Subduction of the Indian lithosphere beneath the Tibetan Plateau and Burma

Li, Chang; Hilst, Robert D. van der; Meltzer, A.; Engdahl, E. R.

doi:10.1016/j.epsl.2008.07.016

Cited by 611 publications

(707 citation statements)

References 54 publications

Supporting

Mentioning

592

Contrasting

Unclassified

Order By: Relevance

“…This effect would lead to temperatures being raised in the MTZ under eastern Tibet by about 300 degrees compared to the Sichuan Basin. Tomographic velocity measurements (Li et al, 2008a;Yao et al, 2008), however, show higher velocities (meaning colder temperature and larger MTZ thickness) beneath eastern Tibet than below the Sichuan Basin, which contradicts the hypothesis that our observed thinning of the MTZ below eastern Tibet could be caused by increased temperature.…”

Section: Km and 660 Km Discontinuities Obtained From The P-receivcontrasting

confidence: 55%

“…The shallower LAB beneath eastern Tibet than beneath the Sichuan Basin is confirmed by the S receiver function results (Figure 4b). Lower velocities at 100 km depth below eastern Tibet than below the Sichuan Basin as a consequence of the location of the LAB are supported by ambient noise surface wave tomography studies (Li et al, 2009) and other Rayleigh wave tomography studies (Li et al, 2008a;Yao et al, 2008;Yi et al, 2008).…”

Section: Moho and Lab From P And S Receiver Functionsmentioning

confidence: 76%

“…This in turn means that the apparent thinning of the MTZ below eastern Tibet does not depend on the shallower structure. Li et al (2008a) show high resolution tomographic velocity variations in the region of our profile. Their results indicate a velocity 2-3% higher at 400 km depth below eastern Tibet than below the Sichuan Basin.…”

Section: Validation Assessment Of the Moho Lab 410 Km And 660 Km DImentioning

confidence: 99%

“…As part of the Yangtze craton, the Sichuan Basin is an old, intact block that remained undeformed during the orogenic events that formed the Tibetan plateau. Anomalously cold temperatures derived from tomographic observations extend down to at least ca 200 km beneath the Sichuan Basin and are also present in the Mantle Transition Zone (MTZ) to the east and south-east of the Sichuan Basin (Li et al, 2008a, Yi et al 2008. However, the mode of collision that occurs between the Tibetan and Sichuan lithospheres (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Subsurface compensation may have occurred in a variety of different ways, such as by crustal thickening (Allegrè, 1984), denudation (Meng et al, 2006), slip partitioning (Chen et al, 1994;Tapponnier et al, 2001), subduction of the Indian mantle lithosphere (Kosarev et al, 1999;Kumar et al, 2006;Li et al, 2008a), lithospheric detachment (Houseman et al, 1981, Molnar, 1988, subduction of the Asian lithosphere (Willett and Beaumont, 1994;Kind et al, 2002) and eastward escape (Royden et al, 1997Clark and Royden, 2000;Klemperer, 2006). GPS displacement vectors (Gan et al, 2007) and SKS anisotropy measurements (Wang et al, 2008) indicate that the Tibetan crust (and possibly also the lithosphere and asthenosphere) is escaping eastwards, and that the main portion of the flow is being redirected towards the south east after it encounters the Sichuan Basin ( Figure 1).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Seismic signature of the collision between the east Tibetan escape flow and the Sichuan Basin

