Age and geochemistry of the granitoid from the Lunte area, Northeastern Zambia: Implications for magmatism of the Columbia supercontinent
Rattachement africain : cn, Zambie. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
The Paleoproterozoic tectonic evolution of the Bangweulu Block has long been controversial. Paleoproterozoic granites consisting of the basement complex of the Bangweulu Block are widely exposed in northeastern Zambia, and they are the critical media for studying the tectonic evolution of the Bangweulu Block. This study systematically investigated the petrography, zircon U-Pb chronology, and petrogeochemistry of the granitoid extensively exposed in the Lunte area, northeastern Zambia. The results show that the granitoid in the area formed during 2051±13–2009±20 Ma as a result of Paleoproterozoic magmatic events. Geochemical data show that the granites in the area mainly include syenogranites and monzogranites of high-K calc-alkaline series and are characterized by high SiO2 content (72.68%‒73.78%) and K2O/Na2O ratio (1.82‒2.29). The presence of garnets, the high aluminum saturation index (A/CNK is 1.13‒1.21), and the 1.27%‒1.95% of corundum molecules jointly indicate that granites in the Lunte area are S-type granites. Rare earth elements in all samples show a rightward inclination and noticeably negative Eu-anomalies (δEu = 0.16‒0.40) and are relatively rich in light rare earth elements. Furthermore, the granites are rich in large ion lithophile elements such as Rb, Th, U, and K and are depleted in Ba, Sr, and high field strength elements such as Ta and Nb. In addition, they bear low contents of Cr (6.31×10−6‒10.8×10−6), Ni (2.87×10−6‒4.76×10−6), and Co (2.62×10−6‒3.96×10−6). These data lead to the conclusion that the source rocks are meta-sedimentary rocks. Combining the above results and the study of regional tectonic evolution, the authors suggest that granitoid in the Lunte area were formed in a tectonic environment corresponding to the collision between the Tanzania Craton and the Bangweulu Block. The magmatic activities in this period may be related to the assembly of the Columbia supercontinent.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Age and geochemistry of the granitoid from the Lunte area, Northeastern Zambia: Implications for magmatism of the Columbia supercontinent
- Date Crossref
- 01/01/2021
- Éditeur
- China Geology
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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China Geological Survey pays non établi dans la noticeInstitution
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China University of Geosciences (Beijing) pays non établi dans la noticeUniversité ou école supérieure
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Chongqing Bureau of Geology and Minerals Exploration pays non établi dans la noticeInstitution
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China Metallurgical Geology Bureau pays non établi dans la noticeUniversité ou école supérieure
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Bureau of Geology and Mineral Exploration and Development of Guizhou Province pays non établi dans la noticeOrganisme public
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Chinese Academy of Geological Sciences pays non établi dans la noticeStructure de recherche
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University of Zambia Zambie (code pays fourni par la source)Université ou école supérieure
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School of Earth Science and Resources pays non établi dans la noticeUniversité ou école supérieure
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Tianjin Center pays non établi dans la noticeInstitution
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Hebei Bureau of Geology and Mineral Resources Exploration Geological Brigade pays non établi dans la noticeStructure de recherche
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Geological Survey Department of Zambia Lusaka P.O. Box., Zambie (pays nommé en fin d’affiliation)Institution
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No pays non établi dans la noticeInstitution
China Geological Survey, China University of Geosciences (Beijing) et Chongqing Bureau of Geology and Minerals Exploration, avec 9 autres affiliations. Pays d’affiliation : Zambie.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.