A series of mineral crusts and speleothems currently forming in the abandoned tunnels and shafts of the Pb- Zn-As-Sb Argentiera mine (Sassari) have been sampled and analysed. Over 20 crystalline phases have been determined, among which many sulphates (barite, copiapite, epsomite, gypsum, jarosite, melanterite, metavoltine, and sideronatrite) and carbonates (aragonite, calcite, dypingite, giorgiosite, hydromagnesite, and hydrozincite). Also several oxides (hematite, akaganeite, and pseudoboleite), hydroxides (goethite, lepidocrocite, and todorokite) and silicates (quartz, illite, and feldspar) have been found. The most interesting mineral paragenesis (akaganeite, dypingite, giorgiosite, and hydromagnesite) has been discovered on a nail that has given both iron and magnesium necessary to their formation.
Minerali secondari in ambiente sotterraneo: la Miniera dell’Argentiera (Sardegna nord-occidentale).
DE WAELE, JO HILAIRE AGNES
2013
Abstract
A series of mineral crusts and speleothems currently forming in the abandoned tunnels and shafts of the Pb- Zn-As-Sb Argentiera mine (Sassari) have been sampled and analysed. Over 20 crystalline phases have been determined, among which many sulphates (barite, copiapite, epsomite, gypsum, jarosite, melanterite, metavoltine, and sideronatrite) and carbonates (aragonite, calcite, dypingite, giorgiosite, hydromagnesite, and hydrozincite). Also several oxides (hematite, akaganeite, and pseudoboleite), hydroxides (goethite, lepidocrocite, and todorokite) and silicates (quartz, illite, and feldspar) have been found. The most interesting mineral paragenesis (akaganeite, dypingite, giorgiosite, and hydromagnesite) has been discovered on a nail that has given both iron and magnesium necessary to their formation.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
