Trace elements geochemistry, total organic carbon, palaeosalinity, and hydrothermal characteristics of the Cretaceous black shale in the Mamfe Basin (West Africa)

IF 2 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY
Bokanda Ekoko Eric , Philip Fralick , Bisse Salomon Betrant , Ashukem Ethel Nkongho , Belinga Belinga Cedric , Bokanda Frankline Besonge , Ligbwah Victor Wotanie , Chin Thiery Berinyuy , Ekomane Emile
{"title":"Trace elements geochemistry, total organic carbon, palaeosalinity, and hydrothermal characteristics of the Cretaceous black shale in the Mamfe Basin (West Africa)","authors":"Bokanda Ekoko Eric ,&nbsp;Philip Fralick ,&nbsp;Bisse Salomon Betrant ,&nbsp;Ashukem Ethel Nkongho ,&nbsp;Belinga Belinga Cedric ,&nbsp;Bokanda Frankline Besonge ,&nbsp;Ligbwah Victor Wotanie ,&nbsp;Chin Thiery Berinyuy ,&nbsp;Ekomane Emile","doi":"10.1016/j.sesci.2022.07.001","DOIUrl":null,"url":null,"abstract":"<div><p>The shales of the Mamfe basin were geochemically analyzed to determine their paleosalinity and hydrothermal characteristics which existed at the time of their deposition. Elemental ratios such as boron/gallium (B/Ga), strontium/barium (Sr/Ba), and total sulphur/total organic carbon (S/TOC) and TOC/S were applied for paleosalinity reconstruction. The shales of the Mamfe basin show B/Ga is &lt;3, Sr/Ba &lt;0.2, and S/TOC is &lt;0.1 and TOC/S &gt;6 the values of the elemental ratio show that the Mamfe shales were deposited in a freshwater environment. For hydrothermal activities ratio, Sc/Cr was used and Binary diagrams TOC vs P and Co/Zn vs TOC were constructed to discriminate between normal water, mixed and hydrothermal influence. The Sc/Cr ratio was greater than 0.14 indicating that the shales in the Mamfe basin were deposited in a normal water environment with no influence from hydrothermal processes. The binary discriminant diagram of TOC vs P and Co/Zn vs TOC shows that all the shales were not influenced by any hydrothermal processes during the time of their deposition.</p></div>","PeriodicalId":54172,"journal":{"name":"Solid Earth Sciences","volume":"7 3","pages":"Pages 237-246"},"PeriodicalIF":2.0000,"publicationDate":"2022-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2451912X22000216/pdfft?md5=1028bd041ac7c7f8857c83f9ab982c96&pid=1-s2.0-S2451912X22000216-main.pdf","citationCount":"4","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Solid Earth Sciences","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2451912X22000216","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 4

Abstract

The shales of the Mamfe basin were geochemically analyzed to determine their paleosalinity and hydrothermal characteristics which existed at the time of their deposition. Elemental ratios such as boron/gallium (B/Ga), strontium/barium (Sr/Ba), and total sulphur/total organic carbon (S/TOC) and TOC/S were applied for paleosalinity reconstruction. The shales of the Mamfe basin show B/Ga is <3, Sr/Ba <0.2, and S/TOC is <0.1 and TOC/S >6 the values of the elemental ratio show that the Mamfe shales were deposited in a freshwater environment. For hydrothermal activities ratio, Sc/Cr was used and Binary diagrams TOC vs P and Co/Zn vs TOC were constructed to discriminate between normal water, mixed and hydrothermal influence. The Sc/Cr ratio was greater than 0.14 indicating that the shales in the Mamfe basin were deposited in a normal water environment with no influence from hydrothermal processes. The binary discriminant diagram of TOC vs P and Co/Zn vs TOC shows that all the shales were not influenced by any hydrothermal processes during the time of their deposition.

西非Mamfe盆地白垩系黑色页岩微量元素地球化学、总有机碳、古盐度及热液特征
对马铁盆地页岩进行了地球化学分析,确定了其沉积时的古盐度和热液特征。采用硼/镓(B/Ga)、锶/钡(Sr/Ba)、总硫/总有机碳(S/TOC)和TOC/S等元素比值进行古盐度重建。马fe盆地页岩B/Ga值为<3, Sr/Ba值为<0.2, S/TOC值为<0.1, TOC/S值为>6,元素比值表明马fe盆地页岩沉积于淡水环境。热液活度比采用Sc/Cr,构建TOC / P和Co/Zn / TOC二元图,区分正常水、混合水和热液影响。Sc/Cr比值大于0.14,表明该区页岩沉积在正常的水环境中,未受热液作用的影响。TOC / P和Co/Zn / TOC二元判别图表明,所有页岩在沉积时期均未受到热液作用的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Solid Earth Sciences
Solid Earth Sciences GEOSCIENCES, MULTIDISCIPLINARY-
CiteScore
3.60
自引率
5.00%
发文量
20
审稿时长
103 days
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信