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Petrography and rank of the Bhangtar coals, southeastern Bhutan

Abstract

In Bhutan, a potential coal deposit is exposed at Bhangtar in the 'landslide zone'. Nineteen coal seams are encountered in this area, and occur in the Lower Gondwana Supergroup preserved in between the Main Boundary Fault and the Thrust. The coal is low in moisture, {lt}1.76%, but the coal cores show moisture values of 3.16%. The ash content is up to 48.87% and increases substantially in the younger seams. The volatile content (on a pure coal basis) ranges from 23.38% to 41.02%. The sulphur content is less than 0.61%. The coals are non-coking. The amount of trace elements in the coal is quite low. The average petrographic composition of the Bhangtar coal is vitrinite - 31%, exinite - 2%, inertinite - 31%, and mineral and shaly matter - 36%, the vitrinite proportion decreases from the older to the younger seams, which are shaly. an age can be assigned to the Bhangtar coal. Based on oil reflectance, the rank of the coal is metalignitous to hypobituminous. The average microlithotype composition of the coal is vitrite - 30%, clarite - 1%, vitrinertite V - 14%, vitrinertite I - 11%, durite - 3%, fusite - 14%, and carbominerite - 27%. Vitrite decreases in  More>>
Authors:
Pareek, H S [1] 
  1. BH23, Meerut (India)
Publication Date:
Jul 01, 1990
Product Type:
Journal Article
Reference Number:
CLA-90-120071; EDB-90-175850
Resource Relation:
Journal Name: International Journal of Coal Geology; (Netherlands); Journal Volume: 15:3
Subject:
01 COAL, LIGNITE, AND PEAT; BHUTAN; COAL; PETROGRAPHY; PERMIAN PERIOD; AGE ESTIMATION; ASH CONTENT; COAL PREPARATION; COAL RANK; COAL RESERVES; COAL SEAMS; EXINITE; FOSSILS; INERTINITE; LITHOTYPES; MACERALS; MINERALS; MOISTURE; PALEONTOLOGY; PLANTS; REFLECTIVITY; SHALES; SULFUR CONTENT; VITRINITE; VOLATILE MATTER; ASIA; CARBONACEOUS MATERIALS; COAL DEPOSITS; DEVELOPING COUNTRIES; ENERGY SOURCES; FOSSIL FUELS; FUELS; GEOLOGIC AGES; GEOLOGIC DEPOSITS; MATERIALS; MATTER; MINERAL RESOURCES; OPTICAL PROPERTIES; PALEOZOIC ERA; PHYSICAL PROPERTIES; RESERVES; RESOURCES; ROCKS; SEDIMENTARY ROCKS; SURFACE PROPERTIES; 010600* - Coal, Lignite, & Peat- Properties & Composition; 011000 - Coal, Lignite, & Peat- Reserves, Geology, & Exploration
OSTI ID:
6409568
Country of Origin:
Netherlands
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 0166-5162; CODEN: IJCGD
Submitting Site:
NLC
Size:
Pages: 219-243
Announcement Date:

Citation Formats

Pareek, H S. Petrography and rank of the Bhangtar coals, southeastern Bhutan. Netherlands: N. p., 1990. Web. doi:10.1016/0166-5162(90)90052-Z.
Pareek, H S. Petrography and rank of the Bhangtar coals, southeastern Bhutan. Netherlands. doi:10.1016/0166-5162(90)90052-Z.
Pareek, H S. 1990. "Petrography and rank of the Bhangtar coals, southeastern Bhutan." Netherlands. doi:10.1016/0166-5162(90)90052-Z. https://www.osti.gov/servlets/purl/10.1016/0166-5162(90)90052-Z.
@misc{etde_6409568,
title = {Petrography and rank of the Bhangtar coals, southeastern Bhutan}
author = {Pareek, H S}
abstractNote = {In Bhutan, a potential coal deposit is exposed at Bhangtar in the 'landslide zone'. Nineteen coal seams are encountered in this area, and occur in the Lower Gondwana Supergroup preserved in between the Main Boundary Fault and the Thrust. The coal is low in moisture, {lt}1.76%, but the coal cores show moisture values of 3.16%. The ash content is up to 48.87% and increases substantially in the younger seams. The volatile content (on a pure coal basis) ranges from 23.38% to 41.02%. The sulphur content is less than 0.61%. The coals are non-coking. The amount of trace elements in the coal is quite low. The average petrographic composition of the Bhangtar coal is vitrinite - 31%, exinite - 2%, inertinite - 31%, and mineral and shaly matter - 36%, the vitrinite proportion decreases from the older to the younger seams, which are shaly. an age can be assigned to the Bhangtar coal. Based on oil reflectance, the rank of the coal is metalignitous to hypobituminous. The average microlithotype composition of the coal is vitrite - 30%, clarite - 1%, vitrinertite V - 14%, vitrinertite I - 11%, durite - 3%, fusite - 14%, and carbominerite - 27%. Vitrite decreases in proportion towards the younger seams, 'intermediates' show a concomitant increase, while durite and fusite remain constant. Carbonaceous shale contains fragmentary inertinite and vitrinite macerals and is interlayered with micro-bands of shaly coal which is characterised by abundant fragments of fusinite and vitrinite. The coal is very fragile and thus amenable to economic beneficiation. The coal is used as fuel in electric power plants. The Bhangtar coal is characteristically distinct from the Gondwana coals of India in petrography and rank, but correlates petrographically with the Kameng coals of Arunachal Pradesh, India. 18 refs., 4 figs., 8 tabs., 3 plates.}
doi = {10.1016/0166-5162(90)90052-Z}
journal = {International Journal of Coal Geology; (Netherlands)}
volume = {15:3}
journal type = {AC}
place = {Netherlands}
year = {1990}
month = {Jul}
}