Haven't seen an analysis yet that has a credible breakdown of methods used.[/quote]
Credible breakdown of methods used in this case, Bob, is a combination of inductively coupled plasma (ICP) atomic absorption spectrophotometry and dust-on slide petrogrpahy with a neutral refractive index liquid. Added to that is x-ray diffraction.
"petalspar" was a bad error by the editor, Bob. It sahould have read 'feldspar' in the article, though I COULD give you approximate percentages of plagioclase and orthoclase (not much of the former, plenty of the latter).
I could wax boringly scientific and eloquent about the whole affair but choose not to.
Sum total, it takes an anionic surfactant (Calgon) to lift the dirt and a weak organic acid to dissolve the calcite.
So why are you being such an irascible curmudgeon today?
For me, it's simply the pressures of work deadlines.
Please forgive me.
Rue Morgue - '08, '09
Black Rock Beacon - '10, '12, '13, '14
(lux, veritas, lardum)
Bacon is forever.
Veni, vidi, pertudi. (We came, we saw, we DRILLED.) - BRC Division of Geology 2009-2014
I'm here until the serendipitous synchronicity is ubiquitous.