Except for blueschist
and eclogite, the rocks used in the experiment are readily available in school rock collections or from Australian outcrops (Figure 6).
Petrogenesis of lawsonite and epidote eclogite and blueschist
, Sivrihisar Massif, Turkey.
Two of the samples, the glaucophanic metabasalt of the blueschist
facies and a metabasalt of the greenschist facies, belong to outcrops within the Neon Basin.
Many orogenic belts are characterized by metamorphic rocks called blueschists
that have been formed under high-pressure and low-temperature conditions.
The text discusses the general petrography of mapped lithological units, lithostratigraphy and indications for primary associations in the Cycladic blueschist
unit on Syros, and Syros as an example of the structural evolution of the Cycladic Blueschist
At lower geothermal gradients (i.e., P-T trajectories that pass above the invariant point) most mafic rocks show a progression from zeolite or blueschist
facies to pumpellyite-actinolite facies to greenschist facies.
Comment on Redistribution of trace elements during prograde metamorphism from lawsonite blueschist
to eclogite facies; implications for deep subduction-zone processes by C.
In this paper, we adopt the name Etpana Metamorphic Suite (Zuluaga et al., 2008) referring to the metamorphic rocks exposed in the northern sector of the Serrania deJarara and Serrania de Macuira and consisting of a large lithologic variety such as quartzite, quartz-schist, graphite schist, talc- tremolite schist and phyllite associated with blocks of serpentinites, gabbros, and blueschist
. Lookwood (1965) argued that the protolith for these rocks correspond to a thick sequence of shales and quartz arenites with small quantities of tuffs, deposited in a deep basin.
(1999): The assemblage stilpnomelane --chlorite--phengitic mica : a geothermobarometer for blueschist
and associated greenschist terranes.
Comment on "Redistribution of trace elements during prograde metamorphism from lawsonite blueschist
to eclogite facies; implications for deep subduction-zone processes" by C.
1988; Tectonic history of subduction zones inferred from retrograde blueschist
P--T paths: Geology, 16, 1081--1084.