Comparison of petrographic and petrophysical properties of three sculptural fragments to determine their belonging to the sepulcher of Nuno Freire de Andrade II (XIV century)
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Abstract
Three fragments of stone representing a head, a body and a sarcophagus lid, and attributed to the grave of Nuno Freire de Andrade II, Grand Master of the Order of Christ (fourteenth century), were analysed to determine their petrographic, ultrasonic P-wave pulse velocity, and colour properties. The results indicate that the stones correspond to three lithological types (ortogneis, granodiorite and leucogranite) with different ultrasonic P-wave pulse velocity, colour and colour variation between dry and wet. From these data it is inferred that none of the three fragments have been part of the same sarcophagus lid, since the granite lids of medieval Galician sarcophagus were carved in a single block of stone.
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