Predictive Mineralogy

Possible unrecorded species at St Kitts Phosphate Quarry, Truro, North Mt Lofty Ranges, Mt Lofty Ranges, South Australia, Australia

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	96.95%	Crandallite (50.29 %), Cyrilovite (58.82 %), Epidote (56.37 %), Fluellite (65.96 %)
Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂	88.74%	Cyrilovite (52.94 %), Fluellite (51.06 %), Montmorillonite (51.11 %)
Calcite	CaCO₃	76.84%	Epidote (51.60 %), Montmorillonite (52.16 %)
Strengite	FePO₄ · 2H₂O	51.47%	Cyrilovite (51.47 %)
Goethite	α-Fe³⁺O(OH)	50.00%	Cyrilovite (50.00 %)

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
47a : Low-𝑇 subaerial oxidative hydration, weathering (see also #16 and #23) - [Near-surface hydration of prior minerals] Unique: Halloysite	100
47c : Low-𝑇 subaerial oxidative hydration, weathering (see also #16 and #23) - [Carbonates, phosphates, borates, nitrates]	14
47g : Low-𝑇 subaerial oxidative hydration, weathering (see also #16 and #23) - [Halogen-bearing surface weathering minerals]	3
16 : Low-𝑇 aqueous alteration of Hadean subaerial lithologies (see also #23)	2
22 : Hydration and low-𝑇 subsurface aqueous alteration (see also #23)	2
6 : Secondary asteroid phases	1
40 : Regional metamorphism (greenschist, amphibolite, granulite facies)	1
34 : Complex granite pegmatites	1
24 : Authigenic minerals in terrestrial sediments (see also #17)	1
21 : Chemically precipitated carbonate, phosphate, iron formations	1
36 : Carbonatites, kimberlites, and related igneous rocks	1