Zobrazeno 1 - 10
of 26
pro vyhledávání: '"D. G. Brookins"'
Autor:
D. G. Brookins
There is an extremely voluminous literature on radioactive waste and its disposal, much in the form of government-sponsored research reports. To wade through this mountain of literature is indeed a tedious task, and it is safe to speculate that very
Autor:
H. Meixner, H. Wieseneder, R. Gutdeutsch, A. Preisinger, J. Zemann, A. Maucher, E. Froese, E. J�ger, K. Keil, D. G. Brookins
Publikováno v:
TMPM Tschermaks Mineralogische und Petrographische Mitteilungen. 21:52-60
Autor:
D. G. Brookins
Publikováno v:
Economic Geology. 71:944-948
In the Grants Mineral Belt (N. Mex.) are found accumulations of reduced U(IV) as coffinite and/or uraninite, not only in the immediate proximity of the hematite--pyrite redox interface but in the oxidized hematitic rocks upgradient from the interface
Autor:
H. O. A. Meyer, D. G. Brookins
Publikováno v:
Geophysical Research Letters. 1:269-272
The kimberlites of Riley County, Kansas contain xenoliths of upper mantle and crustal rocks. The kimberlite probably originated below the Low Velocity Zone (LVZ). Deep seated xenoliths include ilmenite-pyroxene symplectites, lherzolite, and eclogite.
Autor:
A. Albrecht, D. G. Brookins
Publikováno v:
Geofísica Internacional. 28:813-850
El borde sur del craton de Norteamérica está situado en el norte de México, pero no puede ser localizado con exactitud por la falta de afloramientos del basamento. Este trabajo investiga la química de la gruesa cubierta de 1000 m de rocas ígneas
Autor:
P. M. Hurley, D. G. Brookins
Publikováno v:
American Journal of Science. 263:1-16
Autor:
D. G. Brookins
Publikováno v:
Economic Geology. 67:369-372
Autor:
D. G. Brookins, C. M. Spooner
Publikováno v:
The Journal of Geology. 78:570-576
Previously reported K-Ar dates on biotites from the Oak Point rapakivi granite range from 343 m.y. to 354 m.y., and a K-feldspar has been dated by the same method at 264 m.y. Previous biotite determinations from the Stonington rapakivi granite yield
Autor:
D. G. Brookins
Publikováno v:
Mineralium Deposita. 17
Clay mineralogy studies of ore rocks versus barren rocks in the Grants mineral belt, New Mexico, show that some combination of chlorite (rosette form), illite, mixed-layer illite-montmorillonite, (±Mg-montmorillonite) are penecontemporaneous with ur
Autor:
D. G. Brookins
Publikováno v:
AAPG Bulletin. 60
A calculated 426-m.y. K-Ar date on glauconite has been reported for the basal section of Niagaran (Silurian) rocks from Hamilton, Ontario. This date was derived by assuming a 10-percent radiogenic 40Ar loss for the measured date of 384 ± 11 m.y. The