Predictive Mineralogy

Possible unrecorded species at Prae Quarry, Framura, La Spezia Province, Liguria, Italy

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
Magnetite	Fe²⁺Fe³⁺₂O₄	97.23%	Actinolite (53.38 %), Ilmenite (57.89 %), Lizardite (66.06 %), Pentlandite (58.50 %)
Pyrrhotite	Fe_1-xS	74.77%	Pentlandite (74.78 %)
Sphalerite	ZnS	60.45%	Chalcopyrite (50.66 %), Millerite (50.48 %)
Chromite	Fe²⁺Cr³⁺₂O₄	57.93%	Uvarovite (57.94 %)
Copper	Cu	53.09%	Pumpellyite-(Mg) (53.10 %)
Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂	52.79%	Albite (52.80 %)
Galena	PbS	40.85%	Chalcopyrite (51.07 %)

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) Unique: Pumpellyite-(Mg)	100
31 : Thermally altered carbonate, phosphate, and iron formations	14
38 : Ophiolites	6
13 : Hadean serpentinization	6
53 : Other minerals with taphonomic origins	3
47a : Low-𝑇 subaerial oxidative hydration, weathering (see also #16 and #23) - [Near-surface hydration of prior minerals]	3
47c : Low-𝑇 subaerial oxidative hydration, weathering (see also #16 and #23) - [Carbonates, phosphates, borates, nitrates]	3
39 : High-𝑃 metamorphism (blueschist, eclogite, ultrahigh 𝑃 facies)	2
16 : Low-𝑇 aqueous alteration of Hadean subaerial lithologies (see also #23)	2
6 : Secondary asteroid phases	1
26 : Hadean detrital minerals	1