uniqsedimentary, metamorphic, granitic and volcanic rocks, but the pre-cenozoic . figure 4.1-1: bre-x1: (a) close up view of relict phenocrysts highly altered to . iron, magnesium, titanium, manganese, and calcium all show negative trends.porphyry copper deposit model - usgs publications repositorymanganese oxide in coexisting chlorite and epidote relative to lateral distance . from sedimentary wall rocks of the porphyry copper deposit . propylitic and intermediate argillic alteration many minerals present are relict or not newly formed.
geological classification of canadian gold deposits - semantic scholarsediment-hosted breccia ores; brewery creek mine, yukon territory. 68 . associated lead, zinc, copper±molybdenum, manganese, bis- . traces of relict bed-.exploration techniques for rare-element pegmatite in the bird .sediment hampered traditional geochemical prospecting and exploration based on . relict footwall aureole from a pegmatite that has since been eroded . amorphous manganese dioxide in b-horizon soil samples (clark,. 1993 and 1995a).
advances in botanical methods of prospecting for .iron, nickel, manganese, and a small amount of lead, but no cobalt or chromium. . relict stands of species that formerly had a wider range, or seeds of tolerant.