Revealing the Mineralogical and Petrographic Signs of Fluid-Related Processes in the Kelebia Basement Area (Szeged Basin, S Hungary): A Case Study of Alpine Prograde Metamorphism in a Permo-Triassic Succession

Table 2

Temperature-dependent structural and textural features of the studied rock samples.

Rock type	Mineralogical and/or petrographic features	Characteristic temperature (°C)
Permian siliciclastic rocks	;	~300
	Slaty appearance, domainal spaced cleavage, and fibrous strain shadows subparallel to the foliation	>200–250
Permian ignimbrites	Disjunctive foliation and strain shadows	>200–250
	Undulatory extinction and deformation lamellae in quartz	>200, generally 300–400
	Mechanical twins in replacement dolomite	> 300
	Inherited blue to red CL colors of quartz	<500
Lower Triassic siliciclastic rocks	Deformation lamellae in both the original quartz grain and its overgrowth	>200, generally 300–400
	Thick () twins in replacement carbonate	>200, generally 200–300 (valid and calibrated in the case of calcite)