Match!

The magnetostratigraphy of Coniacian-Late Campanian chalk sequences in southern England

Published on Mar 1, 1998in Earth and Planetary Science Letters4.637
· DOI :10.1016/S0012-821X(98)00008-9
Paul Montgomery1
Estimated H-index: 1
(University of Southampton),
Ernie A. Hailwood6
Estimated H-index: 6
(University of Southampton)
+ 1 AuthorsJ. A. Burnett12
Estimated H-index: 12
(UCL: University College London)
Abstract
Results from a detailed palaeomagnetic study of the Late Cretaceous sequences of Culver Cliff and Scratchell's Bay (Isle of Wight) and Seaford Head, East Sussex are presented. The sections range in age from Latest Turonian to early Late Campanian and consist of white chalk with flints. Hand samples and large volume rock cores have been collected. Both thermal and AF demagnetisation have been used to remove magnetic overprints. Measurements have been carried out using a CCL 'discrete sample' and a 2-G 'wholecore' cryogenic magnetometer. Average NRM intensities range between 0.0015 and 1.6008 mA/m. By carrying out repeat measurements on large volume samples, reliable determination of the remanence of such weakly magnetic rock has been possible. A reliability classification scheme is proposed to provide an objective means of assessing the quality of the palaeomagnetic results obtained from thermal and AF demagnetisation. IRM acquisition experiments suggest the presence of single domain and multi-domain titanomagnetite. Mixtures of hematite and titanomagnetite also occur. Magnetic mineral extractions carried out by Dr. M. Hounslow have revealed the presence of detrital titanomagnetite and hematite preserved as inclusions within silicate grains. Moreover, the finest portion of the magnetic extract ("10%) have revealed bacterial magnetite preserved as individual grains and chains. Sample horizons which contain the highest proportion of bacterial magnetite appear to have higher NRM intensities. Geomagnetic polarity zones representing Chrons C33N, C33R and C34N have been located and reliably tied to the macrofossil (Dr. A S. Gale, pers. comm.) and nannofossil (Dr. J.A. Burnett, pers. comm.) biostratigraphic zones in the sections studied. A standard magnetic polarity stratigraphy for the Late Cretaceous is proposed. These studies have thus provided magnetostratigraphic age calibration points of 83.000 and 78.781 Ma (the C34N/C33R and C33R/C33N boundaries of Cande & Kent, 1992) for the English Chalk successions. By constructing a composite magnetostratigraphic section, and by assuming that deposition of the Chalk was relatively constant, a magnetostratigraphic time scale for southern England is proposed and used to calibrate the ^^Sr/^Sr curve of McArthur et al. (1992) and to date Santonian- Campanian chalk-flint cycles. The characteristic rhythmic bedding of the Upper Cretaceous pelagic carbonate sequences of the UK have been interpreted as the result of orbital variations. Though measurement of chalk-flint cycles within the English Chalk have been previously attempted, difficulties in locating and dating Late Cretaceous stage boundaries has proved a major hindrance in such studies. By determining the mean frequency of the chalk-flint cycles, inaccuracies in section and cycle measurement can be minimised, and an 'idealised' number of cycles for the chalk representing Chron C33R calculated. A histogram of the chalk-flint cycle thickness for strata enclosed within a 170 metre thick, reverse polarity magnetozone representing Chron C33R at Scratchell's Bay reveals a mean cycle thickness of 0.7 metres. A duration of 17, 362 years is inferred for chalk-flint cycles which probably represent the quasi-periodic orbital precession cycle (18kyr). By employing the best quality palaeomagnetic data, a palaeopole for southern England, during Coniacian-Late Canipanian times (78-85 Ma), is proposed (Long.=184°E, Lat.=73.0''N). However, though the Q value (van der Voo, 1988) of this palaeopole is low (Q=5) this pole position helps to confirm the palaeomagnetic pole of Heller & Channell (1979) derived from Late Cretaceous limestone (83 Ma) of the Miinster Basin, Germany (Long.=181°E, Lat.=76°N). Thus, during Coniacian-Late Canipanian times southern England lay at a palaeolatitude of 34±7°N.
  • References (30)
  • Citations (43)
📖 Papers frequently viewed together
486 Citations
62 Citations
138 Citations
78% of Scinapse members use related papers. After signing in, all features are FREE.
