Thermotectonic history of SE China since the Late Mesozoic: insights from detailed thermochronological studies of Hong Kong
Denise LK Tang, Diane Seward, Colin JN Wilson, Roderick J Sewell, Andrew Carter, Bence T Paul
Journal of the Geological Society | GEOLOGICAL SOC PUBL HOUSE | Published : 2014
The late Mesozoic Yanshanian volcanic arc affected an extensive region of SE China, but the conclusion of magmatism and later evolution are not fully understood. Widespread Yanshanian ignimbrites and their contemporaneous granites exposed in Hong Kong represent a microcosm of this magmatic arc. To constrain the post-magmatic thermal history of the region, we present zircon and apatite fission-track analyses from these rocks. Double dating using laser ablation inductively coupled plasma mass spectrometry U-Pb and fission-track techniques on detrital zircons from post-volcanic Cretaceous sediments is used to further constrain the tectonothermal evolution. The resulting dataset and thermal mode..View full abstract
We thank Victoria University for financial support for U-Pb age analyses from the University Research Fund and award of a Doctoral Scholarship to D. L. K. T. B. Kohn is acknowledged for providing zircon He ages of two sedimentary samples. We thank Y. Tian, A. Densmore and M. Cho for their constructive reviews and comments. D. L. K. T. and R.J.S. publish with the permission of the Head of the Geotechnical Engineering Office and the Director of Civil Engineering and Development, HK SAR Government.