Predictive Mineralogy

Possible unrecorded species at Unnamed Occurrence (ARDF - MF043; area near Fall Creek; Mudside Creek; Coal Creek; and upper Topsy Creek), Yakutat Mining District, Hoonah-Angoon Census Area, Alaska, USA

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
Quartz	SiO₂	87.41%	Powellite (61.54 %), Pyrite (67.27 %)
Scheelite	Ca(WO₄)	60.28%	Powellite (60.29 %)
Molybdenite	MoS₂	55.99%	Powellite (55.99 %)
Chalcopyrite	CuFeS₂	41.37%	Pyrite (51.72 %)

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
47h : Low-𝑇 subaerial oxidative hydration, weathering (see also #16 and #23) - [Near-surface oxidized, dehydrated minerals]	50
6 : Secondary asteroid phases	50
8 : Mafic igneous rocks	50
34 : Complex granite pegmatites	50
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12])	0
12 : Hadean hydrothermal subsurface sulfide deposits (see also #33)	0
15 : Black/white smoker minerals and other seafloor hydrothermal minerals	0
17 : Marine authigenic Hadean minerals (see also #24)	0
19 : Granitic intrusive rocks	0
23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47)	0