Using alteration halos to determine the mass of volatiles expelled and the rate of expulsion in a magmatic porphyry system with application to the porphyry copper system at butte, montana...and the size of intrusion required to supply them are key parameters in the formation of any magmatic-hydrothermal ore deposit that can be estimated from the morphology of the hydrothermally altered rock....
Scientific results from the deepened lopra-1 borehole, faroe islands: mineralogical and thermodynamic constraints on palaeogene palaeotemperature conditions during low-grade metamorphism of basaltic lavas recovered from the lopra-1/1a deep hole, faroe islands...minerals that are reported for the Lopra-1/1A well records progressive zeolite facies to prehnite–pumpellyite-facies mineral progressions consistent with those of other wellstudied hydrothermally altered rock sequences....
Environmental effects of hydrothermal alteration and historical mining on water and sediment quality in central colorado... Water, streambed sediment, and aquatic insects were collected from (1) catchments underlain by single lithogeochemical units, some of which were hydrothermally altered, that had not been prospected or mined; (2) catchments that contained evidence of prospecting, most of which contain hydrothermally altered rock, but no historical mining; and (3) catchments, all of which contain hydrothermally altered rock, where historical but now inactive mines occur....
Mechanisms of arsenic and lead release from hydrothermally altered rockThis paper describes the effects of pH, dissolved oxygen (DO), redox conditions, and mixing ratio of different rocks on the leaching behaviors of As and Pb from hydrothermally altered rock as well as the functional groups incorporating As and Pb in the rock....
