Fission track ages of cogenetic minerals of the Nellore mica belt of India

Nagpaul, K. K.; Mehta, P. P.; Gupta, Mohan L.

doi:10.1007/bf00875928

Cited by 20 publications

(2 citation statements)

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“…The spread of the available dates further shows that the Indian Ocean cycle spanned the period 700-450 Ma (Sarkar, 1972). The mean age of 475±90 Ma, for biotites, obtained in the present study is in accordance with the mean age of 487±17 Ma for 6 biotite samples from the Nellore pegmatites obtained by Nagpaul, Mehta & Gupta (1974). Coexisting apatites and muscovites in the latter rocks yielded mean ages of 422±10 Ma respectively.…”

Section: Discussionsupporting

confidence: 90%

Fission track ages of biotites from crystalline rocks of Khammam district, Andhra Pradesh, India

1978

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Section: Discussionsupporting

confidence: 90%

Fission track ages of biotites from crystalline rocks of Khammam district, Andhra Pradesh, India

1978

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“…Annealing of latent radiation damage tracks in various SSNTDs was known to considerably influence etch rates and etchable range of tracks, the critical angle of track registration, and fission track ages of minerals [36][37][38][39]. It was well established that heating of minerals results in reduction of track densities as well as track lengths and diameters.…”

Section: Annealing Studies Of Radiation Damage In Ssntdsmentioning

confidence: 99%

Modgil-Virk Formulation of Single Activation Energy Model of Radiation Damage Annealing in SSNTDs: A Critical Appraisal

Virk

2015

SSP

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Passage of heavy ions produces radiation-damage trails known as latent tracks in a variety of solid-state nuclear-track detectors (SSNTDs). These tracks are made visible in an optical microscope by a simple process known as chemical etching. It is a well-known fact that latent tracks are radiation damage trails in SSNTDs, which can be annealed by thermal heating. Modgil-Virk formulation of single-activation-energy model of radiation damage annealing was proposed as an empirical approach for explaining the thermal fading of nuclear tracks in SSNTDs. The empirical formulation of this model is based on track annealing data collected from both isothermal and isochronal experiments performed on different types of SSNTDs using a variety of heavy ion beams and fission fragments. The main objective of this empirical model was to resolve some contradictions of variable activation energy derived by using Arrhenius plots to study annealing in mineral SSNTDs. Some equivalent versions of the Modgil-Virk model have been proposed but the concept of single activation energy is vindicated in all empirical formulations. The model always yields a unique value of activation energy independent of the nature of the ion beam used and the degree of annealing. The anisotropy of the mineral SSNTDs is revealed by variation in activation energy along different crystal planes and even with different orientations of the ion beam on the same plane. Some recent experiments are a pointer to the successful exploitation of this model for future cosmic-rays studies using SSNTDs.

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Annealing studies on radiation damages in biotite, apatite and sphene and corrections to fission track ages

Nagpaul

Mehta

Gupta³

1974

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Fission track ages of cogenetic minerals of the Nellore mica belt of India

Cited by 20 publications

References 19 publications

Fission track ages of biotites from crystalline rocks of Khammam district, Andhra Pradesh, India

Fission track ages of biotites from crystalline rocks of Khammam district, Andhra Pradesh, India

Modgil-Virk Formulation of Single Activation Energy Model of Radiation Damage Annealing in SSNTDs: A Critical Appraisal

Annealing studies on radiation damages in biotite, apatite and sphene and corrections to fission track ages

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