Samples containing abundant noncarbonate minerals were crushed to particles 20% iron- bearing minerals (exclusive of unweathered pyrite) they were subjected to magnetic separation, using a Frantz-type electromagnetic separator and the procedures outlined by Dow (1965) and Stone (1987), to separate phosphatic minerals from nonphosphatic, predominantly iron-bearing, minerals.
(Samples; containing; abundant noncarbonate minerals) (Samples containing abundant noncarbonate minerals; were crushed; to particles) (they; were subjected; to magnetic separation) (the procedures; outlined; by Dow (1965) and Stone (1987)
Samples Samples containing abundant noncarbonate minerals they the procedures
containing were crushed were subjected outlined
abundant noncarbonate minerals
to particles
to magnetic separation
by Dow (1965) and Stone (1987