Crustal thickness variations across the northern Tien Shan from teleseismic receiver functions

<p>Uplifting mechanisms for the Tien Shan, an active intracontinental orogenic belt, have been under debate for decades, a key issue being how the convergence has been accommodated at depth. Here we investigate the Moho structure across the central Tien Shan by common-conversion-point imaging and H-k-c stacking of receiver functions from a dense array. The observed Moho exhibits distinct characteristics among sub-blocks. Southward-dipping diffuse Moho is imaged in the Southern Tien Shan (STS), in contrast with the relatively flat and sharp Moho beneath the Tarim Basin. This feature along with the large Moho offset beneath the South-Boundary Fault suggests that the shortening and thickening of Tien Shan crust rather than the underthrusting of the Tarim Basin are responsible for the uplift of the STS. In the Northern Tien Shan, however, the imaged Moho doublet provides direct evidence for the underthrusting of the Kazakh Shield accommodating the convergence there.</p>

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THE STRESS STATE OF THE NORTHERN TIEN SHAN CRUST BASED ON THE KNET SEISMIC NETWORK DATA

Геология и геофизика ◽

10.15372/gig20160303 ◽

2016 ◽

Vol 57 (3) ◽

Keyword(s):

Stress State ◽

Seismic Network ◽

Tien Shan ◽

Network Data ◽

Northern Tien Shan

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Regional crustal thickness variations of the Peninsular Ranges, southern California

Geology ◽

10.1130/0091-7613(2000)028<0303:rctvot>2.3.co;2 ◽

2000 ◽

Vol 28 (4) ◽

pp. 303-306

Author(s):

Jennifer L. Lewis ◽

Steven M. Day ◽

Harold Magistrale ◽

Jennifer Eakins ◽

Frank Vernon

Keyword(s):

Southern California ◽

Crustal Thickness ◽

Peninsular Ranges ◽

Thickness Variations

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High Mountain Asian glacier response to climate revealed by multi-temporal satellite observations since the 1960s

Nature Communications ◽

10.1038/s41467-021-24180-y ◽

2021 ◽

Vol 12 (1) ◽

Author(s):

Atanu Bhattacharya ◽

Tobias Bolch ◽

Kriti Mukherjee ◽

Owen King ◽

Brian Menounos ◽

...

Keyword(s):

Mass Loss ◽

River Flow ◽

Tien Shan ◽

High Mountain ◽

Glacier Mass Balance ◽

Temperature And Precipitation ◽

Multi Temporal ◽

The 1960S ◽

Northern Tien Shan

AbstractKnowledge about the long-term response of High Mountain Asian glaciers to climatic variations is paramount because of their important role in sustaining Asian river flow. Here, a satellite-based time series of glacier mass balance for seven climatically different regions across High Mountain Asia since the 1960s shows that glacier mass loss rates have persistently increased at most sites. Regional glacier mass budgets ranged from −0.40 ± 0.07 m w.e.a−1 in Central and Northern Tien Shan to −0.06 ± 0.07 m w.e.a−1 in Eastern Pamir, with considerable temporal and spatial variability. Highest rates of mass loss occurred in Central Himalaya and Northern Tien Shan after 2015 and even in regions where glaciers were previously in balance with climate, such as Eastern Pamir, mass losses prevailed in recent years. An increase in summer temperature explains the long-term trend in mass loss and now appears to drive mass loss even in regions formerly sensitive to both temperature and precipitation.

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