RT Journal Article
T1 Moganite in the Chalcedony Varieties of Continental Cherts (Miocene, Madrid Basin, Spain)
A1 Bustillo Revuelta, María Ángeles
A1 Pérez Jiménez, José Luis
A1 Alonso-Zarza, Ana María
A1 Furió Vega, Marta
AB Varieties of chalcedony (calcedonite, quartzine, and lutecite) and other optical micro- and cryptocrystalline textures of quartz and opal from Miocene silcretes of the Madrid Basin were studied using a Thermo Fisher DXR Raman microscope. The microscope has a point-and-shoot Raman capability of 1 µm spatial resolution and was coupled with a standard optical microscope. Our results show that all the varieties of chalcedony can have a composite Raman spectrum of both quartz and moganite. The spectra are independent of the chalcedony origin by ageing, direct replacement, and cementation processes. Moganite was absent only in some calcedonite cements. The presence of moganite is independent of the surface sedimentary setting of the host rocks in which the silcretes are formed.
PB Taylor & Francis
SN 0038-7010
YR 2012
FD 2012-02
LK https://hdl.handle.net/20.500.14352/43332
UL https://hdl.handle.net/20.500.14352/43332
LA eng
NO Ministerio de Ciencia e Innovación
DS Docta Complutense
RD 3 may 2024