Predictive Mineralogy

Possible unrecorded species at Belmont-l'Estaing, Saint-Privat-du-Dragon, Brioude, Haute-Loire, Auvergne-Rhône-Alpes, France

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	99.99%	Arsenopyrite (61.33 %), Boulangerite (72.29 %), Bournonite (77.39 %), Covellite (85.83 %), Galena (56.79 %), Geocronite (67.52 %), Pyrite (51.72 %), Pyrrhotite (76.22 %), Sphalerite (63.80 %)
Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂	62.63%	Schorl (62.64 %)
Malachite	Cu₂(CO₃)(OH)₂	54.65%	Covellite (54.66 %)
Chalcocite	Cu₂S	50.30%	Covellite (50.30 %)

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: Boulangerite, Bournonite	100
12 : Hadean hydrothermal subsurface sulfide deposits (see also #33)	6
40 : Regional metamorphism (greenschist, amphibolite, granulite facies)	1
47h : Low-𝑇 subaerial oxidative hydration, weathering (see also #16 and #23) - [Near-surface oxidized, dehydrated minerals]	1
57 : Other minerals formed by human processes	1
45b : Oxidized fumarolic minerals (see also [#11]) - [Other oxidized fumarolic minerals]	1
26 : Hadean detrital minerals	1
47c : Low-𝑇 subaerial oxidative hydration, weathering (see also #16 and #23) - [Carbonates, phosphates, borates, nitrates]	1
34 : Complex granite pegmatites	1
19 : Granitic intrusive rocks	1
38 : Ophiolites	1