References30
Newest
#1Kenneth J. Hsü (ETH Zurich)H-Index: 26
88 CitationsSource
#1Andrew S. Gale (Imperial College London)H-Index: 42
#2P. Montgomery (University of Southampton)H-Index: 1
Last. John M. McArthur (UCL: University College London)H-Index: 45
view all 6 authors...
Review of biostratigraphical evidence from different regions shows that criteria used by workers on various marine fossil groups to define the Santonian-Campanian boundary differ considerably in relative age and position. Probably the most widely recognizable of these criteria is the extinction of the distinctive crinoid Marsupites testudinarius (North America, Europe, Asia, north Africa, Australia), which, coincides exactly with two separate definitions of the boundary - appearances of the ammo...
44 CitationsSource
#1Felix M. GradsteinH-Index: 31
#2Frits AgterbergH-Index: 5
Last. Zehui HuangH-Index: 5
view all 7 authors...
We present an integrated geomagnetic polarity and stratigraphic time scale for the Triassic, Jurassic, and Cretaceous periods of the Mesozoic Era, with age estimates and uncertainty limits for stage boundaries. The time scale uses a suite of 324 radiomenc dates, including high-resolution 40 Ar/ 39 Ar age estimates. This framework involves the observed ties between (1) radiometric dates, biozones, and stage boundaries, and (2) between biozones and magnetic reversals on the seafloor and in sedimen...
777 CitationsSource
#1R. A. Chadwick (BGS: British Geological Survey)H-Index: 12
The Wessex Basin of southern England, a Permian to Cretaceous extensional basin, can be structurally divided into a set of constituent asymmetrical graben, bounded by major E–W-trending zones of en echelon syn-depositional normal faults. The graben were inverted in late Cretaceous and Tertiary times by compressive stresses oriented roughly north–south. Inversion structures fall into two related categories. Regional upwarps overlie earlier graben depocentres and were formed by bulk shortening of ...
105 CitationsSource
#1Steven C. Cande (Columbia University)H-Index: 43
#2Dennis V. Kent (Columbia University)H-Index: 76
We have constructed a magnetic polarity time scale for the Late Cretaceous and Cenozoic based on an analysis of marine magnetic profiles from the world's ocean basins. This is the first time, since Heirtzler et al. (1968) published their time scale, that the relative widths of the magnetic polarity intervals for the entire Late Cretaceous and Cenozoic have been systematically determined from magnetic profiles. A composite geomagnetic polarity sequence was derived based primarily on data from the...
1,240 CitationsSource
#1John A. TardunoH-Index: 39
#2William LowrieH-Index: 44
Last. Friedrich HellerH-Index: 32
view all 5 authors...
Paleomagnetic and paleontologic data from the Valle della Contessa (Umbrian Apennines, Italy) span a 14 m.y. gap in previous magnetostratigraphic sections and reveal several intervals of reversed characteristic remanent magnetization (ChRM) in limestones and marls of the Albian Marne a Fucoidi. Rock magnetic data indicate that the reversed ChRM is carried by hematite having high unblocking temperatures (∼ 625–690° C). Hematite with these unblocking temperatures also carries a normal polarity ChR...
43 CitationsSource
Die Bohrung Metelen 1001 (MB 3809 Metelen) durchteufte eine 330,0 m machtige Folge der hoheren Oberkreide vom Obercampan bis zum Grenzbereich Campan/Santon. Die Schichtenfolge wird biostratigraphisch mit Hilfe von Foraminiferen gegliedert und das Ergebnis mit den Bohrungen Munsterland 1, Donar 1 und 5 sowie mit Aufschlussen und Bohrungen aus dem sudwestlichen Munsterland verglichen.
22 CitationsSource
An zwei Profilen, einem Bohrkern (Metelen 1001) und an Proben aus einem Bergwerksschacht (Radbod 6), wurde die Chron 33(R,N) der geomagnetischen Polaritatszeitskala fur die boreale Kreide erstmals beschrieben. Die Profile umfassen biostratigraphisch Mittelsanton bis unteres Obercampan (Rescher 1991). In diesem Intervall wurde ein invers polarisierter Abschnitt gefunden, der vom tiefen Campan bis in das Obercampan reicht und von einem gemischt polarisierten Bereich unterbrochen wird, wie er auch ...
