Abstract
The isotopic composition of goethites may provide insight into their environments of formation. After transformation into hematite, however, the primary record obviously erases; such a conclusion arises from analysis of the least metamorphosed banded iron formations.
Potentially Fe oxides besides quartz represent the most suitable minerals for geothermometry. Calculated temperatures from quartz-Fe oxide pairs of banded iron formations of all metamorphic grades vary from 140 to 810°C, which encompass the whole range of crustal temperatures. Because of ill-defined calibration curves at low temperatures calculated temperatures below 400°C should not be taken too seriously and may need refinement and revision.
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© 1992 Springer-Verlag
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Hoefs, J. (1992). The stable isotope composition of sedimentary iron oxides with special reference to banded iron formations. In: Clauer, N., Chaudhuri, S. (eds) Isotopic Signatures and Sedimentary Records. Lecture Notes in Earth Sciences, vol 43. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0009866
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DOI: https://doi.org/10.1007/BFb0009866
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