Rb-Sr Dating

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Rubidium-strontium dating - Wikipedia
Rb-Sr Dating | SpringerLink
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Rubidium Strontium Dating - SlideShare
What is RUBIDIUM-STRONTIUM DATING? What does RUBIDIUM . . .
ルビジウム-ストロンチウム年代測定 - Rubidium-strontium dating - Wikipedia
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The rubidium-strontium dating method is a radiometric dating technique used by scientists to determine the age of rocks and minerals from the quantities they contain of specific isotopes of rubidium (87 Rb ) and strontium (87 Sr , 86 Sr ) . . Development of this process was aided by German chemists Otto Hahn and Fritz Strassmann, who later went on to discover nuclear fission in December 1938 .
Rb-Sr dating of sphalerites from Tennessee and the genesis of Mississippi Valley-type ore deposits . Nature, 346(6282), 354-357 . CrossRef Google Scholar . Nakai, S ., et al ., 1993 . Rb-Sr dating of sphalerite from mississippi valley-type (MVT) ore deposits .
The Rb-Sr dating method has been used extensively in dating rocks . If the initial amount of Sr is known or can be extrapolated, the age can be determined by measurement of the Rb and Sr concentrations and the 87 Sr / 86 Sr ratio . The dates indicate the true age of the minerals only if the rocks have not been subsequently altered .
Rubidium-strontium ( Rb-Sr ) dating was the first technique in which the whole-rock isochron method was extensively employed . Certain rocks that cooled quickly at the surface were found to give precisely defined linear isochrons, but many others did not . Some studies have shown that rubidium is very…
Rb-Sr dating relies on correctly measuring the Rb-Sr ratio of a mineral or whole rock sample, plus deriving an accurate 87Sr/86Sr ratio for the mineral or whole rock sample . Several preconditions must be satisfied before a Rb-Sr date can be considered as representing the time of emplacement or formation of a rock . The system must have remained . . .
The Rb/Sr System . by β decay . The neutron emits an electron to become a proton . For this decay reaction, λ = 1 .42 x 10-11 /yr, τ 1/2 = 4 .8 x 10 10 yr at present, 27 .85% of natural Rb is 87 Rb . . If we use this system to plug into equation (2), then
Rb -87 decays with a half-life of 48 .8 billion years to Sr -87 . This half-life is so long that the Rb-Sr method is normally only used to date rocks that are older than about 100 million years . Which minerals and rocks can be dated with the Rb-Sr method? The minerals must contain Rb , which is a rather rare element .
Rubidium-strontium dating The rubidium-strontium dating method is a radiometric dating technique used by scientists to determine the age of rocks and minerals from the quantities they contain of specific isotopes of rubidium (87 Rb ) and strontium (87 Sr , 86 Sr ) . 3 . Chemical properties Strontium Alkaline earth element (group II A) +2 valency . . .
ルビジウム-ストロンチウム年代測定 - Rubidium-strontium dating . ルビジウム-ストロンチウム年代測定 法は、 年齢 を決定するために 科学者 が使用する 放射年代測定 技術です。 . ルビジウム（Rb）とストロンチウム（Sr、Sr）の特定の同位体を含む量からの岩石と . . .
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Rb-Sr Dating