Paleomagnetic determination of emplacement temperatures of pyroclastic deposits: an under-utilized tool

Inferred time- and temperature-dependent cation ordering in natural titanomagnetites

“…Our findings have important implications for the interpretation of rock magnetic and paleomagnetic data, and irreversible thermomagnetic behaviour similar to that observed here (T C,heating 4T C,cooling ) is not uncommon in the literature [40][41][42] . It is typically attributed to chemical alteration or is not discussed, and T C is frequently taken to be an intrinsic property directly linked to Ti content.…”

Rock Magnetic and Palaeomagnetic Analyses on Lithic Fragments From the Archaeological Site of Akrotiri, Santorini

“…A new secondary magnetization will thus be acquired during their cooling in the presence of the ambient Earth's magnetic field. This procedure produces two components of magnetization that can be isolated with progressive thermal demagnetization (Cioni et al, 2004;Paterson et al, 2010;Tema et al, 2013a;Zanella et al, 2015).…”

“…The bulk magnetic susceptibility of all specimens was measured at room temperature after each thermal demagnetization step in order to detect possible mineralogical changes during heating (Porreca et al, 2007;Paterson et al, 2010, Tema et al, 2013a. The obtained values have been normalized to the initial susceptibility measured before any thermal treatment and plotted versus temperature (Figure 3).…”

“…Since then, several studies used lithic clasts embedded in volcanic deposits to better understand their characteristics and estimate their deposition temperature (e.g. Downey and Tarling, 1984;McClelland and Druitt, 1989;McClelland et al, 1996;Bardot, 2000;Cioni et al, 2004;Zanella et al, 2007;Sulpizio et al, 2008;Paterson et al, 2010). In this study, standard palaeomagnetic techniques have been applied for first time on lithic clasts from the pumice fallout deposited inside the Akrotiri archaeological site in order to estimate the deposition temperature of the pyroclastic deposits and better understand their characteristics when interacting with human constructions.…”

Late bronze age pottery as indicator of the deposition temperatures of the Minoan pyroclastic products, Santorini, Greece.

“…This method has been thoroughly described by several authors (e.g. McClelland & Druitt, 1989;Zanella et al, 2007;Paterson et al 2010) while others analysed potential factors affecting the reliability of the emplacement temperature estimates using palaeomagnetic methods (Bardot & McClelland, 2000;Porreca et al, 2008;Lesti et al, 2011). …”