A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The “Alpalhao Granite” (Alentejo, Portugal) as a Potential Ornamental Stone
“Alpalhao granite”, also called SPI, is used as a high quality ornamental stone for interior and exterior applications. It is fine grained and equigranular, and has disseminated feldspar phenocrysts showing a homogeneous bluish grey colour. The SPI was mapped and scanlines (14) and drill cores (4) were carried out for lithofacies and joints characterization, besides petrographical study. Three of the 5 granite outcrops were studied regarding their potential for ornamental blocks exploitation (Carvalhal, Pinheiral and Ribeira de Sor). The Carvalhal area has generally no potential, due to intense fracturing and frequent heterogeneities except for drill core SCA1 area. The Pinheiral area has been exploited in all its extent, but still assures 368,800 m3 estimated resources of good granite at depth. Ribeira de Sor area presents a good potentiality for commercial blocks in the eastern zone and a limited potential in the western area due to subsurface fracturing and chromatic changes.
The “Alpalhao Granite” (Alentejo, Portugal) as a Potential Ornamental Stone
“Alpalhao granite”, also called SPI, is used as a high quality ornamental stone for interior and exterior applications. It is fine grained and equigranular, and has disseminated feldspar phenocrysts showing a homogeneous bluish grey colour. The SPI was mapped and scanlines (14) and drill cores (4) were carried out for lithofacies and joints characterization, besides petrographical study. Three of the 5 granite outcrops were studied regarding their potential for ornamental blocks exploitation (Carvalhal, Pinheiral and Ribeira de Sor). The Carvalhal area has generally no potential, due to intense fracturing and frequent heterogeneities except for drill core SCA1 area. The Pinheiral area has been exploited in all its extent, but still assures 368,800 m3 estimated resources of good granite at depth. Ribeira de Sor area presents a good potentiality for commercial blocks in the eastern zone and a limited potential in the western area due to subsurface fracturing and chromatic changes.
The “Alpalhao Granite” (Alentejo, Portugal) as a Potential Ornamental Stone
Lisboa, Jose V. (author) / Carvalho, Jorge M.F. (author) / Sardinha, Rui P. (author)
2013
11 Seiten
Conference paper
English
Granit , Betriebsmittel , Brechen , Bohrkern , graue Farbe , Portugal , Feldspat
The ``Alpalhao Granite'' (Alentejo, Portugal) as a Potential Ornamental Stone
| British Library Online Contents | 2013
Valerio Olgiati Villa Alem, Alentejo, Portugal
British Library Online Contents | 2015
Regional landscape plan for the Alentejo coastal area, Portugal
| British Library Conference Proceedings | 1995