Predictive Mineralogy

Possible unrecorded species at Mont Denise, Espaly-Saint-Marcel, Le Puy-en-Velay, 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
Pyrite	FeS₂	88.50%	Calcite (51.16 %), Hematite (50.17 %), Rutile (52.79 %)
Analcime	Na(AlSi₂O₆) · H₂O	71.42%	Chayesite (71.43 %)
Ilmenite	Fe²⁺TiO₃	71.42%	Chayesite (71.43 %)
Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂	71.42%	Chayesite (71.43 %)
Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂	52.79%	Albite (52.80 %)
Enstatite	Mg₂Si₂O₆	51.51%	Roedderite (51.52 %)
Spinel	MgAl₂O₄	51.51%	Roedderite (51.52 %)

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
35 : Ultra-alkali and agpaitic igneous rocks Unique: Chayesite	100
20 : Acidic volcanic rocks	13
31 : Thermally altered carbonate, phosphate, and iron formations	13
26 : Hadean detrital minerals	5
40 : Regional metamorphism (greenschist, amphibolite, granulite facies)	3
6 : Secondary asteroid phases	3
36 : Carbonatites, kimberlites, and related igneous rocks	2
5 : Primary asteroid phases	2
50 : Coal and/or oil shale minerals	2
54 : Coal and other mine fire minerals (see also #51 and #56)	2
4 : Primary chondrule phases	2