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- W2895972862 abstract "Wall rock assimilation and fractional crystallization (AFC) as Bowen has pointed out in 1928, should be considered together because the heat required for assimilation can be provided by the latent heat of crystallization of the magmas. This process (AFC) was discussed by several authors, who sought to reproduce observed trends on isotope-isotope and isotope-trace element diagrams. In general, these models were loosely constrained because of the pratical difficulties in handling large numbers of elements and in exploring the relationships between different variables for any data set. In this work, the approach has been to consider many trace elements and isotope ratios simultaneously, to calculate the best fit surface through the analytical data for suites of related samples and to evaluate the relationships between variables in the AFC model for the range of solutions which are consistent with the best-fit surface. This new analysis of the AFC model is illustrated with selected samples from a detailed section through basalts and rhyolites of the Serra Geral Formation in the Paraná Basin sequence. Results appear to be inconsistent with the bulk assimilation of average crustal compositions, but show excellent agreement with the trace element pattern of typical upper crustal melts." @default.
- W2895972862 created "2018-10-26" @default.
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- W2895972862 date "1988-06-01" @default.
- W2895972862 modified "2023-10-14" @default.
- W2895972862 title "Crustal contamination inverted: some preliminary results" @default.
- W2895972862 doi "https://doi.org/10.25249/0375-7536.19881822732" @default.
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