Mita is a moderate temperature geothermal system that was discovered in 1997 during gold exploration in south-eastern Guatemala. This system is associated with bimodal basaltrhyolite volcanism, and occurs alongside (and overlapping with) the Cerro Blanco 2 million ounce epithermal gold deposit. Four 1000-1500m deep slim holes were drilled in 2008-09 to confirm the nature of the deep reservoir. ...

Sado Island is floating offshore of Niigata on Sea of Japan. This island is 855km2 and composed of Ko-sado (Small Sado) and O-Sado (Large Sado), and both them are arranged in a direction of NNE-SSW. This arrangement are parallel to Kakuda-Yahiko Range, south of Niigata City in the main land. O-Sado has the highest peak of more than 1100 m (Kinpokusan: 1172m), and Ko-Sado of 600 m high peak (Dai...

Accurate and precise ages of large silicic eruptions are critical to calibrating the geologic timescale and gauging the tempo of changes in climate, biologic evolution, and magmatic processes throughout Earth history. The conventional approach to dating these eruptive products using the 40Ar/39Ar method is to fuse dozens of individual feldspar crystals. However, dispersion of fusion dates is co...