Ore Microscopy of the Boss-Bixby, Missouri Cobalt-Copper-Iron Ores


The Boss-Bixby deposit is one of several iron deposits that occur in the Precambrian igneous rocks of southeastern Missouri. It differs, however, from all of those deposits by its significant contents of copper, cobalt, and titanium, and its close relationship with a basic igneous intrusion. Ore microscopic study of selected drill core samples has shown that the hypogene ore minerals are magnetite, hematite, chalcopyrite, bornite, covellite, ilmenite, rutile, sphalerite, cobaltian pyrite, carrollite, scheelite, and wolframite. Subsequent partial oxidation has formed martite, pseudobrookite, and anatase. Textural evidence indicates that two stages of iron and iron-titanium oxide formation were followed by the deposition of the copper-iron sulfide minerals and carrollite.

Meeting Name

Annual Meeting of the Society of Mining Engineers of AIME (1985: Feb. 24-28, New York, NY)


Geosciences and Geological and Petroleum Engineering

Keywords and Phrases

Iron Deposits - Missouri; Rock - Microscopic Examination; Boss-Bixby Deposit; Cobalt-Copper-Iron Ores; Hypogene Ore Minerals; Precambrian Igneous Rocks; Sulfide Minerals; Ore Analysis

Document Type

Article - Conference proceedings

Document Version


File Type





© 1985 Society of Mining Engineers of AIME, All rights reserved.

Publication Date

01 Feb 1985

This document is currently not available here.