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Predictive Mineralogy

Possible unrecorded species at Earl Township, Lancaster County, Pennsylvania, USA

This table is based on statistical analysis of other localities containing similar species to the ones found at this locality.

Possible missing speciesFormulaMatch %Due to recorded presence of
QuartzSiO299.92%Baryte (60.21 %), Calcite (62.43 %), Chalcopyrite (67.26 %), Fluorite (66.12 %), Goethite (66.86 %), Hematite (62.61 %), Malachite (61.21 %)
PyriteFeS299.37%Baryte (50.79 %), Calcite (51.16 %), Chalcopyrite (75.16 %), Goethite (55.41 %), Hematite (50.17 %), Malachite (52.79 %)
GalenaPbS40.85%Chalcopyrite (51.07 %)
SphaleriteZnS40.53%Chalcopyrite (50.66 %)

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 ModeScore
53 : Other minerals with taphonomic origins50
47a : Low-𝑇 subaerial oxidative hydration, weathering (see also #16 and #23) - [Near-surface hydration of prior minerals]49
47c : Low-𝑇 subaerial oxidative hydration, weathering (see also #16 and #23) - [Carbonates, phosphates, borates, nitrates]48
17 : Marine authigenic Hadean minerals (see also #24)4
14 : Hot springs, geysers, and other subaerial geothermal minerals4
24 : Authigenic minerals in terrestrial sediments (see also #17)3
35 : Ultra-alkali and agpaitic igneous rocks3
25 : Evaporites (prebiotic)3
8 : Mafic igneous rocks3
49 : Oxic cellular biomineralization (see also #44)3