Rare Earth Elements: Their Importance in Understanding Soil Genesis

Table 2

Instrumental neutron activation analysis of selected REEs in selected minerals.

Mineral	La	Ce	Nd	Sm	Eu	Tb	Yb	Lu
	mg/kg
Microcline	bdl	20	23	bdl	0.2	bdl	bdl	bdl
Oligoclase	bdl	27	49	bdl	1.7	1.1	0.6	0.17
Hornblend	5	7	31	3.2	0.7	bdl	1.2	0.05
Augite	36	39	57	4.4	0.4	1.3	5.1	1.25
Detection limit	1	3	10	0.5	0.2	0.5	0.5	0.05

bdl: below detection limit.
Unpublished analysis by instrumental neutron activation analysis by authors.