Predictive Mineralogy

Possible unrecorded species at Marazion Marsh, Ludgvan, Cornwall, England, UK

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
Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂	82.40%	Schorl (62.64 %), Stannite (52.91 %)
Galena	PbS	78.93%	Arsenopyrite (53.61 %), Chalcopyrite (51.07 %), Sphalerite (74.68 %), Stannite (76.84 %)
Pyrrhotite	Fe_1-xS	64.81%	Stannite (64.81 %)

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
12 : Hadean hydrothermal subsurface sulfide deposits (see also #33)	50
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12])	50
15 : Black/white smoker minerals and other seafloor hydrothermal minerals	45
40 : Regional metamorphism (greenschist, amphibolite, granulite facies)	20
34 : Complex granite pegmatites	16
19 : Granitic intrusive rocks	16
26 : Hadean detrital minerals	15
38 : Ophiolites	11
23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47)	10
37 : Layered igneous intrusions and related PGE minerals	7