward, developed together with a forced flooding surface, increased detritism, and stormy conditions (stage B). It is a reverse of the normal cyclicity in pure limestone when the high impurity corresponds to lowstands. A very small amount of particulate material of an exotic nature was found at the A-B stage interface and assessed: it contained iron-rich silicate microspherules and drops, devitrified glasses, tiny mineral/rock clasts of hyperbasite compositions, as well as pellets and clumps of glasses and phlogopites. The silt-sized particles show ablated and striated surfaces, flow deformation of devitrified glasses, and layered onion-like structures. Iron-rich lamellae with meshwork crystal patterns occur among decrepitated crystalli...

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Magnetic Susceptibility, Biostratigraphy, and Sequence Stratigraphy: Insights Into Devonian Carbonate Platform Development and Basin Infilling, Western Alberta, Canada

Cited by 30 publications

References 0 publications

Diagenetic versus detrital origin of the magnetic susceptibility variations in some carbonate Frasnian–Famennian boundary sections from Northern Africa and Western Europe: implications for paleoenvironmental reconstructions

Diagenetic versus detrital origin of the magnetic susceptibility variations in some carbonate Frasnian–Famennian boundary sections from Northern Africa and Western Europe: implications for paleoenvironmental reconstructions

Magnetic susceptibility application: a window onto ancient environments and climatic variations: foreword

Early Middle Frasnian platform reef strata in the Moravian Karst interpreted as recording the atmospheric dust changes: the key to understanding perturbations in the punctata conodont zone

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