Publication: Geology and gravity modeling of the Logrosán Sn-(W) ore deposits (Central Iberian Zone, Spain)
Loading...
Full text at PDC
Publication Date
2015-03
Authors
Chicharro Álvarez, Eva
Martín Crespo, Tomás
Gómez Ortiz, David
Oyarzun, Roberto
Advisors (or tutors)
Editors
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier Science B.V., Amsterdam
Citations
Exportar
Abstract
Abstract Sn–(W) granite-hosted ore deposits are characterized by the occurrence of pegmatites, stockworks and quartz veins within a granitic cupola and its surrounding host-rocks. A regional exploration tool for these deposits consists of targeting syn- to late-orogenic specialized S-type hidden shallow granites by geophysical methods. However, gravity as a tool for “brownfield type” exploration in a mature granite-related ore setting has not been widely used. The Logrosan area (Central Iberian Zone) provides a perfect case scenario with Sn–W endo- and exogranitic ore deposits within a relatively small-scale realm. We suggest that the understanding of the subsurface of the Logrosan area provides a key tool to develop a more comprehensive geological and metallogenic model for the ore deposits. In addition, a better explanation for the mineral evolution and the Sn–W ore precipitation can be achieved, by comparing the chemical and textural features of ores from several of the Logrosan deposits. Field gravity and geologic data allowed the modeling of the hidden granite bodies. Combining this information with detailed mineralogical, geochemical data and ore deposit modeling has allowed a definition of targets for probable new Sn–(W) deposits, all within a few kilometers of the main intrusion center.