[1]PAN Ji-shun,YAN Ting-song,XU Zhao-fan,et al.Basement Structure of A'nyemaqen Suture Zone and Its Adjacent Areas Determined by Seismic Traveltime Inversion[J].Journal of Seismological Research,2009,32(03):258-263.
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Basement Structure of A'nyemaqen Suture Zone and Its Adjacent Areas Determined by Seismic Traveltime Inversion
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
32
Number of periods:
2009 03
Page number:
258-263
Column:
Public date:
2009-03-23
- Title:
- Basement Structure of A'nyemaqen Suture Zone and Its Adjacent Areas Determined by Seismic Traveltime Inversion
- Keywords:
- basement; A'nyemaqen suture zone; structure; ray method; low velocity zone.
- CLC:
- P315.2
- DOI:
- -
- Abstract:
- The inversion results of the Pg data acquired by wide-angle seismic reflection/refraction data of 11 shots reveal that the basement velocity structure of the eastern part of A'nyemaqen suture zone is characterized by a low velocity zone while the velocity is even in its adjacent areas.The basement in A'nyemaqen suture zone is concave dramatically.Its maximum depth is about 5.5 km in it.The depth of the basement interface in Songpan-Ganzi block is about 3.5 km,and it is flat.The concave feature of the basement interface also appears in the middle part of Songpan-Ganzi block.In the transition zone between A'nyemaqen suture zone and West Qinling fold zone,the basement shallows rapidly up to a depth of 1.8 km,then deepens northwards up to 4.7 km,and finally becomes flat.There exist two kinds of crustal deformation,namely squeezing and striking in A'nyemaqen suture zone.The upper substance of crust has ever escaped northwards.
- References:
- -
- Similar References:
Memo
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Last Update:
2009-03-23