Neutron activation-induced beta autoradiography as a technique for locating minor phases in thin section; application to rare earth element and platinum-group element mineral analysis

1984 ◽  
Vol 79 (4) ◽  
pp. 738-747 ◽  
Author(s):  
Philip J. Potts
Keyword(s):  
Rare Earth ◽  
Neutron Activation ◽  
Thin Section ◽  
Rare Earth Element ◽  
Platinum Group Element ◽  
Earth Element ◽  
Group Element ◽  
Mineral Analysis ◽  
Platinum Group

Rare earth element patterns of carbonado and yakutite: evidence for their crustal origin

1993 ◽  
Vol 57 (389) ◽  
pp. 607-611 ◽  
Author(s):  
Ken Shibata ◽  
Hikari Kamioka ◽  
Felix V. Kaminsky ◽  
Vassili I. Koptil ◽  
Darcy P. Svisero
Keyword(s):  
Trace Elements ◽  
Rare Earth ◽  
Neutron Activation ◽  
Rare Earth Element ◽  
Earth Element ◽  
Meteorite Impact ◽  
Abundance Patterns ◽  
Eu Anomaly ◽  
Crustal Origin ◽  
Monocrystalline Diamond

AbstractCarbonado and yakutite are both porous aggregates of polycrystalline micrometre-size diamond, with very different characters from those of monocrystalline diamond. The genesis of carbonado is very controversial, whereas yakutite is thought to have been formed by meteorite impact. Neutron activation analyses of trace elements in carbonado and yakutite indicate that their rare earth element (REE) abundance patterns have common characteristics: heavy REEs are not much depleted and a negative Eu anomaly is observed. These patterns are quite different from those of kimberlite and monocrystalline diamond and are similar to those of crustal materials such as shale, supporting the hypothesis of a crustal origin for carbonado and yakutite.

Rare earth element patterns in lake sediments as studied by neutron activation analysis

2003 ◽  
Vol 258 (3) ◽  
pp. 531-535 ◽  
Author(s):  
S. M. B. Oliveira ◽  
F. E. Larizzatti ◽  
D. I. T. Fávaro ◽  
S. R. D. Moreira ◽  
B. P. Mazzilli ◽  
...  
Keyword(s):  
Rare Earth ◽  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Lake Sediments ◽  
Rare Earth Element ◽  
Earth Element
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