Rb-Sr, K-Ar and fission track ages for granites from Penang Island, West Malaysia: an interpretation model for Rb-Sr whole-rock and for actual and experimental mica data

Article Abstract:

The occurrence of a late-Triassic intrusive event caused the granites of Penang Island, Malaysia, to feature varying of Rb-Sr, K-Ar and fission track isotopic readings. The distortion was due to the mixing of older isochrons with younger ones containing high levels of (87/86)Sr. Chronological assessment of the granites required the use of other radiometric methods to determine the accuracy of the dating method. In addition, rock formations around the island exhibited similar isotopic concentrations.

Research, Rocks, Mica, Potassium-argon dating, Rubidium-strontium dating, Fission track dating, Penang, Malaysia

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Anticorrelated Rb-Sr and the K-Ar age discordances, Leuchtenberg granite, NE Bavaria, Germany

Article Abstract:

The K-Ar age progression within the northern lobe of the Leuchtenberg granite, NE Bavaria, Germany shows that this part cooled down over a period of the order of 20 Ma while the southern part suffered a different thermal history. The northern half of the intrusion probably altered its orientation by subsequent tectonic movements. The study shows the applicability of an integrated Rb-Sr and K-Ar dating in developing a detailed chronological profile of a single igneous intrusion.

Bavaria, Germany

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