冰岛深部地热钻探3906_Armannsson.pdfVIP

Proceedings World Geothermal Congress 2010 Bali, Indonesia, 25-29 April 2010 IDDP. The Chemistry of the Krafla Geothermal System in Relation to the IDDP Well Halldór Ármannsson ÍSOR, Iceland Geosurvey. Grensásvegur 9, IS 108 Reykjavík, Iceland h@iaor.is Keywords: IDDP, Krafla, geochemistry, acid wells, 1. INTRODUCTION Iceland The Iceland Deep Drilling Project (IDDP) plans to drill 5 km into an active mid-ocean ridge hydrothermal system to ABSTRACT investigate its temperatures and pressures, its permeability The first IDDP well was drilled in Krafla in the first half of structure and the compositions of its fluids and rocks. into 2009. The drill rig hit magma at about 2100 m depth and an active mid-ocean ridge hydrothermal system to drilling was stopped. The well was designed to be drilled investigate its temperatures and pressures, its permeability into a high temperature hydrothermal system with the goal structure and the compositions of its fluids and rocks. The of finding a 400 – 600 °C hot superheated or supercritical Krafla high temperature geothermal system is located in fluid. The chemistry of the Krafla geothermal system at Northeastern Iceland (Figure 1). The geology of the area is shallower depths has been th