China-Myanmar Geophysical Survey of the Myanmar Orogen (CMGSMO) project
In 2015, Institute of Geology and Geophysics, Chinese Academy of Sciences, incorporating with the Myanmar Geosciences Society, implemented the China-Myanmar Geophysical Survey of the Myanmar Orogen (CMGSMO) project to explore the deep structure beneath Myanmar and understand the continental subduction after continent-continent collision.
During 2016 to 2018, we had deployed 71 temporary seismic stations covering the Central Myanmar from the west to the east (21.6°N to 23.9°N in latitude and 93.1°E to 97.3°E in longitude). The array consists of a dense-deployed linear sub-array and a 2-D backbone network. The east-west trending linear sub-array has 38 stations with average interval of 10-15 km and 400 km long. It traversed the major tectonic unit from Myanmar- India border in the Indo-Burma Ranges (IBR) through the Central Basin (CB) and the Sagaing Fault to Shan Plateau, Myanmar. The backbone 2-D network consists of 33 stations with average spacing of 30-50 km covering the 250 km × 320 km region of the IBR and the CB.
The backbone 2-D network and 13 stations in east-west trending linear sub-array are equipped with the Nanometrics Trillium 120PA broadband sensors with bandwidth from 50 Hz to 120 seconds. The rest stations in the sub-array are equipped with the Guralp CMG-3ESP broadband sensors with bandwidth from 50 Hz to 30/60 seconds. All stations are equipped with the digital data recorders REF TEK 130. A total of 457 gigabyte continuous data are collected during 18 months observation.
Publications/manuscripts related to this project:
1. Tianyu Zheng, Yumei He*, Lin Ding, Mingming Jiang, Yinshuang Ai, Chit Thet Mon, Guangbing Hou, Kyaing Sein, Myo Thant (2019), Direct structural evidence for Indian continental crust subducting beneath Myanmar, submitted to Nature Communications. Receiver functions related with this study will be available soon.
2. Yiming Bai, Xiaohui Yuan, Yumei He, Guangbing Hou, Myo Thant, Kyaing Sein, Yinshuang Ai*
(2019), Slab Break-off and Tearing beneath Myanmar Inferred from Mantle Transition Zone Structure, submitted to Earth and Planetary Science Letters
. Receiver functions related with this study will be available soon.
3. Chit Thet Mon, Xuan Gong, Mingming Jiang, Qi-Fu Chen, Miao Zhang, Guangbing Hou, Myo Thant, Kyaing Sein, Yumei He* (2019), Insight into major active faults in Central Myanmar and the related geodynamic sources, submitted to Geophysical Research Letters. Earthquake waveforms related with this study will be available soon.
4. Yi Wang, Yumei He*, Gang Lu, Lianxing Wen (2019), Seismic, thermal and compositional structures of the stagnant slab in the mantle transition zone beneath southeastern China, Tectonophysics, in press.
The Seismic Array Laboratory will make complete CMGSMO data publicly available from Jan. 2022 (three years after the completion of the CMGSMO project).