Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Diagenetic features of Jurassic Fort Member sandstone, Jaisalmer formation, western Rajasthan

Diagenetic features of Jurassic Fort Member sandstone, Jaisalmer formation, western Rajasthan Jaisalmer Formation consists of 360m thick succession of medium to coarse grained sandstones with interbeds of shale, claystone and occasional lignite that rest over Lathi Formation, is the basal part of the Jaisalmer basin. The rocks are exposed amidst desert, low mounds and shallow stone quarries. Sandstones were deposited in shallow marine to deltaic environments. The studied sandstones consist of abundant quartz followed by feldspar, mica, chert, rock fragments and heavy minerals. The study mainly deals with identification of various diagenetic features such as compaction, cementation and porosity evolution. During mechanical compaction rearrangement of grains took place and point, long and suture contacts were formed. The sandstones are cemented by iron oxide, silica overgrowth, carbonate and clay. Porosity has developed due to dissolution of iron, carbonate cement and feldspar grains. Dissolution and alteration of feldspar, lithic fragments and pressure solution were the main source of quartz cements. The sandstones show good amount of existing optical porosity with an average of 7.19%. Porosity reduction is mainly due to early stage of mechanical compaction and subsequent pervasive calcite and iron oxide cementation. Further, porosity reduced due to deposition of clay cement. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of the Geological Society of India Springer Journals

Diagenetic features of Jurassic Fort Member sandstone, Jaisalmer formation, western Rajasthan

Loading next page...
 
/lp/springer-journals/diagenetic-features-of-jurassic-fort-member-sandstone-jaisalmer-OckXrIilPM

References (74)

Publisher
Springer Journals
Copyright
Copyright © 2017 by Geological Society of India
Subject
Earth Sciences; Geology; Hydrogeology
ISSN
0016-7622
eISSN
0974-6889
DOI
10.1007/s12594-017-0715-7
Publisher site
See Article on Publisher Site

Abstract

Jaisalmer Formation consists of 360m thick succession of medium to coarse grained sandstones with interbeds of shale, claystone and occasional lignite that rest over Lathi Formation, is the basal part of the Jaisalmer basin. The rocks are exposed amidst desert, low mounds and shallow stone quarries. Sandstones were deposited in shallow marine to deltaic environments. The studied sandstones consist of abundant quartz followed by feldspar, mica, chert, rock fragments and heavy minerals. The study mainly deals with identification of various diagenetic features such as compaction, cementation and porosity evolution. During mechanical compaction rearrangement of grains took place and point, long and suture contacts were formed. The sandstones are cemented by iron oxide, silica overgrowth, carbonate and clay. Porosity has developed due to dissolution of iron, carbonate cement and feldspar grains. Dissolution and alteration of feldspar, lithic fragments and pressure solution were the main source of quartz cements. The sandstones show good amount of existing optical porosity with an average of 7.19%. Porosity reduction is mainly due to early stage of mechanical compaction and subsequent pervasive calcite and iron oxide cementation. Further, porosity reduced due to deposition of clay cement.

Journal

Journal of the Geological Society of IndiaSpringer Journals

Published: Sep 20, 2017

There are no references for this article.