Tertiary strike-slip faulting in southeastern Mongolia and implications for Asian tectonics

Webb, Laura E.; Johnson, Cari L.

doi:10.1016/j.epsl.2005.10.033

Cited by 90 publications

(73 citation statements)

References 35 publications

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“…However, on the one hand the EW-trending Jintai-Huahai basin mainly formed after the Miocene, and on the other those normal faults were not active at the same time (Zhai 1989), so the Altyn Tagh fault could not pass through the basin into the Alxa Block before the Miocene. Even if the Altyn Tagh fault could enter the basin, due to the absorption of the displacement of strikeslip by normal faults in the basin, the assumed Altyn Tagh fault to the northeast cannot have a displacement of 400 km (Yue and Liou 1999;Yue et al 2001a, b) or 185-250 km (Webb and Johnson 2006;Darby et al 2005) all along to the Sea of Okhotsk.…”

Section: Deformation Of the Jintai-huahai Basinmentioning

confidence: 96%

“…The Alxa Block has undergone strong tectonic deformation since the Mesozoic (Vincent and Allen 1999;Yue and Liou 1999;Yue et al 2001a, b;Lamb et al 1999;Hendrix et al 2001;Ritts 2002, Darby et al 2005;Meng 2003;Meng et al 2003;Webb et al 1999Webb et al , 2006Zheng et al 1996;Wang and Mo 1995;Graham et al 2001;Johnson 2004;Liu 1998;Liu andYang 1997, 2000;Yang et al 1988;Wang et al 1998;Zuo et al 2003;Zheng and Wang. 2005;Wang et al 2005;Chen and Xu 2006;Li et al 2004).…”

Section: Introductionmentioning

confidence: 96%

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How did the Alxa Block respond to the Indo-Eurasian collision?

Zhang

et al. 2009

Int J Earth Sci (Geol Rundsch)

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Section: Deformation Of the Jintai-huahai Basinmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 96%

How did the Alxa Block respond to the Indo-Eurasian collision?

Zhang

et al. 2009

Int J Earth Sci (Geol Rundsch)

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“…Evidence for middle-Cretaceous movement on faults within the EGFZ was identified using seismic reflection data by Johnson (2004). Outcrop data evidenced a sinistral strike-slip motion in the Cenozoic time (Webb and Johnson, 2006). The 20 July, 2005, Hatanbulag (HB) earthquake occurred in the uplifted Hutag Uul cratonal block of Badarch et al (2002) about 9.5 km southwest of Hatanbulag town, ∼50 km south of the Züünbayan fault and ∼30 km north of an unnamed fault (Fig.…”

Section: South East Gobimentioning

confidence: 99%

“…Rocks in southeastern Mongolia are considered to be a part of the Central Asian Orogenic Belt, or Altaids, and record history of the amalgamation of Asia via collision and accretion (Sengör et al, 1993). Therefore, data from this region are considered to have important implications for understanding the complex history of intracontinental deformation in Asia (Graham et al, 2001;Webb and Johnson, 2006). The Züünbayan and North Züünbayan faults, which are collectively referred to in some literature as the Züünbayan Fault Zone (ZBFZ) (Lamb et al, 1999), or the East Mongolian Fault Zone (EMFZ) (Yue and Liou, 1999), or the East Gobi Fault Zone (EGZF) (Webb and Johnson, 2006), follows the southern edge of the Altaid complex (Sengör et al, 1993) running along the EGB, and defines a structural corridor in this region.…”

Section: South East Gobimentioning

confidence: 99%

“…Therefore, data from this region are considered to have important implications for understanding the complex history of intracontinental deformation in Asia (Graham et al, 2001;Webb and Johnson, 2006). The Züünbayan and North Züünbayan faults, which are collectively referred to in some literature as the Züünbayan Fault Zone (ZBFZ) (Lamb et al, 1999), or the East Mongolian Fault Zone (EMFZ) (Yue and Liou, 1999), or the East Gobi Fault Zone (EGZF) (Webb and Johnson, 2006), follows the southern edge of the Altaid complex (Sengör et al, 1993) running along the EGB, and defines a structural corridor in this region. Yue and Liou (1999) and Lamb et al (1999) proposed a kinematic linkage between the EGFZ and the Altyn Tagh fault through the Alxa fault, just south of the MongoliaChina border.…”

Section: South East Gobimentioning

confidence: 99%

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Surface deformations from moderate-sized earthquakes in Mongolia observed by InSAR

2013

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We investigate surface deformations associated with two moderate-sized shallow earthquakes that occurred in the southeastern and northwestern stable regions of Mongolia using an analysis of ENVISAT/ASAR and ALOS/PALSAR data, respectively. Differential interferograms generated by a standard two-pass interferometric analysing technique depicted an uplift of up to ∼1 cm for the M W 5.2 Hatanbulag composite earthquake (20 July, 2005, moderate-size foreshock in three hours) and a subsidence of up to ∼10 cm for the M W 5.1 Büsiin Gol earthquake (19 January, 2008) in the radar line-of-sight directions, respectively. We inverted the observed deformations for the source parameters of the two earthquakes using elastic dislocation modeling. Our preferred model has geodetic moments of ∼3.83 ×10 17 (M w 5.6) and 5.56×10 16 N m (M w 5.1) for the Hatanbulag and Büsiin Gol earthquakes, respectively.

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Geophysical constraints for terrane boundaries in southern Mongolia

et al. 2014

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The Central Asian Orogenic Belt (CAOB) is a typical accretionary orogen divided into numerous lithostratigraphic terranes. In theory, these terranes should be characterized by contrasting magnetic and gravity signatures owing to their dissimilar petrophysical properties. To test this hypothesis, the extent of tectonostratigraphic terranes in southern Mongolia was compared with the potential field data. The analysis reveals that the terrane boundaries are not systematically defined by strong gravity and magnetic gradients. The correlation of the magnetic signal with the geology reveals that the magnetic highs coincide with Late Carboniferous to Early Permian volcanic-plutonic belts. The matched filtering shows a good continuity of signal along the boundaries of these high magnetic anomalies toward the deeper crustal levels which may indicate the presence of deeply rooted tectonomagmatic zones. The axes of high-density bodies in the western and central parts of the study area are characterized by periodic alternations of NW-SE trending gravity anomalies corresponding to up to 20 km wide cleavage fronts of Permo-Triassic age. The matched filtering analysis shows good continuity of signal to the depth of these gravity highs which may indicate presence of deeply rooted high-strain zones. The magnetic signal is interpreted to be as the result of a giant Permo-Triassic magmatic event associated with lithosphere-scale deformation, whereas the gravity pattern is related to the postaccretionary shortening of the CAOB between the North China and Siberia cratons.

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Tertiary strike-slip faulting in southeastern Mongolia and implications for Asian tectonics

Cited by 90 publications

References 35 publications

How did the Alxa Block respond to the Indo-Eurasian collision?

How did the Alxa Block respond to the Indo-Eurasian collision?

Surface deformations from moderate-sized earthquakes in Mongolia observed by InSAR

Geophysical constraints for terrane boundaries in southern Mongolia

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