Predictive Mineralogy

Possible unrecorded species at Murphy Mine (Ophir Mine; Twin River Mine), Ophir, Twin River Mining District, Toiyabe Range, Nye County, Nevada, USA

This table is based on statistical analysis of other localities containing similar species to the ones found at this locality.

Possible missing species	Formula	Match %	Due to recorded presence of
Chalcopyrite	CuFeS₂	99.92%	Bornite (85.52 %), Galena (56.79 %), Proustite (61.70 %), Pyrargyrite (63.59 %), Pyrite (51.72 %), Silver (50.22 %), Sphalerite (63.80 %)
Acanthite	Ag₂S	78.02%	Proustite (55.52 %), Pyrargyrite (50.61 %)
Calcite	CaCO₃	54.30%	Proustite (54.30 %)

Key: Mineral matches key element mineralogy of deposit Key element(s) in mineral not listed for deposit (-20% score)

Predicting paragenetic modes of deposit

Green indicates almost certain match based on minerals unique to a certain deposit type. Yellow indicates a possibly poor match, but should not be entirely discounted. Scores > 100 indicate strong confidence.

Paragenetic Mode	Score
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) Unique: Proustite, Pyrargyrite	202
47g : Low-𝑇 subaerial oxidative hydration, weathering (see also #16 and #23) - [Halogen-bearing surface weathering minerals] Unique: Chlorargyrite	100
54 : Coal and other mine fire minerals (see also #51 and #56)	2
50 : Coal and/or oil shale minerals	2
37 : Layered igneous intrusions and related PGE minerals	2
36 : Carbonatites, kimberlites, and related igneous rocks	1
38 : Ophiolites	1
47h : Low-𝑇 subaerial oxidative hydration, weathering (see also #16 and #23) - [Near-surface oxidized, dehydrated minerals]	1
7 : Ultramafic igneous rocks	1
15 : Black/white smoker minerals and other seafloor hydrothermal minerals	0
12 : Hadean hydrothermal subsurface sulfide deposits (see also #33)	0
6 : Secondary asteroid phases	0