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Petrogenesis of Archean (2.7 Ga) Mafic Volcanic Assemblages Near Ely, MN
The Vermilion District in northeastern Minnesota contains one of the classic Neoarchean Archean granite-greenstone belt terranes in the United States that formed between 2722 Ma to ~2661 Ma. Crustal development during ...
Regional Geochemical Analysis of Lower Paleozoic Strata, Western Wisconsin
Lower Paleozoic clastic strata of western Wisconsin were deposited during a series of transgressive marine incursions into the mid-continent in Cambrian to Ordovician time. These strata consist of intercalated sandstone, ...
Petrography of the Suflide Ore Zones in the Lynne Zn-Cu-Pb Deposit, Oneida Co., Wisconsin
This study examines the sulfide mineralization of three of the ore zones within in the Lynne Zn-Cu-Pb deposit to determine how the mineralizing hydrothermal system formed and evolved over time. These sulfide mineral ores ...
U-Pb Geochronology of Felsic Plutons in Neoarchean Sturgeon Lake Greenstone Belt, Ontario, Canada
The emplacement of granitoid plutons in Archean granite-greenstone belt terranes can provide a more complete magmatic and deformational history than the volcanic and sedimentary rocks. Granitoid plutons in greenstone belts ...
Characterizing Felsic Volcanic Rocks of the Lynne Zn-Cu-Pb Deposit, Oneida Co. Wisconsin
The primary objective of this research was to describe the petrographic and geochemical characteristics of least-altered felsic volcaniclastic and coherent volcanic rocks that host Zn-Pb-Cu massive sulfides in the Lynne ...