Zobrazeno 1 - 10
of 91
pro vyhledávání: '"M.A. Geyh"'
Publikováno v:
Palaeogeography, Palaeoclimatology, Palaeoecology. 205:273-294
Dates determined with three absolute dating methods (14C, luminescence and 230Th/U) supported the findings of the paleobotanical investigations of the Weichselian Upper Fluvial Sequence of the Scheibe opencast mine in the Niederlausitz (Lower Lusatia
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fc3685a8d71e13d91e4d5d931400cc90
https://doi.org/10.1016/j.palaeo.2003.12.012
https://doi.org/10.1016/j.palaeo.2003.12.012
Autor:
M.A. Geyh, J.C. Vogel
Publikováno v:
South African Journal of Science, Volume: 104, Issue: 11-12, Pages: 493-495, Published: DEC 2008
The radiometric dating of calcrete is often problematical because impurities and open system conditions affect the apparent ages obtained. By applying both radiocarbon and uranium-series dating to calcrete in colluvium, it is shown that such conditio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::654867924266d41dbc72178d86233119
http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S0038-23532008000600025&lng=en&tlng=en
http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S0038-23532008000600025&lng=en&tlng=en
Autor:
M.A. Geyh
Publikováno v:
Isotopes in the Water Cycle ISBN: 140203010X
After the discovery of the C method as a chronometer for old groundwater in 1957 scientists concentrated their efforts first on the development of hydrochemical and isotopic models as well as empirical approaches to estimate the initial C value of th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1115e303a9a15e02fc92acba621744ba
https://doi.org/10.1007/1-4020-3023-1_15
https://doi.org/10.1007/1-4020-3023-1_15
Publikováno v:
Nuclear Tracks and Radiation Measurements (1982). 10:945-952
In 1982, four homogenized calcite samples of differing ages and origin and one fossil bone sample were investigated by 16 laboratories engaged in ESR dating. The goal of phase II of this project was to determine the precision of ED evaluation that ca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::99794ec448675fc82b4852ca12e331dd
https://doi.org/10.1016/0735-245x(85)90112-7
https://doi.org/10.1016/0735-245x(85)90112-7
Publikováno v:
Marine Geology. 17:M45-M50
Unreliability of radiocarbon ages obtained on the organic-carbon fraction of marine sediments stored wet and over a long period is explained as a consequence of bacterial up-take of recent CO2. Deep-freezing, drying or immediate processing of samples
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2e423b9f925020c547cbe0159d429440
https://doi.org/10.1016/0025-3227(74)90043-7
https://doi.org/10.1016/0025-3227(74)90043-7
Publikováno v:
CATENA. 9:253-263
Summary Isotope analyses of 36 groundwater samples were performed as part of an extensive hydrogeological study in Tripolitania, Libya. The stable isotope ratios 2 H/ 1 H, 18 O/ 16 O, and 13 C/ 12 C, and the radioactive isotope ratios 3 H/ 1 H and 14
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a635963dbdbf2e86fea05ba35e70360d
https://doi.org/10.1016/s0341-8162(82)80017-9
https://doi.org/10.1016/s0341-8162(82)80017-9
Autor:
M.A. Geyh
Publikováno v:
The International Journal of Applied Radiation and Isotopes. 20:463-466
Investigations on the acetylene auto-production of commercial lithium metal after heating up and subsequent addition of water brought values from 0·04 to 3 mg C/g Li. Thus, these contaminations will falsify the results of 14C-age determinations of o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8b5b2142c41de803c7aacc23415c03a1
https://doi.org/10.1016/0020-708x(69)90137-9
https://doi.org/10.1016/0020-708x(69)90137-9
Autor:
M.A. Geyh
Publikováno v:
Zeitschrift der Deutschen Geologischen Gesellschaft. 118:218-221
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a4676d862cb2d6955571cadc6f88e855
https://doi.org/10.1127/zdgg/118/1969/218
https://doi.org/10.1127/zdgg/118/1969/218
Autor:
M.A. Geyh
Publikováno v:
Earth and Planetary Science Letters. 71:200-201
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::81a1f4f33d36c921a1d0415476e4e2cb
https://doi.org/10.1016/0012-821x(84)90066-9
https://doi.org/10.1016/0012-821x(84)90066-9
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