 | | Journal (article/letter/editorial) | | Conditions of metamorphism in an Early Paleozoic blueschist, Schist of Skookum Gulch, northern California...pre-Mesozoic blueschist localities in North America. Among these, the Skookum Gulch occurrence is noteworthy...glaucophane, and crossite (_+magnetite) to magnesio-riebeckite ( + hematite). Application of the available...and in the North Cascades of Washington and British Columbia (Armstrong et al. 1983). Many pre-Mesozoic...to polyphase deformation and polymetamorphism. Blueschist from the schist of Skookum Gulch appears to be |  | Hunziker, D., Burg, J.-P., Moulas, E., Reusser, E., Omrani, J. (2017) Formation and preservation of fresh lawsonite: Geothermobarometry of the North Makran Blueschists, southeast Iran. Journal of Metamorphic Geology, 35 (8) 871-895 doi:10.1111/jmg.12259 | Journal (article/letter/editorial) | | Cretaceous closure of the Tethys Ocean. The largest blueschist outcrop is a >1000 m thick coherent unit with...interlayered metabasalts and metavolcanoclastic rocks. Blueschist metamorphism is only incipient in coarse grained...metamorphic recrystallization. The low variance blueschist peak assemblage is glaucophane, lawsonite, titanite...yield peak conditions of ~300-380 °C at 9-14 kbar. Magnesio-hornblende and rutile cores indicate early amphibolite-facies...and rutile assemblages before entering into the blueschist facies and finally following a retrograde path |
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