Paleomagnetism of Sedimentary Rocks

Kodama, Kenneth P.

doi:10.1002/9781118384138

Cited by 93 publications

(123 citation statements)

References 0 publications

Supporting

Mentioning

113

Contrasting

Unclassified

Order By: Relevance

“…Other macrofossils including bivalves rarely provide reliable results (Van Calsteren & Thomas 2006). Magnetostratigraphy has obvious potential, following successful studies of similar deposits in the south of Cyprus (Kinnaird et al 2011;Weber et al 2011), but is dependent on the sediments preserving measurable stable magnetic remanence that is indicative of magnetic polarity (Kodama 2012). Strontium isotopic analysis is also useful but only for the dating of suitable, well-preserved fossils from an openmarine setting (Beets & De Ruig 1992;Müller 1993).…”

Section: Geological Backgroundmentioning

confidence: 99%

Quantitative dating of Pleistocene deposits of the Kyrenia Range, northern Cyprus: implications for timing, rates of uplift and driving mechanisms

Palamakumbura

Robertson

Kinnaird

et al. 2016

JGS

View full text Add to dashboard Cite

The Kyrenia Range underwent tectonically driven uplift during the Pliocene to Pleistocene in response to the interaction of various tectonic processes. To understand the tectonic processes driving the uplift and how this is related to uplift of other areas of the Eastern Mediterranean, uranium-series disequilibrium and optically stimulated luminescence dating were applied to marine and non-marine terrace deposits exposed on the northern flank of the range. Palaeomagnetism and strontium isotope dating were used in conjunction to date the final stages of the marine environment adjacent to the Kyrenia Range prior to major surface uplift. Uplift rates range from >1.2 mm a −1 , inferred during the Early Pleistocene, to <0.2 mm a −1 during the Late Pleistocene. The new data show that the Kyrenia Range was uplifted contemporaneously with the Troodos Massif in southern Cyprus. The uplift of the Kyrenia Range appears to have been significantly faster than that affecting other comparable regions in the easternmost Mediterranean during the Pleistocene (e.g. Lebanon coast; southern Anatolian plateau). The driving mechanism for the uplift of both the Kyrenia Range and the Troodos Massif is inferred to be the collision of the Eratosthenes Seamount with the Cyprus trench to the south of Cyprus.Supplementary material: Details of the methods used are available at https://doi.org/10.6084/m9.figshare.c.3260977.

show abstract

Section: Geological Backgroundmentioning

confidence: 99%

Quantitative dating of Pleistocene deposits of the Kyrenia Range, northern Cyprus: implications for timing, rates of uplift and driving mechanisms

Palamakumbura

Robertson

Kinnaird

et al. 2016

JGS

View full text Add to dashboard Cite

show abstract

“…Compaction, for example, is known to bias palaeomagnetic inclinations by making them shallower (e.g. Tauxe, 2011;Kodama, 2012). The young sediments at Caours, however, have undergone very little compaction, because they were never buried deeply.…”

Section: Discussionmentioning

confidence: 99%

“…Processes such as delayed lock-in time, and formation of new magnetic minerals, are possibly present in all sedimentary settings and certainly might complicate a straightforward interpretation of ChRM directions (e.g. Tauxe, 2011;Kodama, 2012). We believe we have arguments to infer that the lack of fully reserved directions is not due to the processes mentioned above, but rather to a combination of several factors such as weak NRM intensities, and occasionally large overprint components, making the isolation of the primary ChRM component direction difficult.…”

Section: Discussionmentioning

confidence: 99%

Evidence for the Blake Event recorded at the Eemian archaeological site of Caours, France

Sier

Parés

Antoine

et al. 2015

Quaternary International

View full text Add to dashboard Cite

a b s t r a c tA palaeomagnetic study of the Last Interglacial calcareous tufa sequence at the archaeological site of Caours (northern France) identified a geomagnetic excursion that we interpret as the Blake Event. Earlier palaeontological (molluscs, mammals) and geochemical proxy studies at this site allowed recognition of full interglacial conditions prevailing during the deposition of the tufa sequence. The tufa sequence and associated Palaeolithic levels have been dated to the Eemian interglacial by a set of TIMS U/Th measurements on calcitic concretions (average : 123 ± 3 ka). By previous correlations of the Blake Event with the Eemian sensu stricto (as defined in the Netherlands) pollenzones at Neumark Nord 2 (Germany) and Rutten (The Netherlands) it has been shown that the continental Eemian starts after the peak of Marine Isotope Stage (MIS) 5e. The identification of the Blake Event at Caours implies a post MIS 5e peak age for all four levels of the Palaeolithic occupation. In perspective of the time lag between the MIS 5e peak and the beginning of the Eemian identified in other studies, it is very likely that during the main occupation of Caours a significant barrier was in place between north western France and Great Britain, in the form of the English Channel. It is possible that the chronological position of the Last Interglacial environments in northwestern Europe in relation to sea-level change is a key factor behind the apparent absence of Last Interglacial Palaeolithic sites in Great Britain.

show abstract

“…More recently evidence is building for a mid-Proterozoic supercontinent, called either Nuna or Columbia (Zhang et al, 2012) from 1.74-1.59 Ga. Nuna is built mainly on data collected from Laurentia, Baltica, and the North China block for 1.78-1.40 Ga. Australia adds good data coverage for 1.80-1.60 Ga. Data from the remaining cratons (Amazonia, India, Siberia, Slave) is spotty (Zhang et al, 2012), illustrating the need for more robust apparent polar wander paths in the Precambian. As these ancient apparent polar wander paths are constructed, it will be important to identify and correct the effects of compaction-caused inclination shallowing in sedimentary rocks and the effects of grain-scale strain on the paleomagnetism of deformed rocks that will be almost unavoidable paleomagnetic targets for ancient Precambrian rocks (Kodama, 2012). The challenges for building accurate and well-constrained Precambrian pole paths are great, but ultimately critical to the Earth sciences.…”

mentioning

confidence: 99%