10 CitationsSource
#1John A. Tarduno (ETH Zurich)H-Index: 39
A striking feature of the geomagnetic time scale is the ∼34 m.y. period of normal polarity field bias known as the Cretaceous Normal Polarity Superchron. New paleomagnetic data from three Deep Sea Drilling Project cores (Sites 317A, 402A, and 463) indicate that a brief interval of reversed polarity occurred during the Superchron. This reversed polarity interval may help refine past motions of the Pacific plate and aid resolution of the statistical structure of the geomagnetic reversal chronology...
48 CitationsSource
#1J. F. Lerbekmo (U of A: University of Alberta)H-Index: 11
ABSTRACT Magnetostratigraphic analysis was carried out on middle to lower Campanian strata of the Foremost and Pakowki formations in the Milk River area of southeastern Alberta to determine the position of the 33-33r polarity boundary. This magnetozone boundary is essentially at the Pakowki-Foremost formational contact on the eastern side of the Sweetgrass Arch (Long. approx. 111°), and occurs within the Baculites asperiformis ammonite zone of the Western Interior Basin. Radiometric dating withi...
13 Citations
Cited By43
Newest
#2Pierre Pellenard (CNRS: Centre national de la recherche scientifique)H-Index: 19
Last. Nicolas Thibault (UCPH: University of Copenhagen)H-Index: 18
view all 3 authors...
The Upper Cretaceous Flamborough Chalk Formation of the English Northern Chalk Province (Danes Dyke section, East Yorkshire, UK) has been sampled for isotope analyses to test for the expression of the positive carbon-isotope excursion defining the Santonian–Campanian Boundary Event (SCBE) in northern England, and to improve basin-scale correlations between the Boreal and Tethyan realms. Clay mineral investigations have been conducted in order to characterise potential variations in the detrital ...
Source
#1A. A. Guzhikova (SGU: Saratov State University)H-Index: 2
#2A. Yu. Guzhikov (SGU: Saratov State University)H-Index: 5
Last. A. M. Surinskiy (SGU: Saratov State University)H-Index: 2
view all 5 authors...
The detailed magnetostratigraphic study of the Turonian-Coniacian sections from the Volga right-bank region was conducted. The results on magnetic polarity from the Nizhnyaya Bannovka section (Saratov Region) (about 18 m thick) agree with the traditional data on exclusively normal regime of geomagnetic field polarity in the Cenomanian-Santonian ages. In the Kamennyi Brod section (Volgograd Region) between two zones of normal polarity an interval (about 16 m thick) occurs with no reliable paleoma...
Source
#1Mohammad Javad Razmjooei (Shahid Beheshti University)H-Index: 4
#2Nicolas Thibault (UCPH: University of Copenhagen)H-Index: 18
Last. Théophile Cocquerez (University of Burgundy)H-Index: 4
view all 11 authors...
Abstract A high-resolution stratigraphic analysis of the Upper Cretaceous Gurpi Formation has been undertaken in the Shahneshin section (Zagros Basin, Iran). New results on calcareous nannofossils, planktic foraminifers, dinoflagellate cysts and high-resolution carbon and oxygen stable isotopes form the basis of a reference section for the eastern Tethys that spans the upper Coniacian to the late Danian. Carbon-isotope correlation to Gubbio, Italy and the NW German chalk allows for the identific...
4 CitationsSource
#1Sarah J. Widlansky (UNH: University of New Hampshire)H-Index: 1
#2William C. Clyde (UNH: University of New Hampshire)H-Index: 25
Last. Nancy J. Stevens (OU: Ohio University)H-Index: 18
view all 5 authors...
This study uses magnetostratigraphy to help constrain the age of the paleontologically important Galula Formation (Rukwa Rift Basin, southwestern Tanzania). The formation preserves a Cretaceous vertebrate fauna, including saurischian dinosaurs, a putative gondwanatherian mammal, and notosuchian crocodyliforms. With better dating, the Galula Formation and its fossils help fill a temporal gap in our understanding of vertebrate evolution in continental Africa, enabling better evaluation of competin...
