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sample

sample. glass. 87 Sr/ 86 Sr. 0.70473. 87 Rb/ 86 Sr. 0.0876. tridymite. 0.70063. 0.0231. palgioclase. 0.69914. 0.00301. pyroxene. 0.69950. 0.00714. total rock. 0.69927. 0.00407. Usando foglio Excel, oppure la calcolatrice!!.

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sample

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  1. sample glass 87Sr/86Sr 0.70473 87Rb/86Sr 0.0876 tridymite 0.70063 0.0231 palgioclase 0.69914 0.00301 pyroxene 0.69950 0.00714 total rock 0.69927 0.00407 Usando foglio Excel, oppure la calcolatrice!! Es. 1 Campione di meteorite (chondrite Allende)- trovare il rapporto isotopico 87Sr/86Sr al momento di formazione del sistema solare Es. 2 Tracciare l’evoluzione del Bulk Silicate Earth (147Sm/144Nd = 0.1967 e 143Nd/144Nd = 0.512638 oggi) nel diagramma 143Nd/144Nd vs t tra 2 Ga ed oggi.

  2. +12 +8 +4 0 -4 -8 Crosta/mantello 1 2 3 4 4.5 Time, Ga Riprodurre lo stesso grafico per le sistematiche Lu-Hf, Sm-Nd e Rb-Sr Crosta/mantello CHUR Crosta/C! ? Incompatible element order

  3. Hf Lu

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