![]() | This ![]() It is of interest to the following WikiProjects: | ||||||||||||||||||||
|
IMHO this article's title should be 'Isotope geology'. Siim 12:45, 10 February 2006 (UTC)
Should there be something here about oxygen stable isotopes and paleoclimatology? Safay 20:48, 6 April 2006 (UTC)
Strontium-neodymium (Sr-Nd) isotope geochemistry is yielding new information relative to melt sources and new age data on granitoids. See: Millone, et. al. (2000?) "Age and Strontium-Neodymium Isotope Geochemistry of granitoids of the Sierra Norte-Ambargasta Batholith, Central Argentina." http://www.brasil.ird.fr/sympIsotope/Papers/ST5/ST5-39-Millone.pdf. Variations in strontium-isotopes proportions incorporated into enamel and dentine of the teeth of horses and other herbivores - and sometimes humans - can detect where it once lived and what it ate. Knowing when, where, and what Tibetan horses, yaks and rhinoceroses ate helps date the Tibetan uplift. See: "Tibetan uplift: looking a gift horse in the mouth." Earth Pages, May 2006. http://www.earth-pages.com/archive/tectonics.asp
Osmium-strontium-neodymium-lead (Os-Sr-Nd-Pb) isotopes for covariation analysis in mid-ocean ridge basalts. See: Allegre et al. (1997) "Osmium-strontium-neodymium-lead isotopic covariations in mid-ocean ridge basalt glasses and the heterogeneity of the upper mantle." Earth and Planetary Science Letters, Vol. 150, No. 3, pp. 363-379(17).
Cerium-lead (Ce-Pb) isotope ratios as an indicator for enrichment in continental crust from volcanic rock. See: Langmuir et al. (1994) "Cerium/lead and lead isotope ratios in arc magmas and the enrichment of lead in the continents." Nature, Volume 368, Issue 6471, pp. 514-520.
Niobium-thorium (Nb-Th) isotope ratios show lithosphere differentiation since ~3.8 bya. See: Collerson and Kamber. (1999) "Evolution of the Continents and the Atmosphere Inferred from Th-U-Nb Systematics." Science, 5 March, pp. 1519-1522.
Niobium-uranium (Nb-U) ratios in greenstone-belts indicating crustal growth. See: Bowyer, et al. (1997) "Niobium/Uranium Evidence for Early Formation of the Continental Crust." Science, 24 January, Vol. 275. no. 5299, pp. 521 - 523.
There's others. I think I should be linking references to articles here that refer to these types of analyses for further clarification, but I don't have enough information to write them. Valich 22:34, 10 September 2006 (UTC)
Have I minterpreted the comment "Lead is created in the Earth via decay of transuranic elements, primarily uranium and thorium." as meaning that's its only source? Wasn't there some sort of primaeval abundance, aside reom the residues from the decay of heavier elements? —Preceding unsigned comment added by 200.92.208.230 ( talk) 01:54, 6 January 2009 (UTC)
I think it would be better to write out the delta notation as the difference between the sample and standard and show how that simplifies to the ratio minus one - that is we can write (Rsam-Rstd)/Rstd = Rsam/Rstd-1. I'm not good at writing out the equations so I don't know how to do that with the code. Alatleephillips ( talk) 17:10, 15 April 2016 (UTC)
Hello fellow Wikipedians,
I have just modified one external link on Isotope geochemistry. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.
This message was posted before February 2018.
After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than
regular verification using the archive tool instructions below. Editors
have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the
RfC before doing mass systematic removals. This message is updated dynamically through the template {{
source check}}
(last update: 5 June 2024).
Cheers.— InternetArchiveBot ( Report bug) 13:17, 23 January 2018 (UTC)