Was the Paleo-Asian Ocean subducted beneath North China? – An integrated geological and seismic imaging study


Grant Data
Project Title
Was the Paleo-Asian Ocean subducted beneath North China? – An integrated geological and seismic imaging study
Principal Investigator
Professor Zhao, Guochun   (Principal investigator)
Co-Investigator(s)
Dr He Yanhong   (Co-Investigator)
Professor Zhang Shihong   (Co-Investigator)
Dr Zhang Jian   (Co-Investigator)
Duration
36
Start Date
2016-01-01
Completion Date
2018-12-31
Amount
706972
Conference Title
Presentation Title
Keywords
Paleo-Asian Ocean, North China Block, Siberia, Subduction, Plate tectonics
Discipline
Earth Sciences
Panel
Physical Sciences (P)
Sponsor
RGC General Research Fund (GRF)
HKU Project Code
17301915
Grant Type
General Research Fund (GRF)
Funding Year
2015/2016
Status
On-going
Objectives
2 To carry out extensive field-based structural investigations on Paleozoic complexes at the northern margin of the North China Block and determine the nature of major structural episodes through detailed structural analysis, especially on the early deformation phases which are critical to determining the polarity of the subduciton if the Paleo-Asian Ocean was indeed subducted beneath the northern margin of the North China Block; 3 To probe the geochemical characteristics of Paleozoic plutons and volcanic rocks in the Bayan Obo, Chengde and Yitong areas in order to investigate whether they have affinities to continental margin arcs; 4 To utilize LA-ICP-MS/ SHRIMP U–Pb zircon geochronology combined with cathodoluminescence (CL) imaging to determine the rock-forming ages of Paleozoic plutons and volcanic rocks in the Bayan Obo, Chengde and Yitong areas in order to determine when the southward subduction of the Paleo-Asian Ocean beneath the northern margin of the North China Block started if such subduction did exist; 5 On the basis of the above studies, to establish a comprehensive tectonic model for the Paleozoic evolution of the northern margin of the North China Block in association with expansion and closure of the Paleo-Asian Ocean.