Trace element behavior in the zoned metasomatic bodies of Unst,Shetland |
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| Authors: | C. D. Curtis P. E. Brown |
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| Affiliation: | (1) Department of Geology, The University, S13 JD Sheffield, England;(2) Department of Geology, University of California, Los Angeles, 90024 Los Angeles, California, USA;(3) Present address: University of California, 90024 Los Angeles, California |
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| Abstract: | An earlier investigation of metasomatic alteration (Curtis and Brown, 1969) is extended to trace element distribution. Most element profiles may be linked simply with diffusive mixing. Between element differentiation is slight, but certain elements are selectively concentrated in particular mineral phases.Trace elements never exhibit the spectacular  unmixing shown by some major elements as monomineralic zones develop. Local equilibrium considerations still contribute materially to an understanding of overall behavior. |
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