Results 241 to 250 of about 4,877,471 (257)

U-Pb geochronology of grossular-andradite garnet

Chemical Geology, 2017
Abstract This study presents a new laser ablation-inductively coupled plasma mass spectrometry (LA-ICPMS) based U-Pb geochronometric method for dating grossular-andradite (grandite) garnet. Grandite is a primary skarn mineral, therefore dating its growth directly dates hydrothermal activity.
S. Seman, D.F. Stockli, N.M. McLean
openaire   +1 more source

?????????????????? (U-Pb ???? ??????????????????) ?????? ???? ???????????????????? ?????????????????? ?????????????????????? ???????????? ?? ?????????? ???????? ?????????????????????? (????????????????-???????????????? ?????????? ???????????????????????? ????????)

2014
???????????????? ???????????????????? U-Pb ???? ???????????????? ?????????????????? ??????????????????, ???? ?????????????????????????? ?? ???????????? ??. ?????????? ?? ?????????????????? ???????? ???? ?????????????????????? ????????????. ??????????????????????, ???? ???? ???????????? ???????????????????????????????? 1996 ?? 13 ?????? ????. ????????, ?
openaire   +3 more sources

Paragenesis and U-Pb systematics of baddeleyite (ZrO2)

Chemical Geology, 1993
The mineral baddeleyite (ZrO2) occurs in many terrestrial and lunar samples and some achondrite meteorites as a trace constituent that most often crystallizes in the late-stage, most chemically fractionated portions of mafic magmas together with apatite, ilmenite, ± zircon, ± zirconolite.
L.M. Heaman, A.N. LeCheminant
openaire   +1 more source

U–Pb SHRIMP dating of uraniferous opals

Chemical Geology, 2006
Abstract U–Pb and U-series analyses of four U-rich opal samples using sensitive high-resolution ion microprobe (SHRIMP) demonstrate the potential of this technique for the dating of opals with ages ranging from several tens of thousand years to millions of years.
Nemchin, Alexander, Neymark, L., Simons, S.   +2 more
openaire   +2 more sources

U-Pb ?????????????? ?????????????????????????????????? ???????????????? ???????????????????????? ?????????????? ???????????????????????????? ?????????? (???????????????????????????????????????? ???????????????? ?????????????????????? ????????)

2017
It is determined, that two-feldspar granites of the Vishnevoe massif of the Slavgorod block are the most ancient crustal granites in the Middle-Dnieper granite-greenstone terrane. Their isotopic age for monazite ??? 2985 Ma. They are close in age with enderbites of the Slavgorod complex (3014 ?? 7 Ma) and granodiorites of the Dnieper complex (2972 ?? 6
openaire   +1 more source

???????????????????? ?????????????????? ?????????? ?????????????????????? ???????? ???? ???????????? U-Pb ???????????? (3,6???3,2 ???????? ??????)

2014
???? ???????????????????? ???????? ???????????????????????????? ?????????????????????? (3,6???3,2 ???????? ??????) ?????????????????????? ???? ???????? ???????????????? ??? ?? ??????????????-?????????????????????????? ?????????????????????? ???????? ?? ????????????????-???????????????????????? ?????????????????? ??????????????????????-???????????????? ?
openaire   +1 more source

?????????????????? ??????????????????-???????????????????? ?????????????????????????? U/Pb ???????????????????????????? ????????????, ???????????????????? ???????????????????? ?? ???????????????? 1,6; 2,52 ?? 4 ??????

2016
???????????????????????? ???????????? ???????????????????? ???????????????????????? ?????????????????? ?????????????????? ?????????????????? ?? ????????-?????????????????? ???????????????????????????? ????????????, ???????????????????? ?????????????????????????????? ???????????????????? ?? ???????????????? 4 ??????. ???????????????? ????????????????????
openaire   +1 more source

U-Pb systematics in Allende inclusions

Chemical Geology, 1988
G. Manhe`s, C. Go¨pel, C.J. Alle`gre
openaire   +1 more source

U-Pb study of the Josephine Peridotite

Chemical Geology, 1988
C. Go¨pel, G. Manhe`s, C.J. Alle`gre
openaire   +1 more source

U/PB dating of phanerozoic zircon

International Journal of Radiation Applications and Instrumentation. Part D. Nuclear Tracks and Radiation Measurements, 1990
H. Baadsgaard, P. Cavell
openaire   +1 more source