Boundaries for tectonic provenance fields are from Dickinson and Suczek (1979), Dickinson et al. Q = total quartz F = total feldspar L = unstable lithic fragments Q m = monocrystalline quartz P = plagioclase K = potassium feldspar Q p = polycrystalline quartz L v = volcanic-rock fragments L sm = sedimentary-rock and metasedimentary-rock fragments L m = metamorphic-rock fragments. Ternary diagrams showing a comparison among mean detrital modes for sand deposits from the Leg 168 study area (from Saettler, 1998), Site 174 of the DSDP (from Marsaglia and Ingersoll, 1992), and Site 177 of the DSDP (from Gergen and Ingersoll, 1986). dbr:Feldspar dbr:Folkclassification dbr:Craton dbr:Ternaryplot dbc:Petrology. Boundaries for tectonic provenance fields are from Dickinson and Suczek (1979), Dickinson et al. Consider the Feldspar data, change several settings to observe their effect. A QFL diagram or QFL triangle is a type of ternary diagram that shows. In general, a mineral structure will accept a mixture of cations if the cations have the same charge OR are about the same size. Range of feldspar compositions found in nature determined by the sizes and charges on Na, Ca, K. Q = total quartz F = total feldspar L = unstable lithic fragments Qm = monocrystalline quartz P = plagioclase K = potassium feldspar Qp = polycrystalline quartz Lv = volcanic-rock fragments Lsm = sedimentary-rock and metasedimentary-rock fragments L m = metamorphic-rock fragments. The charts produced from this method of graphing are generally referred to as 'ternary plots' or 'ternary diagrams. Stable compositional range as a function of P and T defined by nature and experiments: triangular diagram.

Feldspar ternary diagram