RT Journal Article
T1 Los depósitos de Mn-Al-Fe de la cueva de Lazalday (Zarate, Alava): composición química y mineralogía
T1 Mn-Al-Fe deposists of Lazalday cave (Zarate, Alava): chemical composition and mineralogy
A1 Yusta, Iñaki
A1 Castellano, Amaia
A1 Aranburu Artano, Arantza
A1 Velasco, Francisco
AB Lazalday Cave is a 4 km long karstic cave where Mn deposits occur as black thin coatings coveringwalls and cementing conglomerates, inside calcite speleothems, and also in the floor of many passagesalternating with Al-Si white gels. Fe-rich deposits are found forming black stalactites and microgours.Asbolane, allophane, hydrated halloysite, goethite, ferrihydrite and X-ray amorphous phases composerespectively the Mn-Al and Fe deposits. High metal contents of 21.5% MnO, 5.1% Zn, 2.5% Ni, 0.9% Co,and 0.2% Cu were recorded in Mn-rich levels. Allophane and Fe deposits also trap heavy metals, but inlower proportions. The presence of abundant gypsum, hydrated halloysite and jarosite point out an acidicalteration from pyrite-bearing rocks. Potential metal source rocks are discussed
YR 2009
FD 2009
LK http://hdl.handle.net/10272/7978
UL http://hdl.handle.net/10272/7978
LA spa
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026