Proterozoic massive sulfide replacements in volcanic rocks at Jerome, Arizona

Autor:	G. W. H. Norman
Rok vydání:	1977
Předmět:	geography geography.geographical_feature_category Felsic Gabbro Proterozoic Archean Geochemistry Geology Volcanic rock Quartz-porphyry Geophysics Geochemistry and Petrology Economic Geology Thrust fault Mafic Petrology
Zdroj:	Economic Geology. 72:642-656
ISSN:	1554-0774 0361-0128
DOI:	10.2113/gsecongeo.72.4.642
Popis:	At Jerome, Arizona, mafic volcanics, felsic volcanics, and tuffaceous sedimentary rocks comparable to many Archean sequences in the Canadian Shield are folded into a northeast trending dome. The northern half of the dome is flexed sharply northwest and its eastern limb is thrust west and upward more than 3,000 feet. Proterozoic quartz porphyry dikes and bodies of irregular shape and gabbro sheets were emplaced in volcanic rocks and postdate part of the folding. Sulfides occur in the quartz porphyry and volcanic rocks and in the U.V.X. mine, along a thrust fault, which ends the eastern extension of gabbro and quartz porphyry sheets on the hanging-wall and the footwall sides, respectively, of the United Verde massive sulfide deposit. The relative ages and associations of sulfides, gabbro, and quartz porphyry are interpreted to imply derivation from a common magmatic source.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::864df27bf1f0eca86e712fdfa72456be https://doi.org/10.2113/gsecongeo.72.4.642 Zobrazit plný text záznamu