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- GEOKEM aims at keeping at hand and referable to within seconds, a brief
description of the composition of all volcanic and igneous centres world-wide
(and some associated sediments) for which there is reasonable data, together
with a regional variation diagram as well as a multi-element fingerprint, REE,
metals, the alkaline earth trace elements (Zr, Nb, Sr, Rb, Y, Ba) and other
relevant diagrams for single centres. Short descriptions together with
fractionation diagrams, comparisons between the different types of basalt known
as ORB (Oceanic Ridge Basalt), NMORB, EMORB, OIB, IAB, CAB, (see Glossary for
terminology) and other fundamental magma types, graphic comparisons between
centres of similar and dissimilar type, and the primary basaltic parental magma
trends etc are all shown. It is continuously updated as new data comes to hand.
There are still omissions, diagrams not yet done etc due to lack of finance and
that ever scarce commodity, time. All data used has been identified by an
abbreviated reference, necessarily so, as it must fit in the width of a
computer plot. If any data used is missing a reference somewhere in the general
text, we welcome communications pointing this out. Completed references to all
published data are also to be found in the main databases PETDB and GEOROC and
sometimes we show copies of these. We show more than 240 illustrating pix but
these are very hard to come by for places we have not visited personally.
Website: http://geokem.com/
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