Predictive Mineralogy

Possible unrecorded species at Les Ponts-Tarrets, Le Breuil, Villefranche-sur-Saône, Rhône, 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
Pyrite	FeS₂	91.93%	Actinolite (62.14 %), Calcite (51.16 %), Epidote (56.37 %)
Chalcopyrite	CuFeS₂	41.80%	Actinolite (52.26 %)

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
40 : Regional metamorphism (greenschist, amphibolite, granulite facies)	50
38 : Ophiolites	43
13 : Hadean serpentinization	43
23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47)	12
31 : Thermally altered carbonate, phosphate, and iron formations	10
16 : Low-𝑇 aqueous alteration of Hadean subaerial lithologies (see also #23)	10
24 : Authigenic minerals in terrestrial sediments (see also #17)	8
39 : High-𝑃 metamorphism (blueschist, eclogite, ultrahigh 𝑃 facies)	8
43 : Shear-induced minerals (including mylonite/slickensides)	5
22 : Hydration and low-𝑇 subsurface aqueous alteration (see also #23)	4