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- W159409780 abstract "Spain is the most self-sufficient country for minerals in theEsU. A major proportion of these Spanish mineral resources hasbeen oblained from Tertiary material-. The main material exploited in Tertiary basins have been: brown coal and lignites, potassium salts, sodium salts (sulphates and chlorides), diatomite,sepiolite and other absorbent days, bentonites, celestine. pumice and also dimension (building) stones and ceramics, portlandcement and plaster raw materials.Pb-Zn-Ag and gold alunite volcanogenic ores, related to Neogenevolcanism, besides Au-placers have been mined from Romantimes, Minor Cu and Mn occurrences are also reviewed.The brown coal mines of Galician basins have provided all thesignificant production of Spain: more than 17 Mt. Low-quailityOligocene lignites in the eastern part of the Ebro Basin and BalearicIslands are less important from tbe economic point of view. Otheroccurrences are in the Guinzo de Limia. Guadix Baza. Granada(Arenas del Rey) and Alcoy basins.The Spanish Tertiary basins (continental and marine, (Oligocene-Miocene) are filled by thick evaporites in which are obtainedpotassium salts and sodium salts (sulphates and chlorides). TheMontevives celestine mine is located in the evaporitic unit of theGranada basin (Miocene), and provides all of the Spanish celestineproduction. Spain is the world's third largest producer of celestine.The Madrid basin and the minor Calatayud basin supply thewhole of Spanish sepiolitic production. The most important Spanishattapulgite production is obtained from the El Cuervo mine (Sevillaand Cadiz provinces). The genesis of the Cabo de Gata bentonitedeposits is thought to be by hydrothermal alteration and halmyrolsisof Neogene volcanic roch. The Madrid basin bentonites and'pink days' have been interpreted as an early diagenetic. evenedaphic Mg-rich, attapulgitization of illite clays. The most importantareas of ceramic c1ay production in Spain are localed in theGuadalquivir basin (Bailen area) and the Madrid basin, (La SagraAlcala de Henares).The continental Neogene basin ofthe Hellin area supplies 90 % of Spanish diamote production." @default.
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- W159409780 date "1996-01-26" @default.
- W159409780 modified "2023-10-04" @default.
- W159409780 title "Mineral resources of the Tertiary deposits of Spain" @default.
- W159409780 doi "https://doi.org/10.1017/cbo9780511524851.009" @default.
- W159409780 hasPublicationYear "1996" @default.
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