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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/7870

Title: Pseudotachylites of the Kui-Chitraseni shear zones of the precambrian Aravalli Motintain, Rajasthan
Authors: BISWAL, TK
SARKAR, S
PAL, A
CHAKRABORTY, U
Keywords: s-c mylonites
delhi-supergroup
fault-zone
southwest rajasthan
cataclastic rocks
india
geochemistry
gujarat
history
origin
Issue Date: 2004
Publisher: GEOLOGICAL SOC INDIA
Citation: JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA, 64(3), 325-335
Abstract: Cataclasites-pseudotachylites are developed along the Kui-Chitraseni shear zone of the Aravalli Mountain. The pseudotachylites are microlitic belonging to three varieties referred to here as patchy-, vein- and fracture-pseudotachylites. The patchy pseudotachylites are the most dominating type that occur in association with cataclasites and show an increase in abundance from the margin of the shear zone towards the center. Vein pseudotachylites owe their origin to the injection of the patchy variety through extensional fractures. Fracture pseudotachylites, the youngest of all, occur along the late stage shear fractures. Presence of vesicles, flow texture, embayed margin of the clasts in addition to power law distribution of coarser clasts and high values of roundness (0.4) support the melt origin of the pseudotachylites. Ultracataclasis followed by frictional melting of the Erinpura granites along the shear zone is ascribed for the development of the cataclasites and pseudotachylites.
URI: http://dspace.library.iitb.ac.in/xmlui/handle/10054/7870
http://hdl.handle.net/10054/7870
ISSN: 0016-7622
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