Editing Garnierite (section)

==Geologic occurrence==
Light colored garnierite is an alteration of [[olivine]]-rich rock to a clay-like mineral poor in nickel, light green to bright green garnierite is a result of the leaching of manganese oxide, magnesium, nickel and iron from the original dark green garnierite, rich in nickel, which was deposited by groundwater.<ref name=Pecora/> This leads to a very common occurrence of garnierite as fracture fillings of millimeter to centimeter thick veins or as a fabric or coatings at the Falcondo mine in the Dominican Republic.<ref name=Proenza/><ref>{{cite journal|last1=Villanova-de-Benavent|first1=Cristina|last2=Proenza|first2=Joaquín A.|last3=Galí|first3=Salvador|last4=García-Casco|first4=Antonio|last5=Tauler|first5=Esperança|last6=Lewis|first6=John F.|last7=Longo|first7=Francisco|title=Garnierites and garnierites: Textures, mineralogy and geochemistry of garnierites in the Falcondo Ni-laterite deposit, Dominican Republic|journal=Ore Geology Reviews|date=2014|volume=58|pages=91–109|doi=10.1016/j.oregeorev.2013.10.008|hdl=2445/160419|s2cid=128481921 |hdl-access=free}}</ref> X-ray diffraction of samples from that mine show that garnierite veins include sepiolite-falcondoite and [[quartz]] ([[chrysoprase]], a green variety of quartz with a nickel content of less than 2 weight %).<ref name=Proenza/> [[Breccias]] found in faults at the Falcondo mine contain garnierite clasts cemented together by a secondary deposition of garnierite, which is evidence of syn-tectonic deposition of garnierite.<ref name=Proenza/> In the garnierite deposits near [[Riddle, Oregon]], garnierite is found as a weathering product of the underlying [[peridotite]], with the garnierite layer between {{convert|50|and|200|ft|abbr=on}} thick.<ref name=Pecora/>