Variable Field Translation Balance

Krása, David; Petersen, Klaus; Petersen, N.

doi:10.1007/978-1-4020-4423-6_312

Cited by 19 publications

(15 citation statements)

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“…The cooling curve shows clearly reduced magnetization compared to the heating curve and the decrease appears to be due to chemical alteration of magnetic minerals during heating. Repeated M(T) runs with successively increasing maximum temperatures (Figure 8d) show that the drop between 380°C and 400°C does not result from an actual Curie temperature transition, but arises from magnetomineralogical alteration between 350°C and 400°C, most likely the inversion of maghemite to stable but weakly magnetic hematite [Krása et al, 2007]. This interpretation is reinforced by intensive reddening of the samples during the heating experiments.…”

Section: Magnetic Mineralogymentioning

confidence: 90%

“…These results are in accord with a volcanic source such as the Troodos ophiolitic complex. In order to characterize the mineral inventory further, magnetic high field experiments were carried out on 76 representative specimens using a variable field translation balance (VFTB) [Krása et al, 2007]. [14] Figure 8a summarizes the standardized isothermal remanent magnetization (IRM) acquisition curves of 56 specimens from Vlokkariá.…”

Section: Magnetic Mineralogymentioning

confidence: 99%

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Magnetostratigraphy of the Apalós Formation (early Pleistocene): Evidence for pulsed uplift of Cyprus

Weber

Schirmer

Heller

et al. 2011

Geochem. Geophys. Geosyst.

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[1] Landscape formation on Cyprus is controlled by processes directly linked to the uplift and unroofing of the Troodos ophiolite complex since mainly early Miocene times. Understanding the island's geology and dating individual tectonic events will help in differentiating between tectonically controlled uplift and eustatic sea level or climatic changes. In order to improve the timing of these events, a magnetostratigraphic study was carried out on two terraces in the Mesaoria Basin of central Cyprus. At Vlokkariá, southwest of Nicosia, an artificial cliff exposes the sedimentary Apalós Formation of early Pleistocene age. A nearby section situated on a terrace, probably postdating the Vlokkariá section, was sampled at Kókkinos. Remanence-carrying minerals are end-member magnetite and maghemite formed by exsolution and oxidation from ophiolitic titanomagnetite. Hematite as a late alteration product is also present. Alternating field demagnetized paleomagnetic samples yield predominantly reversed polarities interpreted to have been acquired as early detrital remanent magnetization during the Matuyama chron. Two zones of normal polarity within the Apalós Formation are interpreted to correlate to the Olduvai and Jaramillo subchrons. Pre-Apalós marine sediments at the bottom of the Vlokkariá section show transitional polarity behavior and therefore might correlate with the onset of the Reunion event. Results from the Kókkinos section are exclusively of normal polarity, which has been acquired during the Brunhes chron. Sedimentation rates derived from these magnetostratigraphic results are in the order of 3-6 cm/kyr with a marked increase to 50 cm/kyr just below the MatuyamaJaramillo polarity transition, which is interpreted to reflect increased uplift of the source area and supports the hypothesis of pulsed uplift of the Troodos ophiolite complex.

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Section: Magnetic Mineralogymentioning

confidence: 90%

Section: Magnetic Mineralogymentioning

confidence: 99%

Magnetostratigraphy of the Apalós Formation (early Pleistocene): Evidence for pulsed uplift of Cyprus

Weber

Schirmer

Heller

et al. 2011

Geochem. Geophys. Geosyst.

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“…For the determination of either hysteresis parameters and of Curie temperatures (T c ) a Variable Field Translation Balance (VFTB, Krása et al, 2007) was used.…”

Section: Field Procedures and Laboratory Methodsmentioning

confidence: 99%

“…2b) suggesting the presence of magnetite and showing no indication for the presence of any mineral with higher coercivity. Hysteresis parameters determined on a Variable Field Translation Balance (VFTB, (Krása et al, 2007)) are plotted in Fig. 2c and d. The distribution of hysteresis data on the day plot, even though it is a rather crude approach, plots along a proposed mixing curve (Dunlop, 2002, Fig.…”

Section: Rock Magnetismmentioning

confidence: 99%

Paleomagnetism of the Jurassic Transantarctic Mountains revisited — Evidence for large dispersion of apparent polar wander within less than 3 Myr

Lemna¹,

Bachtadse²,

Kirscher³

et al. 2016

Gondwana Research

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“…As distinguished to the original Weiss and Foex balance, in the VFTB the magnetic gradient is not produced by the special shape of the pole pieces of an electromagnet, but by a set of separate gradient coils (Krasa & Petersen & Petersen (2007)). The generated gradient field is not kept constant, but is oscillating with a certain frequency f .…”

Section: The Modified Vftbmentioning

confidence: 99%

Comparison of the temperature dependence of irreversible and reversible magnetization of basalt samples

Petersen¹,

Petersen²

2008

Physics of the Earth and Planetary Interiors

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Thermomagnetic curves are commonly used to characterize the magneto-mineralogy of basaltic rocks. It helps particularly for pre-selection of samples for paleointensity studies. However, the temperature dependence of the total magnetization is often different to the behavior of the remanence carriers. It is therefore of advantage to apply a new method to measure simultaneously the reversible and irreversible magnetization part. The method is based on a modified version of the Variable Field Translation Balance (VFTB). It is shown that the temperature dependence of the remanence carriers may be distinctly different to the total magnetization as seen in ordinary thermomagnetic curves.

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Variable Field Translation Balance

Cited by 19 publications

References 0 publications

Magnetostratigraphy of the Apalós Formation (early Pleistocene): Evidence for pulsed uplift of Cyprus

Magnetostratigraphy of the Apalós Formation (early Pleistocene): Evidence for pulsed uplift of Cyprus

Paleomagnetism of the Jurassic Transantarctic Mountains revisited — Evidence for large dispersion of apparent polar wander within less than 3 Myr

Comparison of the temperature dependence of irreversible and reversible magnetization of basalt samples

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