The use of electron spin resonance (ESR) for the determination of prehistoric lithic heat treatment

Toyoda, Shin; Ikeya, Motoji; Dunnell, Robert C.; McCutcheon, Patrick

doi:10.1016/0969-8043(93)90224-x

Cited by 26 publications

(11 citation statements)

References 11 publications

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“…The increase of the E' center can be explained by charge transfer from the A1 center, which concurrently decays . The ratio of the intensity of the unheated sample (I•) over the maximum intensity at 250øC (12) is dependent on the storage temperature of the sample Toyoda et al, 1993]. A study of samples from drill cores into oilbearing sandstones in eastern China demonstrated that the I•/I 2 ratio is closely associated with recent storage temperatures [Chen et al, 1997].…”

Section: Ljl 2 Ratio Of the E' Centermentioning

confidence: 99%

A new method for the estimation of cooling and denudation rates using paramagnetic centers in quartz: A case study on the Eldzhurtinskiy Granite, Caucasus

Grün¹,

Tani²,

Гурбанов³

et al. 1999

J. Geophys. Res.

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Abstract. We present a new method for the assessment of the most recent cooling and denudation rates using paramagnetic centers in quartz measured by electron spin resonance (ESR) spectroscopy. These centers have a relatively low thermal stability. For cooling rates of 40 ø and 1000øC Myr -•, effective closure temperatures vary between 55 ø and 82øC (Ti center) and 49 ø and 64 øC (A1 center), respectively. Samples were collected from two cores that were drilled into the Eldzhurtinskiy Granite, which has an emplacement age of ~2 Ma as measured by U/Pb analyses of zircons. One 1500 rn core was taken from a drill hole into the dome of the granite, a second core of 4000 rn from a drill hole at the base of the Baksan However, the ESR denudation rates underestimate the erosion rate of the Baksan Valley because the geothermal gradient is not equilibrated between the surface and the depth of the annihilation temperatures, 950 and 1800 rn for the A1 and Ti centers, respectively. We conclude that ESR measurements of paramagnetic centers in quartz will allow the reconstruction of landscape dynamics for the past 10-1000 kyr and that in conjunction with U/Pb, fission track, and Ar/Ar analyses it will be possible to develop dynamic models for Quaternary tectonic movements. Aim and Scope of This Study IntroductionThe aim of this study was to demonstrate that electron spin resonance (ESR) measurements of paramagnetic centers can be used for the estimation of denudation and cooling rates, to assess the potential of this method, and to identify the weaknesses on which future research has to be focussed. The cores of the Eldzhurtinskiy Granite were ideally suited for this study: samples could be collected from a very long core to study the thermal stabilities of all centers involved; the present day uplift rate is known (N6-8 mm a -• as measured by a nearby Global Positioning System (GPS) station using a Trimble 4000 SSE system); and it is a very young intrusion, suggesting that the paramagnetic centers would not be saturated.• Research School of Earth Sciences, Australian National University, Canberra, ACT, Australia.

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Section: Ljl 2 Ratio Of the E' Centermentioning

confidence: 99%

A new method for the estimation of cooling and denudation rates using paramagnetic centers in quartz: A case study on the Eldzhurtinskiy Granite, Caucasus

Grün¹,

Tani²,

Гурбанов³

et al. 1999

J. Geophys. Res.

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“…The thermal activation temperature of E' centers in quartz was reported mostly to be equal to 300°C [2] or rarely to 250°C [3]. The eight samples were subjected to isochronal annealing experiments, and six samples got the maximum ESR signals at 300°C and the other two samples at 350°C.…”

Section: Thermal Activation Temperaturementioning

confidence: 99%

“…Generally speaking, heating of samples can increase the value of I, but the enhanced ESR signals of E' centers in quartz on heating are only in small range under 200°C [2,3]. So another factor, that is, the time in which the samples were buried, should be considered.…”

Section: Relationship Between the Ij/iz And The Stratigraphic Agementioning

confidence: 99%

“…Recently the ratios of I, to IZ for E' centers in quartz grains, where I, is the natural E' spectral intensity and I Z is the E' spectral intensity after thermal activation, were used to estimate the heating temperature of ancient lithical tool fragments [2] and paleo-geotemperature [3]. In this study, we determined the I 1 "I2 ratios of E' centers in quartz from sediments and proposed some possible geological applications for this ratio, such as in geological dating and in paleo-geotemperature estimation.…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamical behavior of E′ centers in quartz from sediments: Potential for paleothermometry and geochronometry

Chen

et al. 2001

Appl. Magn. Reson.

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The thermodynamical behaviors of E' centers in 8 quartz samples from core XJ33-2-1 recovered in the Zhujiang Mouth Basin were measured by electron spin resonance (ESR) technique. The E' ESR spectral intensity of samples before any laboratory treatment was measured and expressed as I. The samples were then annealed at 300°C or 350°C for 60 min. The E' ESR spectral intensity measured after this procedure is expressed as I 2 . The ratios of I, to 12 for the samples increase with the sample depth (from 320 to 3972 m), showing that there is a correlation between this ratio and the storage temperature of samples. Therefore the ratio of ' "2 can be used as an ESR paleothermometer. Besides the temperature, we must take into account the period of time for which the samples have been buried since their deposition, because we find that the ratios 'I"2 (from 0.293 to 0.941) are closely related to the sediment ages (from 1.5 to 27.5 Ma), with a correlation coefficient of 0.98 or 0.99 obtained by linear or exponential regression, respectively. This relation can be explained by the increase of E' center concentration in quartz samples with the sedimentation age.

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“…The heating temperature of the burnt stone should be studied to ensure that all defects used for dating were annealed completely by heating. It can be estimated by ESR using signals of Fe 3+ ions or radiation-induced centers [3,4], which was applied to soil investigation to distinguish between burnt and unbumt soil [5]. Thermoluminescence (TL) dating was frequently applied to bumt stones, heated chert and burnt flint [6].…”

Section: Introductionmentioning

confidence: 99%

ESR study of thermal history and dating of a stone tool

et al. 1997

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Electron spin resonance (ESR) of Fe 3 § ions and of radiation-induced centers in quartz (E', peroxy and Al centers) was studied to distinguish between bumt and unburnt stone tools and to determine their age. The yellow stone tool with a reddish edge discovered at the paleolithic site in Kamitakamori, northern Japan, was investigated. The ESR spectrum intensity of Fe 3 § ions around g = 4.3 and the color of the material changed at 600~ and 240~ respectively, which indicates that the red part was heated at 240-600~ The E' center in the red part was used for dating because isochronal annealing expe¡ showed low thermal stability of the Al center and overlap of broad signals at g = 2.0086 onto the peroxy center. Assuming the same efficiency of defeet formation in the red part as of that in the laboratory-heated material at 450~ the obtained age of 520-770 ka is in concordance with the ages of the tephra layers at the site.

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The use of electron spin resonance (ESR) for the determination of prehistoric lithic heat treatment

Cited by 26 publications

References 11 publications

A new method for the estimation of cooling and denudation rates using paramagnetic centers in quartz: A case study on the Eldzhurtinskiy Granite, Caucasus

A new method for the estimation of cooling and denudation rates using paramagnetic centers in quartz: A case study on the Eldzhurtinskiy Granite, Caucasus

Thermodynamical behavior of E′ centers in quartz from sediments: Potential for paleothermometry and geochronometry

ESR study of thermal history and dating of a stone tool

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