Zhang

Yuan

Chen

et al. 2010

Earth and Planetary Science Letters

211

137

View full text Add to dashboard Cite

GPS displacement vectors show that the crust in east Tibet is being squeezed in an easterly direction by the northward motion of the Indian plate, and the Sichuan Basin is resisting this stream and redirecting it mainly towards Indochina. The Longmen Shan, containing the steepest rise to the high plateau anywhere in Tibet, results from the strong interaction between the east Tibetan escape flow and the rigid Yangtze block (Sichuan Basin), but the kinematics and dynamics of this interaction are still the subject of some debates. We herein present results from a dense passive-source seismic profile from the Sichuan Basin into eastern Tibet in order to study the deep structure of this collision zone. Using P and S receiver function

show abstract

Section: Km and 660 Km Discontinuities Obtained From The P-receivcontrasting

confidence: 55%

Section: Moho and Lab From P And S Receiver Functionsmentioning

confidence: 76%

Section: Validation Assessment Of the Moho Lab 410 Km And 660 Km DImentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Seismic signature of the collision between the east Tibetan escape flow and the Sichuan Basin

Zhang

Yuan

Chen

et al. 2010

Earth and Planetary Science Letters

211

137

View full text Add to dashboard Cite

show abstract

Quantifying the impact of mechanical layering and underthrusting on the dynamics of the modern India‐Asia collisional system with 3‐D numerical models

et al. 2014

View full text Add to dashboard Cite

The impact of mechanical layering and the strength of the Indian lower crust on the dynamics of the modern India-Asia collisional system are studied using 3-D thermomechanical modeling. The model includes an Indian oceanic domain, Indian continental domain, and an Asian continental domain. Each domain consists of four layers: upper/lower crust, and upper/lower lithospheric mantle. The Tarim and Sichuan Basins are modeled as effectively rigid blocks and the Quetta-Chaman and Sagaing strike-slip faults as vertical weak zones. The geometry, densities, and viscosities are constrained by geophysical data sets (CRUST2.0, gravity, and seismology). Both static (no horizontal movement of model boundaries) and dynamic scenarios (indentation) are modeled. It is demonstrated that 3-D viscosity distributions resulting from typical creep flow laws and temperature fields generate realistic surface velocities. Lateral variations in the gravitational potential energy cause locally significant tectonic overpressure (i.e., difference between pressure and lithostatic pressure) in a mechanically strong Indian lower crust (up to~500 MPa for the static scenario and~800 MPa for the dynamic scenario). Different density distributions in the lithosphere as well as different viscosities (3 orders of magnitude) in the Indian lower crust cause only minor differences in the surface velocity field. This result suggests that

show abstract

Continental scale body wave tomography of India: Evidence for attrition and preservation of lithospheric roots

Singh

Mercier

Kumar

et al. 2014

Geochem Geophys Geosyst

View full text Add to dashboard Cite

We assemble P and S waveforms of 2301 teleseismic earthquakes registered at 413 broadband seismic stations spanning the Indian plate from the southern tip of India to the Himalayan collision belt and generate an accurate data set of 52,050 P and 30,423 S arrival times through the multichannel crosscorrelation approach. These traveltimes are then inverted to obtain 3-D P and S velocity structures of the subcontinent at a 2 3 2 lateral resolution. The heterogeneous nature of the Indian lithospheric mantle revealed in this study suggests that the lithospheric roots are not uniformly thick on a regional scale. The key cratonic segments of the Indian shield are characterized by pockets of high velocity anomalies ( 3%) at shallow depths (<300 km), with the diamondiferous regions like Wajrakarur revealing high shear wave anomalies down to 300 km. In contrast to the southern Deccan volcanic province (DVP), the northwestern DVP is underlain by low velocity anomalies at similar depths suggesting that the upper mantle retains imprints of Deccan volcanism which was facilitated by the reactivation of the rift systems.

show abstract

Subduction of the Indian lithosphere beneath the Tibetan Plateau and Burma

Cited by 611 publications

References 54 publications

Seismic signature of the collision between the east Tibetan escape flow and the Sichuan Basin

Seismic signature of the collision between the east Tibetan escape flow and the Sichuan Basin

Quantifying the impact of mechanical layering and underthrusting on the dynamics of the modern India‐Asia collisional system with 3‐D numerical models

Continental scale body wave tomography of India: Evidence for attrition and preservation of lithospheric roots

Contact Info

Product

Resources

About