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Can I read Garnet composition from the Reflejos de Mar LCT-pegmatite, Ancasti district, Argentina and its implication for exploration of primary deposits of lithium on EtoBox?
Garnet composition from the Reflejos de Mar LCT-pegmatite, Ancasti district, Argentina and its implication for exploration of primary deposits of lithium by Fernando Guillermo Sardi; Márcia Elisa Boscato Gomes; Silvana Elizabeth Marangone is a Earth and Planetary Sciences article available to read on EtoBox.
What is Garnet composition from the Reflejos de Mar LCT-pegmatite, Ancasti district, Argentina and its implication for exploration of primary deposits of lithium about?
The Reflejos de Mar Li-pegmatite, located in northwestern Argentina, is part of the Villismán pegmatite group, Ancasti District, Pampean Pegmatite Province. Four garnet crystals from the outermost part of the pegmatite were analyzed by major and minor elements (SiO 2 , TiO 2 , Al 2 O 3 , Cr 2 O 3 , MgO, CaO, MnO, FeO) using electron microprobe. The pegmatite belongs to the rare-element class, spodumene type, LCT (Li-Cs-Ta) petrogenetic family. Based on their Mn and Fe contents, the analyzed garnet can be assigned to the spessartine-almandine serie. The cores and rims of the analyzed garnets show significant differences for the divalent components in VIII-coordination, especially, Mn and Fe. The average MnO and FeO contents in the cores of the grains is 34.6 and 8.29 wt%, respectively, while in the rims is 29.31 and 12.95 wt%, respectively. The Fe/Mn ratio at the core of the grains is 0.24 while at the rims it is 0.44. Cr 2 O 3 and TiO 2 contents are very low (˂0.17 wt%) and the values of SiO 2 and Al 2 O 3 are ~36 and ~21 wt%, respectively. The mean chemical and molecular formulas of the core can be expressed: [(Mn 2.40 Fe 0.57 Ca 0.02 Mg 0.02 ) 3.01 (Al 1.99 Cr 0.002 ) 2.00 (Si 2.
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- Author
- Fernando Guillermo Sardi; Márcia Elisa Boscato Gomes; Silvana Elizabeth Marangone
- Publisher
- Pontificia Universidad Catolica de Valparaiso
- Published
- 2023
- Language
- EN
- Field
- Earth and Planetary Sciences (Physical Sciences)