2 CitationsSource
#1Andrew J. Mumpy (U of A: University of Alberta)H-Index: 1
#2Octavian Catuneanu (U of A: University of Alberta)H-Index: 40
Abstract The Western Canada Sedimentary Basin is a retroarc foreland system produced by thrust sheet loading in the Canadian Cordillera and resultant flexural displacement of the lithosphere east of the orogenic front. Theoretical models of flexural tectonism and dynamic loading have long been used to predict the effects of these controls on the creation/destruction of accommodation in retroarc foreland settings, however, few field studies have attempted to evaluate their relative contributions ...
1 CitationsSource
#1Zofia Dubicka (University of Warsaw)H-Index: 9
#2Agata Jurkowska (AGH University of Science and Technology)H-Index: 6
Last. Ireneusz Felisiak (AGH University of Science and Technology)H-Index: 6
view all 7 authors...
Abstract An integrated biostratigraphic (foraminifera, calcareous nannofossils, crinoids), chemostratigraphic (stable carbon isotopes) and magnetostratigraphic study of the Bocieniec section (southern Poland) is presented here. The section presents a continuous and lithologically monotonous sedimentary record across the Santonian–Campanian boundary transition. A large number of macrofossil, foraminiferal and calcareous nannofossil bioevents along with several well-identified carbon-isotope excur...
6 CitationsSource
#1Taslima Anwar (U of A: University of Alberta)H-Index: 2
#2Andrew J. Mumpy (U of A: University of Alberta)H-Index: 1
Last. Octavian Catuneanu (U of A: University of Alberta)H-Index: 40
view all 5 authors...
Abstract We provide new paleomagnetic data for three densely-sampled cores from locations in the southern Alberta plains. The ages of the sampled intervals are well constrained by previous biostratigraphic studies, and record upper Santonian through middle Campanian deposition. The positions of magnetochron C33r and its bounding reversals C34n-C33r and C33r-C33n were determined using a rigorous paleomagnetic workflow, which included thermal dependent magnetic susceptibility and hysteresis experi...
1 Citations
#1M. D. Suttle (Imperial College London)H-Index: 4
#2Matthew J. Genge (Imperial College London)H-Index: 9
Abstract We report the discovery of fossil micrometeorites from Late Cretaceous chalk. Seventy-six cosmic spherules were recovered from Coniacian ( 87 ± 1 Ma ) sediments of the White Chalk Supergroup. Particles vary from pristine silicate and iron-type spherules to pseudomorphic spherules consisting of either single-phase recrystallized magnetite or Fe-silicide. Pristine spherules are readily identified as micrometeorites on the basis of their characteristic mineralogies, textures and compositio...
4 CitationsSource
#1Florencia N. Milanese (Facultad de Ciencias Exactas y Naturales)H-Index: 1
#2Norberto Malumián (CONICET: National Scientific and Technical Research Council)H-Index: 19
Last. Augusto E. Rapalini (Facultad de Ciencias Exactas y Naturales)H-Index: 22
view all 4 authors...
Problems of endemism and diachronous extinctions make global correlation of coeval strata in the mid Campanian-Maastrichtian of the James Ross Basin problematic. To provide a more precise chronological framework, we present two magnetostratigraphies of Campanian strata from the Rabot Formation that crops out at Hamilton Norte (200 m thick) and Redonda Point (340 m thick) in James Ross Island. Sampled sections consist of poorly-consolidated, drab-colored fine sandstones and mudstones. Bulk suscep...
2 CitationsSource
#1J. L. Till (IPGP: Institut de Physique du Globe de Paris)H-Index: 9
#2Yohan Jean Bernard Guyodo (University of Paris)H-Index: 3
Last. Georges Ona-Nguema (University of Paris)H-Index: 26
view all 5 authors...
Abstract The oriented chains of nanoscale Fe-oxide particles produced by magnetotactic bacteria are a striking example of biomineralization. Several distinguishing features of magnetite particles that comprise bacterial magnetosomes have been proposed to collectively constitute a biosignature of magnetotactic bacteria ( Thomas-Keprta et al., 2001 ). These features include high crystallinity, chemical purity, a single-domain magnetic structure, well-defined crystal morphology, and arrangement of ...
5 CitationsSource