 | Runyon, Simone E., Nickerson, Phillip A., Seedorff, Eric, Barton, Mark D., Mazdab, Frank K., Lecumberri-Sánchez, Pilar, Steele-MacInnis, Matthew (2019) Sodic-Calcic Family of Alteration in Porphyry Systems of Arizona and Adjacent New Mexico. Economic Geology, 114 (4) 745-770 doi:10.5382/econgeo.4661 | Journal (article/letter/editorial) | | containing Na plagioclase (An10-An33)-Ca amphibole ± epidote are focused along granite cupolas near the base...sodic assemblages containing albite (An00-An09)-epidote-chlorite. Mineral composition and fluid inclusion...(360°–470°C+) than later, lower-temperature albite-epidote assemblages (>250°C). Calculated δD isotope compositions...commonly found in sodic alteration (e.g., chlorite, epidote), proximal propylitic assemblages are generally...petrographic analysis of inclusions hosted primarily in epidote, as well as some inclusions hosted in quartz. Microthermometry |  | | Report (volume) | | found in Paleozoic and Cenozoic orogenic-belt and island-arc settings and are associated with felsic to...(diopside-hedenbergite), wollastonite, chlorite, epidote, quartz, actinolite-tremolite, and (or) calcite...Eric Pier of Pegasus Gold Corporation; Larry Hillesland of West Introduction gold grade of 1 g/t or...Salsigne, France; Pamlico, Nevada; Red Cloud, Nevada; Island Copper, British Columbia; and others. Ertsberg...Au-skarn-related occurrences, Aubearing jasperoid mantles epidote-rich endoskam that formed at the contact of Cretaceous |  | | Report (issue) | | sericite, iron oxide, and scattered grains of epidote and zircon. Sedimentary structures described ...in all three, but calcite, scapolite, biotite, epidote, chlorite, amphiboles, plagioclase, and apatite... zircon, garnet, and locally clinozoisite and epidote. Tourmaline, garnet, zircon, quartz, and the...Muscovite, sericite, biotite, clinozoisite, and epidote are all of metamorphic origin. Opaque grains are...are scapolite, biotite, rauscovite, chlorite, epidote, amphiboles, orthopyroxene, and plagioclase. In |  | | Book | | Sillitoe, R.H., 1989, Gold deposits in western Pacific island arcs: The magmatic connection, in Keays, R.R.,...2010); and (3) accretion of exotic terranes, such as island arcs, microcontinental blocks, 6 COPPER PROVINCES...due to collision of the Melanesian intraoceanic island arc with the leading edge of the Australian craton...In contrast to contractional arcs, extensional island arcs, particularly intraoceanic arcs during their...Accretion of exotic terranes (microcontinents, island arcs, large oceanic plateaus), which may cause |
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