Back Forty

概述

Three stacked massive sulfide zones: East, South Limb and Tuff zones. Main Zone Hinge and Pinwheel Zone on adjacent MRT property are not included in resource. Semi-massive and stringer ores. Gold-rich gossan zone at surface. Menominee County. Reserves measured, indicated, inferred: 8.39 million t @ 0.44% Cu, 4.7% Zn, 0.3% Pb, 2.4 g/t Au, 29 t Ag, open along strike and depth. Indium grades average 150 ppm in zinc concentrates and 120 ppm in copper concentrates.

地质背景

构造环境: Siliciclastic-felsic in mature epicontinental arc

资源与开采

数据溯源

数据来源: USGS MRDS