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Mazumdar, Aninda
- Effects of Variations in Specimen Thickness on Illite "Crystallinity" Measurements
Abstract Views :176 |
PDF Views:2
Authors
Affiliations
1 Department of Geology, University of Delhi, Delhi-110 007, IN
1 Department of Geology, University of Delhi, Delhi-110 007, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 54, No 5 (1999), Pagination: 495-499Abstract
The 'Kubler index' (Δ°2θ) has been extensively used to document degree of metamorphism in very low grade pelitic rocks and to mark the diagenetic-anchizonal and anchizonal-epizonal boundaries. However, variations in sample preparation procedures significantly affect the Δ°2θ measurements. The effect of variation in thickness (mg/cm2) of the clay layer on Δ°2θ measurements has been studied here. The Δ°2θ values drops rapidly for slides with clay loading less than ∼2-3 mg/cm2 and achieve more or less a plateau beyond this thickness. Owing to the rapid change in slope, even minor variation in thickness (which is difficult to constrain) can significantly affect the Δ°2θ measurements. Low X-ray intensities recorded for thin slides also add uncertainty to the Δ°2θ measurements.Keywords
Mineral Physics, Illite Crystallinity, Kubler Index, Himalaya.- Can Hydrocarbons in Coastal Sediments be Related to Terrestrial Flux? A Case Study of Godavari River Discharge (Bay of Bengal)
Abstract Views :267 |
PDF Views:95
Authors
Rayaprolu Kiran
1,
V. V. J. Gopala Krishna
1,
B. G. Naik
1,
G. Mahalakshmi
2,
R. Rengarajan
3,
Aninda Mazumdar
2,
Nittala S. Sarma
1
Affiliations
1 Marine Chemistry Laboratory, Andhra University, Visakhapatnam 530 003, IN
2 National Institute of Oceanography, Dona Paula, Goa 403 004, IN
3 Physical Research Laboratory, Navrangpura, Ahmedabad 380 009, IN
1 Marine Chemistry Laboratory, Andhra University, Visakhapatnam 530 003, IN
2 National Institute of Oceanography, Dona Paula, Goa 403 004, IN
3 Physical Research Laboratory, Navrangpura, Ahmedabad 380 009, IN