12. Mineral assemblages




	Figure 12-1. Franklin specimens showing gneissic ore textures. Left (Franklin Mineral Museum, unnumbered) is franklinite (black) with willemite (gray), tephroite (gray), and calcite (white). Right (privately owned) is franklinite (black), and willemite (gray); note the lenticular franklinite layer and compare with large-scale features in figure 9-5. Large specimen is 13 cm in maximum dimension. Photo by Vic Krantz.

Here are discussed some of the paragenetical and textural aspects of the zinc ore units and the calcium silicate units. This discussion also focuses on some of the chemically distinct groups and on special assemblages, hydrothermal veins, weathering and alteration occurrences, post-mining minerals, recrystallizations, exsolution textures, and giant crystals. Although these discussions are general, supporting detail is provided in the descriptive section for each species. The mineral descriptions and classification discussions of Palache (1935) are superb, and the reader is referred to these for supporting details and a different perspective. A very substantial amount of detailed information on specific Sterling Hill occurrences has been published in The Picking Table, much of it by Stephen Sanford and John Kolic.

The minerals of the Franklin Marble, the pegmatite bodies, the magnetite deposits, and the Kittatinny Limestone are discussed herein in the section entitled “Regional and local geology of the Franklin-Sterling Hill area.”

FOOTER LBI




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