Internal morphology, habit and U-Th-Pb microanalysis of amphibolite-to-granulite facies zircons: geochronology of the Ivrea Zone (Southern Alps)
Article Abstract:
Several magmatic and metamorphic events have lead to the development of several types of growth morphologies and alteration mechanisms of zircon crystals in the Ivrea Zone (IZ) in the Southern Alps between Switzerland and Italy. The IZ failed to continue its development further south due to the intrusion of the Strona-Ceneri Zone, where most parts of the zircon crystals grew during the granulite facies metamorphism. An anatexis that grew within the IZ hinders researchers from determining the primary crystallization ages.
Publication Name: Contributions to Mineralogy and Petrology
Subject: Earth sciences
ISSN: 0010-7999
Year: 1999
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Constraining the prograde and retrograde P-T-t path of Eocene HP rocks by SHRIMP dating of different zircon domains: inferred rates of heating, burial, cooling and exhumation for central Rhodope, northern Greece
Article Abstract:
Ion microprobe (SHRIMP) dating was used on various zircon domains from metamorphic rocks of the HP-HT terrane of central Rhodope, northern Greece, to restrict the timing of prograde and retrograde stages within a single tectono-metamorphic cycle. The petrological basis used in the geochronological examination was a well determined P-T-t path for the metamorphic rocks of the terrane. Findings suggest that during the Eocene, Hercynian continental crust was subducted.
Publication Name: Contributions to Mineralogy and Petrology
Subject: Earth sciences
ISSN: 0010-7999
Year: 1999
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Conventional and ion-microprobe U-Pb dating of detrital zircons of the Tentudia Group (Serie Negra, SW Spain): implications for zircon systematics, stratigraphy, tectonics and the Precambrian/Cambrian boundary
Article Abstract:
Detrital zircons from the low grade metagraywacke of the Tentudia Group in Southwestern Spain were subjected to conventional and ion microprobe dating. Uranium and lead dating show a maximum depositional age of 565 Ma for the youngest zircons and supports the 540 to 530 Ma Precambrian/Cambrian boundary. The presence of up to 20% Pan-African detrital zircons from 700 to 550 Ma in the metagraywacke indicates a Gondwana-affinity of the sediments.
Publication Name: Contributions to Mineralogy and Petrology
Subject: Earth sciences
ISSN: 0010-7999
Year: 1993
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