Identifying minerals controlling the chemical evolution of igneous rocks: Beyond Pearce element-ratio diagrams

Details Identifying minerals controlling the chemical evolution of igneous rocks: Beyond Pearce element-ratio diagrams Identifying minerals controlling the chemical evolution of igneous rocks: Beyond Pearce element-ratio diagrams

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994gecoa..58.5479w&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 58, Issue 24, pp.5479-5487

Computer Science

1

Scientific paper

A new method for identifying mineral controls on the chemical evolution of magmas has statistical power and interpretative reliability exceeding those of the conserved-denominator method. Conserved denominator (or "Pearce element-ratio") analysis compares two chemical variables that have each been divided by the same third chemical variable. The common divisor introduces "induced correlations" that tend to reduce statistical power--the method tends to assert the presence of mineral controls where none exist. No available method can remove or even quantify the effects of these induced correlations. By recasting chemical data into a new form, standard regression analysis serves to evaluate the same geochemical hypotheses, evaluated by common-denominator analysis. This new approach devolves from simple geometric relationships among compositional variables, is consistent with a linear mixing paradigm, and does not introduce induced correlations. Furthermore, tests for co-control by minerals with common cations (e.g., olivine and orthopyroxene) are easily formulated with this new method. Case studies involving olivine and olivine + plagioclase control, as well as synthetic-data studies, illustrate and verify this new method.

Affiliated with

Also associated with

No associations

Rating

Identifying minerals controlling the chemical evolution of igneous rocks: Beyond Pearce element-ratio diagrams does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Identifying minerals controlling the chemical evolution of igneous rocks: Beyond Pearce element-ratio diagrams, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Identifying minerals controlling the chemical evolution of igneous rocks: Beyond Pearce element-ratio diagrams will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1408369