Table 1.

Summary of analysed samples and results

Sample numberPlace name; rock typeLocationMagmatic rimsInheritance
Latitude (°S)Longitude (°W)U–Pb age ±2σ (Ma)δ18O (‰)Initial εHfU–Pb age (Ma)δ18O (‰)Initial εHf
SLV-109López Lecube; granite38.13277862.708889258 ± 2*6.01–7.05−5.37 to −7.04
LES-118Calvo; granite40.32944468.440000250 ± 2*4.39–5.85−5.56 to −8.97
LES-122La Esperanza; rhyolite40.48638968.432500246 ± 2*5.14–6.65−7.34 to −8.66
LES-125La Esperanza; felsic dome40.36222268.415556264 ± 2*6.57–7.55−3.78 to −11.40
LES-119Prieto; granodiorite40.38055668.458056273 ± 2*5.97–7.32−2.86 to −4.62
NIY-010Navarrete; granite40.59250066.565000282 ± 3*4.83–6.464.71 to 1.70, −5.05c. 425–6308.05 (1 grain)−0.84 (1 grain)
c. 1050; 11506.39 (1 grain)9.78 (1 grain)
VAL-008Yaminué; granodioritec. 40.7800c. 67.1700251 ± 26.11–7.65−4.56 to −14.72
PAG-257Piedra del Águila; granite40.08722270.085278290 ± 3*7.36–8.40−3.96 to −5.25c. 880; 1810
MAC-128Puesto Quintulepu; granite41.77583370.298889282 ± 2*6.61–7.16−2.34 to −5.42c. 7458.17 (1 grain)4.56 (1 grain)
c. 1030
GAS-025Laguna del Toro; granodiorite42.35611169.863056294 ± 2*6.84–7.830.10 to −4.38c. 9606.71 (1 grain)2.95 (1 grain)
BOZ-1Boca de la Zanja; granite43.44222265.942500257 ± 2*6.21–7.68−5.50 to −7.18c. 51010.19 (1 grain)−5.14 (1 grain)
c. 10307.75 (1 grain)4.40 (1 grain)
CAT50-1905Tierra del Fuego; granodiorite52.66364168.612822254 ± 37.34–12.31−4.45 to −8.21c. 470
c. 520–540c. 8.15 (3 grains)c. −1.95 (3 grains)
c. 960
ME9-2025Tierra del Fuego; granodiorite52.81258368.719898258 ± 38.11 to 9.04−3.66 to −7.28c. 510–660c. 7.99 (2 grains)c. −3.4 (2 grains)
COR1-1757Tierra del Fuego; Granite52.78264568.690408254 ± 37.32 to 8.82−3.92 to −7.48c. 520–580c. 8.79 (3 grains)c. −0.62 (3 grains)

*Pankhurst et al. (2006).

  • Pankhurst et al. (2014).