Mackinawite

Base metal-tin association(f)

Maghaemite

Ilmenite and magnetite in basalts and dolerites(a,b)

Magnetite

Polishing characteristics and problems(a,f)

Adventitiously introduced metals and grinding grit, dried immersion oil and amalgam(a)

Ilmenite and magnetite in basalts and dolerites(a-f)

Altered iron-titanium oxides in alkali olivine basalt(a,b,e)

Chromite associations(f)

Sulphides within ultramafic rocks in ophiolites(a)

Magmatic nickel ores(f)

Magmatic sulphide ores(f)

Magmatic sulphides(d,f)

Carbonatites(b-d)

Unmineralized intermediate rocks(a,b,d)

Slightly mineralized granites(f)

Porphyry copper ores(c)

Porphyry copper and molybdenum ores(f)

Massive sulphides in ophiolites(c)

Oxide placer deposits(a)

Manganese minerals(c-f)

Iron formations and bauxite(a-c)

Metamorphosed sulphides(f)

Appalachian metamorphosed sulphides(b,f)

Skarns( b-f)

Malachite

Supergene alteration (f)

Clastic-hosted copper ores(c)

Skarns(c)

Martite

Unmineralized sandstones(a,b,e)

Oxide placer deposits(a)

Iron formations and bauxite(d)

Maucherite

Silver-nickel-cobalt-arsenic-bismuth±uranium. The five metals association.(c-e)

Millerite

Sulphides within ultramafic rocks in ophiolites(b,d-f)

Nickel-rich assemblages within Mississippi Valley-style mineralization(c,d)

Molybdenite

Slightly mineralized granites(d,f)

Minor sulphide mineralization in granite(d,e)

Porphyry copper ores(e)

Porphyry copper and molybdenum ores(d-f)

Porphyry-style tin-tungsten-molybdenum ores(c-e)

Monazite

Mississippi Valley-style lead-zinc deposits(f)