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Mineralogia e química de fragmentos cerâmicos arqueológicos em sítio com Terra Preta da Amazônia Colombiana.

Authors :
da Costa, Marcondes Lima
Rios, Gaspar Morcote
da Silva, Mônia Maria Carvalho
da Silva, Glayce Jholy
Molano-Valdes, Uliana
Source :
Rem: Revista Escola de Minas. Jan2011, Vol. 64 Issue 1, p17-23. 7p. 3 Color Photographs, 1 Diagram, 1 Chart, 1 Map.
Publication Year :
2011

Abstract

Several Archaeological Dark Earth (ADE) sites have been already found in the Colombian Amazon forest showing high content of archaeological ceramic fragments similarly to those in the Brazilian Amazon represented by Quebrada Tacana site. Their fragments are yellow to grey colour, display a burned clayey matrix which involves fragments of cariapé and coal and ash particles, besides grains of quartz and micas. The clay matrix is made of metakaolinite, quartz, and some mica flakes, chlorite and sepiolite. Cariapé and cauixi spicules are constituted of cristobalite, which is also the main mineral component of the coal and ashes. Although not detected by X-ray diffraction, the phosphate minerals should be present, since the contents of phosphor reach up to 2.90 Wt.% P2O5. Possibly it occurs as aluminium-phosphate, since Ca contents fall below 0.1 Wt.%. These mineralogical and chemical characteristics allow to correlate these ceramic fragments with those found in the ADE in Brazil and reinforce phosphor as an important chemical component, which indicates human activity by the daily use of pottery all over the Amazon region. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
03704467
Volume :
64
Issue :
1
Database :
Academic Search Index
Journal :
Rem: Revista Escola de Minas
Publication Type :
Academic Journal
Accession number :
59782687