ABSTRACT Geochemical data are generally derived from government and industry
geochemical surveys that cover areas at various spatial resolutions. These survey data are …

We take stock of the present position of compositional data analysis, of what has been
achieved in the last 20 years, and then make suggestions as to what may be sensible …

Applied geochemistry and environmental sciences invariably deal with compositional data.
Classically, the original or log-transformed absolute element concentrations are studied …

Most data in environmental sciences and geochemistry are compositional. Already the unit
used to report the data (eg, μg/l, mg/kg, wt%) implies that the analytical results for each …

This paper serves two goals. The first part shows how mass evolution processes of different
nature become undistinguishable once we take a size-limited, noisy sample of its …

Water chemistry is commonly investigated to determine the suitability of water for various
uses. With increased knowledge of aqueous chemistry, it has become possible to interpret …

A popular model proposed by WR Dickinson and co-workers in the early 1980s relates the
composition of sandstones to the plate-tectonic setting of the sedimentary basins in which …

Lecture Notes on Compositional Data Analysis Page 1 Pawlowsky-Glahn, V. Egozcue, JJ
Tolosana-Delgado, R. Lecture Notes on Compositional Data Analysis May 28, 2007 Page 2 …

DuPont analysis is a classical tool for assessing the determinants of financial performance of
firms. It is based on financial ratios comparing revenues with costs (the so-called margin …

Isometric log ratios of proportions of major ions, derived from intuitive sequential binary
partitions, are used to characterize hydrochemical variability within and between coal seam …