Biogeochemical behavior of Ampelozizyphus amazonicus Ducke in the Pitinga mining district, Amazon, Brazil |
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| Authors: | M C Lima e Cunha V P Pereira E Menegotto A C Bastos Neto L D Oliveira M L L Formoso |
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| Institution: | (1) Centro de Estudos em Petrologia e Geoquímica, Instituto de Geociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil;(2) Researcher of Desenvolvimento Tecnológico Industrial, CNPq—Level 1D, Rio de Janeiro, Brazil |
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| Abstract: | The vegetal species Ampelozizyphus amazonicus Ducke (Rhamnaceae Family) was chosen as a sampling medium for the lateritic surfaces of the Pitinga Mine in the Amazon region,
in order to study the biogeochemical behavior of this species and compare it with the chemical composition of a reference
plant. The Pitinga mining district is one of the largest producers of tin in the world. This district contains unique deposits
of cryolite and rare metals such as Zr, Nb, Ta, Y and REEs related to granitic bodies that intrude into the volcanic and acid
pyroclastic rocks. The results showed that the species A. amazonicus predominantly concentrates significant levels of Zr, Nb, Ta, Th, Be, Sc over U, Hf, Ga and In. These elements are characteristic
of the mineral paragenesis for the region, suggesting that this plant can provide a representative sampling medium future
geochemical exploration programs in the region. |
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| Keywords: | Biogeochemistry Lateritic surface Amazon region Ampelozizyphus amazonicus |
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