Predictive Mineralogy

Possible unrecorded species at Yugashima mine, Amagi-Yugashima, Shizuoka Prefecture, Japan

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	79.32%	Acanthite (62.06 %), Inesite (54.39 %), Johannsenite (72.04 %), Pyrite (51.72 %), Sphalerite (63.80 %)
Galena	PbS	79.11%	Acanthite (69.24 %), Inesite (54.39 %), Johannsenite (68.82 %), Sphalerite (74.68 %)
Rhodonite	CaMn₃Mn[Si₅O₁₅]	56.98%	Johannsenite (56.99 %)
Rhodochrosite	MnCO₃	56.14%	Inesite (56.14 %)
Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)	52.68%	Johannsenite (52.69 %)
Hematite	Fe₂O₃	50.87%	Inesite (50.88 %)
Silver	Ag	50.31%	Acanthite (50.32 %)

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
32 : Ba/Mn/Pb/Zn deposits, including metamorphic deposits Unique: Johannsenite	100
31 : Thermally altered carbonate, phosphate, and iron formations Unique: Xonotlite	100
22 : Hydration and low-𝑇 subsurface aqueous alteration (see also #23) Unique: Inesite	100
49 : Oxic cellular biomineralization (see also #44)	13
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12])	13
36 : Carbonatites, kimberlites, and related igneous rocks	0
26 : Hadean detrital minerals	0
38 : Ophiolites	0
12 : Hadean hydrothermal subsurface sulfide deposits (see also #33)	0
37 : Layered igneous intrusions and related PGE minerals	0
7 : Ultramafic igneous rocks	0
8 : Mafic igneous rocks	0
23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47)	0