Predictive Mineralogy

Possible unrecorded species at La Facciata Quarry, Torano quarrying basin, Carrara, Massa-Carrara Province, Tuscany, 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
Chalcopyrite	CuFeS₂	99.99%	Azurite (65.18 %), Boulangerite (72.29 %), Bournonite (77.39 %), Chalcophyllite (75.56 %), Claraite (79.59 %), Colusite (74.31 %), Enargite (73.08 %), Galena (56.79 %), Geocronite (67.52 %), Hydrozincite (53.50 %), Malachite (60.66 %), Pyrite (51.72 %), Sphalerite (63.80 %), Sulvanite (54.10 %), Tyrolite (66.20 %), Vaesite (76.38 %), Wurtzite (63.86 %)
Cerussite	PbCO₃	95.54%	Claraite (59.18 %), Hydrozincite (67.25 %), Zaccagnaite (66.67 %)
Brochantite	Cu₄(SO₄)(OH)₆	88.57%	Chalcophyllite (68.89 %), Claraite (63.27 %)
Aragonite	CaCO₃	87.75%	Claraite (63.27 %), Zaccagnaite (66.67 %)
Cuprite	Cu₂O	85.66%	Chalcophyllite (64.89 %), Claraite (59.18 %)
Arsenopyrite	FeAsS	84.28%	Boulangerite (64.45 %), Bournonite (55.79 %)
Smithsonite	ZnCO₃	83.14%	Hydrozincite (62.08 %), Zaccagnaite (55.56 %)
Covellite	CuS	79.62%	Colusite (54.17 %), Zaccagnaite (55.56 %)
Baryte	BaSO₄	78.62%	Chalcophyllite (51.11 %), Claraite (65.31 %), Strontianite (51.49 %), Sulvanite (55.74 %), Tyrolite (52.96 %)
Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂	77.38%	Albite (52.80 %), Colusite (52.08 %)
Olivenite	Cu₂(AsO₄)(OH)	76.48%	Chalcophyllite (52.00 %), Claraite (51.02 %)
Mimetite	Pb₅(AsO₄)₃Cl	62.58%	Claraite (51.02 %), Zaccagnaite (55.56 %)
Bornite	Cu₅FeS₄	61.80%	Colusite (61.81 %)
Theisite	Cu₅Zn₅(AsO₄,SbO₄)₂(OH)₁₄	59.18%	Claraite (59.18 %)
Millerite	NiS	55.90%	Vaesite (55.91 %)
Fraipontite	(Zn,Al)₃((Si,Al)₂O₅)(OH)₄	55.55%	Zaccagnaite (55.56 %)
Hematite	Fe₂O₃	55.55%	Zaccagnaite (55.56 %)
Hemimorphite	Zn₄Si₂O₇(OH)₂ · H₂O	52.66%	Hydrozincite (52.67 %)
Copper	Cu	51.55%	Chalcophyllite (51.56 %)
Aurichalcite	(Zn,Cu)₅(CO₃)₂(OH)₆	51.02%	Claraite (51.02 %)

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, Colusite, Enargite, Sulvanite	500
47a : Low-𝑇 subaerial oxidative hydration, weathering (see also #16 and #23) - [Near-surface hydration of prior minerals] Unique: Halloysite	124
12 : Hadean hydrothermal subsurface sulfide deposits (see also #33) Unique: Vaesite	110
23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47) Unique: Zaccagnaite	100
47c : Low-𝑇 subaerial oxidative hydration, weathering (see also #16 and #23) - [Carbonates, phosphates, borates, nitrates]	26
53 : Other minerals with taphonomic origins	7
47d : Low-𝑇 subaerial oxidative hydration, weathering (see also #16 and #23) - [Arsenates, antimonates, selenates, bismuthinates]	7
47b : Low-𝑇 subaerial oxidative hydration, weathering (see also #16 and #23) - [Sulfates and sulfites]	5
50 : Coal and/or oil shale minerals	4
48 : Soil leaching zone minerals	4
22 : Hydration and low-𝑇 subsurface aqueous alteration (see also #23)	4
36 : Carbonatites, kimberlites, and related igneous rocks	2
40 : Regional metamorphism (greenschist, amphibolite, granulite facies)	2
55 : Anthropogenic mine minerals	2