Mineralogical study of the La Hueca Cretaceous Iron-Manganese deposit, Michoacán, south-western Mexico
In this work we describe for the first time the mineralogy and very briefly the possible origin of abanded Fe-Mn deposit associated with a Cretaceous volcanosedimentary sequence of the southern Guerreroterrane, near the sulfide massive volcanogenic deposit of La Minita. The deposit is confined withi...
| Autores: | , , , , |
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| Tipo de documento: | artigo |
| Estado: | Versão publicada |
| Data de publicação: | 2000 |
| País: | México |
| Recursos: | Universidad Nacional Autónoma de México |
| Repositório: | Redalyc-UNAM |
| OAI Identifier: | oai:redalyc.org:57217206 |
| Acesso em linha: | https://www.redalyc.org/articulo.oa?id=57217206 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Ciencias de la Tierra Mexico Michoacán Mineralogy La Hueca iron manganese deposit |
| Resumo: | In this work we describe for the first time the mineralogy and very briefly the possible origin of abanded Fe-Mn deposit associated with a Cretaceous volcanosedimentary sequence of the southern Guerreroterrane, near the sulfide massive volcanogenic deposit of La Minita. The deposit is confined within a felsictuff unit; about 10 meters thick where sampled for chemical analysis. Using XRF, EDS and XRD techniques,we found besides todorokite, cryptomelane, quartz, romanechite (psilomelane), birnessite, illite-muscovite,cristobalite, chlorite, barite, halloysite, woodruffite, nacrite or kaolinite, and possibly hollandite-ferrian, aswell as an amorphous material and two unknown manganese phases.Although the manganese and iron minerals that characterize the La Hueca site were apparentlysomewhat altered by diagenetic or weathering processes, the combined evidence of finely banded tolaminated structure, the abundant presence of Fe, Mn, Ba, Zn, and Si, and a mineralogy of probable primaryoriginm here represented by hematite, jasper and manganese minerals enriched in zinc and barium, stronglysupport the interpretation that La Hueca is essentially of sedimentary origin, precipitated fromhydrothermally metal-enriched solutions. The deposit is here interpreted as a distal exhalite derived from thesame hydrothermal solutions that formed the barite-sulfides deposits of La Minita. |
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