alexa Paleo Environmental Studies for Stream Sediments around Awe-Obi Area North Central Nigeria | OMICS International
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Research Article

Paleo Environmental Studies for Stream Sediments around Awe-Obi Area North Central Nigeria

Gajere JN1*, Abaa SI2 and Kana JE1
1Department of Natural Sciences, Nasarawa State Polytechnic, P.M. B. 109 Lafia, Nasarawa State, Nigeria
2Department of Geology and Mining, Nasarawa State University, P.M.B. 1022 Keffi, Nasarawa State, Nigeria
*Corresponding Author : Gajere JN
Department of Natural Sciences
Nasarawa State Polytechnic
P.M. B. 109 Lafia, Nasarawa State, Nigeria
Tel: +2348052900806
E-mail: [email protected]
Received September 29, 2014; Accepted February 22, 2015; Published February 24, 2015
Citation: Gajere JN, Abaa SI, Kana JE (2015) Paleo Environmental Studies for Stream Sediments around Awe-Obi Area North Central Nigeria. J Geol Geosci 4:197. doi:10.4172/2329-6755.1000197
Copyright: © 2015 Gajere JN, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

A stream’s sediment load is typically deposited, eroded, and redeposited many times in a stream channel, especially during climatic variations such as flooding. During this process of deposition, erosion and redeposition the chemistry of stream sediments changes. Understanding the past environmental conditions under which these sediments have been subjected to are of great significance to geologist interested in exploring for mineral and petroleum resources. Paleo Environmental studies conducted on 17 stream sediment samples in parts of Awe-Obi area using chemical index of alteration (CIA) and chemical index of weathering (CIW) revealed that the area is intense to extremely weathered with calculated values between 67 and 99. The mineralogical index of alteration (MIA) was studied to evaluate the degree of mineralogical weathering. The calculated values revealed that Awe-Obi is intermediate, intense-extremely weathered. Index of compositional variability (ICV) was used in this study as measure of sediment maturity. The calculated ICV values showed all the samples as immature except sample SSB8 which has a value of 0.765515. Paleo-Oxygenation condition of the study area was conducted using Ni/Co ratio. This revealed that all the samples were deposited in an oxygenated condition.

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