The petrology, geochemistry and petrogenesis of the Edough igneous rocks, Annaba, NE Algeria

Journal of African Earth Sciences (and the Middle East) Pub Date : 1993-07-01 DOI:10.1016/0899-5362(93)90027-N

Y. Ahmed-Said, B.E. Leake , G. Rogers

{"title":"The petrology, geochemistry and petrogenesis of the Edough igneous rocks, Annaba, NE Algeria","authors":"Y. Ahmed-Said, B.E. Leake , G. Rogers","doi":"10.1016/0899-5362(93)90027-N","DOIUrl":null,"url":null,"abstract":"<div>Microgranites and rhyolites of the Edough complex, Annaba, NE Algeria are described. Their petrology and geochemistry indicate that these calc-alkaline, probable Tertiary rocks, evolved by feldspar-dominated fractional crystallization of a basic magma. Trace elements and isotopic ratios of Sr (87Sr/86Sr16.0 = 0.71947−0.72404) and detailed petrogenetic modelling exclude the granites from being produced solely by simple crystal fractionation of a basaltic magma and the similarities of these ratios to those of the Edough biotite gneisses (87Sr/86Sr16.0 = 0.71840−0.73008) confirm a genetic link. We conclude that the Edough Tertiary magmatic rocks and perhaps many of the Tertiary igneous rocks of NE Algeria were produced by crystal fractionation of mantle-derived basaltic magma which subsequently assimilated substantial amounts of crustal material of the type Edough biotite gneisses.</div>","PeriodicalId":100750,"journal":{"name":"Journal of African Earth Sciences (and the Middle East)","volume":"17 1","pages":"Pages 111-123"},"PeriodicalIF":0.0000,"publicationDate":"1993-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0899-5362(93)90027-N","citationCount":"17","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of African Earth Sciences (and the Middle East)","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/089953629390027N","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 17

Abstract

Microgranites and rhyolites of the Edough complex, Annaba, NE Algeria are described. Their petrology and geochemistry indicate that these calc-alkaline, probable Tertiary rocks, evolved by feldspar-dominated fractional crystallization of a basic magma. Trace elements and isotopic ratios of Sr (⁸⁷Sr/⁸⁶Sr_16.0 = 0.71947−0.72404) and detailed petrogenetic modelling exclude the granites from being produced solely by simple crystal fractionation of a basaltic magma and the similarities of these ratios to those of the Edough biotite gneisses (⁸⁷Sr/⁸⁶Sr_16.0 = 0.71840−0.73008) confirm a genetic link. We conclude that the Edough Tertiary magmatic rocks and perhaps many of the Tertiary igneous rocks of NE Algeria were produced by crystal fractionation of mantle-derived basaltic magma which subsequently assimilated substantial amounts of crustal material of the type Edough biotite gneisses.

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

阿尔及利亚东北部安纳巴Edough火成岩的岩石学、地球化学及成因

描述了阿尔及利亚东北部安纳巴Edough杂岩的微花岗岩和流纹岩。岩石学和地球化学表明，这些钙碱性岩石可能是由长石为主的基性岩浆分晶演化而成的第三纪岩石。Sr的微量元素和同位素比值(87Sr/86Sr16.0 = 0.71947−0.72404)和详细的岩石成因模拟排除了花岗岩仅仅是由玄武岩浆的简单晶体分选产生的，这些比值与Edough黑云母片麻岩(87Sr/86Sr16.0 = 0.71840−0.73008)的相似性证实了它们的成因联系。我们得出结论，阿尔及利亚东北部的Edough第三纪岩浆岩和许多第三纪火成岩是由幔源玄武岩岩浆的晶体分选产生的，这些岩浆随后吸收了大量的Edough黑云母片麻岩类型的地壳物质。

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分钟内获得全文去求助

来源期刊

Journal of African Earth Sciences (and the Middle East)

自引率

0.00%

发文量