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Mineral paragenesis and stratigraphic setting of the Neoproterozoic volcano-sedimentary succession of Samran Group, Jabal Farasan Area, West central Arabian Shield, Saudi Arabia

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Title Mineral paragenesis and stratigraphic setting of the Neoproterozoic volcano-sedimentary succession of Samran Group, Jabal Farasan Area, West central Arabian Shield, Saudi Arabia
 
Creator Mesaed, A A
Sonbul, A R
 
Subject Arabian shield rocks
Jabal Farasan
Samran Group
Volcaniclastics
 
Description 1066-1078
Jabal Farasan is located in the west central part of the Arabian Shield. The present study aims to reveal the stratigraphic
setting and mineral paragenesis of the exposed volcano-sedimentary succession of the Samran Group in Jabal Farasan area.
The succession of Samran Group is composed of three successive facies: the lower interbedded andesitic tuffs and
tuffaceous andesites and trachyte’s (F1), the middle-altered quartz diorite/andesite (F2) and, an upper interbedded andesitic
tuff, tuffaceous andesites and trachytes (F3). The vertical variations in the petrographic lithotypes depend mainly on the
position of the depositional sites relative to the volcanic centers (proximal and distal). Both the volcanic rocks and the
associated units are subjected to syn-and post-depositional diagenetic/metamorphic processes. These processes include the
formation of the Fe2+-silicates: (i.e., chlorite instead of the volcanic ashes and the formation of plagioclase minerals). Post
diagenetic recrystallization of the tuffaceous mudstones and the formation of microcrystalline quartz. The diagenetic
oxidation of the Fe2+-silicates led to the formation of volcaniclastic red beds in certain stratigraphic horizons.
 
Date 2022-05-26T10:22:53Z
2022-05-26T10:22:53Z
2021-12
 
Type Article
 
Identifier 2582-6727 (Online); 2582-6506 (Print)
http://nopr.niscair.res.in/handle/123456789/59754
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJMS Vol.50(12) [December 2021]