{"title":"喀麦隆西部Nkogam第三纪地块:全岩Rb/Sr的主要特征和地质年代学","authors":"M. Caen-Vachette , P. Tempier , P. Kamgang","doi":"10.1016/0899-5362(87)90092-3","DOIUrl":null,"url":null,"abstract":"<div><p>The Nkogam massif is exposed over an area of about 140 km<sup>2</sup>. It is located on the ‘Cameroun Line’ and is one of the tertiary massives along this structure. It is composed of three units: (1) basalts; (2) ignimbrites; and (3) acid plutonic rocks. The first two are alkalic, the third one is peraluminous. Rb/Sr radiometric analysis on whole rocks yields an age of 67 Ma for the granites. The fact that two parallel isochrons are obtained shows possible slightly different origins.</p></div>","PeriodicalId":100749,"journal":{"name":"Journal of African Earth Sciences (1983)","volume":"6 4","pages":"Pages 521-524"},"PeriodicalIF":0.0000,"publicationDate":"1987-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0899-5362(87)90092-3","citationCount":"12","resultStr":"{\"title\":\"Le massif tertiaire du Nkogam (Ouest Cameroun): caractéristiques principales et géochronologie Rb/Sr sur roches totales\",\"authors\":\"M. Caen-Vachette , P. Tempier , P. Kamgang\",\"doi\":\"10.1016/0899-5362(87)90092-3\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The Nkogam massif is exposed over an area of about 140 km<sup>2</sup>. It is located on the ‘Cameroun Line’ and is one of the tertiary massives along this structure. It is composed of three units: (1) basalts; (2) ignimbrites; and (3) acid plutonic rocks. The first two are alkalic, the third one is peraluminous. Rb/Sr radiometric analysis on whole rocks yields an age of 67 Ma for the granites. The fact that two parallel isochrons are obtained shows possible slightly different origins.</p></div>\",\"PeriodicalId\":100749,\"journal\":{\"name\":\"Journal of African Earth Sciences (1983)\",\"volume\":\"6 4\",\"pages\":\"Pages 521-524\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1987-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/0899-5362(87)90092-3\",\"citationCount\":\"12\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of African Earth Sciences (1983)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/0899536287900923\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of African Earth Sciences (1983)","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0899536287900923","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Le massif tertiaire du Nkogam (Ouest Cameroun): caractéristiques principales et géochronologie Rb/Sr sur roches totales
The Nkogam massif is exposed over an area of about 140 km2. It is located on the ‘Cameroun Line’ and is one of the tertiary massives along this structure. It is composed of three units: (1) basalts; (2) ignimbrites; and (3) acid plutonic rocks. The first two are alkalic, the third one is peraluminous. Rb/Sr radiometric analysis on whole rocks yields an age of 67 Ma for the granites. The fact that two parallel isochrons are obtained shows possible slightly different origins.
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