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Content Provider | Springer Nature Link |
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Author | Pandey, Shivani Parcha, Suraj K |
Copyright Year | 2017 |
Abstract | The geochemical study of siliciclastic rocks from the Lower Cambrian of Parahio Valley has been studied to describe the provenance, chemical weathering and tectonic setting. The K$_{2}$O/Al$_{2}$O$_{3}$ ratio and positive correlation of Co (r=0.85), Ni (r=0.86), Zn (r=0.82), Rb (r=0.98) with K$_{2}$O reflects that the presence of clay minerals control the abundances of these elements and suggests a warm and humid climate for this region. The chondrite normalized REE pattern of the samples is equivalent to upper continental crust, which reflects enriched LREE and flat HREE with negative Eu anomaly. The tectonic setting discriminant diagram log[K$_{2}$O/Na$_{2}$O] vs. SiO$_{2}$; [SiO$_{2}$/Al$_{2}$O$_{3}$] vs. log[K$_{2}$O/Na$_{2}$O]; [SiO$_{2}$/20] – [K$_{2}$O+Na$_{2}$O] – [TiO$_{2}$+Fe$_{2}$O$_{3}$+MgO] indicates transitional tectonic setting from an active continental margin to a passive margin. The discriminant function plot indicates quartzose sedimentary provenance, and to some extent, the felsic igneous provenance, derived from weathered granite, gneissic terrain and/or from pre-existing sedimentary terrain. The CIA value indicates low to moderate degree of chemical weathering and the average ICV values suggests immature sediments deposited in tectonically active settings. The A–CN–K diagram indicates that these sediments were generated from source rocks of the upper continental crust. |
Starting Page | 1 |
Ending Page | 16 |
Page Count | 16 |
File Format | |
ISSN | 02534126 |
Journal | Journal of Earth System Science |
Volume Number | 126 |
Issue Number | 2 |
e-ISSN | 0973774X |
Language | English |
Publisher | Springer India |
Publisher Date | 2017-03-08 |
Publisher Institution | Indian Academy of Sciences |
Publisher Place | New Delhi |
Access Restriction | One Nation One Subscription (ONOS) |
Subject Keyword | Lower Cambrian provenance tectonic setting chemical weathering. Earth Sciences Space Sciences (including Extraterrestrial Physics, Space Exploration and Astronautics) |
Content Type | Text |
Resource Type | Article |
Subject | 1900/1901 |
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