Hydrothermal Alteration in 410 and 5060, Tongonan Geothermal Field, Leyte, Philippines

Abstract

Geology and hydrothermal alteration of the Tongonan geothermal field, Leyte, Philippines are This is followed by petrologic descriptions of the mineralogy from two deep wells, 506-D in the Malitbog sector and 410 in the Mahiao sector. Petrographic techniques were used to analyse cuttings and cores from the two drillholes. Identification of the mineralogy was through examination of hand specimens and thirty-five thin sections of core and cuttings. Fluid inclusion temperatures were measured from core in 506-D at 2648 m Information gained from these techniques has been correlated and used to inter - pret lithology, mineralogy, hydrothermal alteration and temperatures encountered in these two wells .