Cenozoic Volcanism in Tibet: Evidence for a Transition from Oceanic to Continental Subduction

Ding, Lin; Kapp, Paul; Zhong, Dingkun; Deng, Wenfeng

doi:10.1093/petrology/egg061

Cited by 535 publications

(380 citation statements)

References 108 publications

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“…Previous studies have shown that the adakitic rocks are K-rich, forming a 1000-km-long belt oriented sub-parallel to the IYS. The ages of the adakitic rocks range from 26.2 to 10 Ma (Cai et al, 2005;Chung et al, 2003Chung et al, , 2009Gao et al, 2007a;Guo et al, 2007;Hou et al, 2004;Xu et al, 2010;this study), within the range of the 22.5-12 Ma ages obtained for potassic-ultrapotassic igneous rocks in the Lhasa terrane (e.g., Ding et al, 2003;Gao et al, 2007b;Miller et al, 1999;Nomade et al, 2004;Williams et al, 2001Williams et al, , 2004Zhao et al, 2009), except for the 26.2 Ma age of adakitic rocks in Linzhi (Chung et al, 2003). Recently, Miocene adakitic dykes have been found on the southern side of the IYS, including the Mayum and Kuday dykes King et al, 2007) within the northern belt of the Tethyan Himalayan tectonic zone.…”

Section: Introductionsupporting

confidence: 58%

“…Drummond and Defant (1990) and Martin (1986), and (b) La N /Yb N vs. Yb N after Defant and Drummond (1990) and Petford and Atherton (1996), showing the fields for adakite and arc intermediate-felsic rock. Data sources are as follows: Linzizong volcanics and the Gangdese batholith are from Zhang (1996), Jiang et al (1999), Song (1999), and Wu et al (2005; K-rich magmatic rocks are from Miller et al (1999), Williams et al (2001Williams et al ( , 2004, Ding et al (2003), Nomade et al (2004), andGao et al (2007b) (other data sources are as in Figs. 1 and 3).…”

Section: Origin Of Adakitic Rocks On the South Side Of The Iysmentioning

confidence: 99%

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Geochemical variations in Miocene adakitic rocks from the western and eastern Lhasa terrane: Implications for lower crustal flow beneath the Southern Tibetan Plateau

Chen

Zhao

et al. 2011

Lithos

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Section: Introductionsupporting

confidence: 58%

Section: Origin Of Adakitic Rocks On the South Side Of The Iysmentioning

confidence: 99%

Geochemical variations in Miocene adakitic rocks from the western and eastern Lhasa terrane: Implications for lower crustal flow beneath the Southern Tibetan Plateau

Chen

Zhao

et al. 2011

Lithos

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“…4c). Whether these melts are the product of lithospheric thinning or intracontinental subduction (35,41) remains a topic of active research.…”

Section: Crustal Shortening and Fission-track Analyses Of North-centrmentioning

confidence: 99%

Constraints on the early uplift history of the Tibetan Plateau

Wang

Zhao

Liu

et al. 2008

Proc. Natl. Acad. Sci. U.S.A.

722

476

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The surface uplift history of the Tibetan Plateau and Himalaya is among the most interesting topics in geosciences because of its effect on regional and global climate during Cenozoic time, its influence on monsoon intensity, and its reflection of the dynamics of continental plateaus. Models of plateau growth vary in time, from pre-India-Asia collision (e.g., Ϸ100 Ma ago) to gradual uplift after the India-Asia collision (e.g., Ϸ55 Ma ago) and to more recent abrupt uplift (<7 Ma ago), and vary in space, from northward stepwise growth of topography to simultaneous surface uplift across the plateau. Here, we improve that understanding by presenting geologic and geophysical data from north-central Tibet, including magnetostratigraphy, sedimentology, paleocurrent measurements, and 40 Ar/ 39 Ar and fission-track studies, to show that the central plateau was elevated by 40 Ma ago. Regions south and north of the central plateau gained elevation significantly later. During Eocene time, the northern boundary of the protoplateau was in the region of the Tanggula Shan. Elevation gain started in pre-Eocene time in the Lhasa and Qiangtang terranes and expanded throughout the Neogene toward its present southern and northern margins in the Himalaya and Qilian Shan.climate ͉ tectonics ͉ magnetostratigraphy ͉ Hoh Xil Basin ͉ Cenozoic T he Tibetan Plateau is the most extensive region of elevated topography in the world (Fig. 1). How such high topography, which should have an effect on climate, monsoon intensity, and ocean chemistry (1-5), has developed through geologic time remains disputed. Various lines of investigation, including evidence from the initiation of rift basins (6), potassium-rich (K-rich) volcanism (7), tectonogeomorphic studies of fluvial systems and drainage basins (8), thermochronologic studies (9), upper-crustal deformation histories (10, 11), stratigraphic and magnetostratigraphic studies of sediment accumulation rates (12), paleobotany (13), and oxygen isotope-based paleoaltimetry (14-22), have suggested different uplift histories. Authors of recent geologic studies (11) have proposed that significant crustal thickening (and by inference, surface uplift) in the Qiangtang terrane occurred in the Early Cretaceous [Ϸ145 mega-annum (Ma) age], followed by major crustal thickening within the Lhasa terrane between Ϸ100 and 50 Ma ago. This hypothesis remains disputed (23). Other models of plateau growth range from Oligocene (e.g., Ϸ30 Ma ago) gradual surface uplift (7) to more recent (Ͻ7 Ma ago) and abrupt surface uplift (24), with oblique stepwise growth of elevation northward and eastward after the India-Eurasia collision (7,20,25,26). With few exceptions (e.g., see refs. 11 and 27), most of these models focus on data from the Himalaya and southern Tibet and remain relatively unconstrained by geologic data from the interior of the Tibetan Plateau.The Hoh Xil Basin (HXB) of the north-central Tibetan Plateau (Figs. 1 and 2) is the most widespread exposure of Paleogene sediments on the high plateau and contains Ͼ5,000...

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“…They were mainly generated between the Late Jurassic and the Early Tertiary as the result of the northward subduction, or possibly the breakoff of the Neo-Tethyan oceanic crust beneath the Lhasa Block Chung et al, 2005;Mo et al, 2008;Wen et al, 2008b;Ji et al, 2009a;Lee et al, 2009), and are considered to be an Andean-type arc magmatic belt (Wen et al, 2008b;Ji et al, 2009a). A period of magmatic quiescence between 40 and 25 Ma in the GBST (Chung et al, 2005) was followed in the Oligocene-Miocene ($26-8 Ma) by potassic or ultra-potassic volcanism (Turner et al, 1996;Miller et al, 1999;Ding et al, 2003;Gao et al, 2009;Zhao et al, 2009) and potassium-rich adakitic porphyries (Chung et al, 2003;Hou et al, 2004;Qu et al, 2004;Gao et al, 2007Gao et al, , 2010bGuo et al, 2007b;Xu et al, 2009). Adakitic porphyries associated with Cu-Au-Mo mineralization were mainly formed during $18-13 Ma Wang et al, 2010a).…”

Section: Geological Background and Sample Descriptionmentioning

confidence: 99%

Late Cretaceous (ca. 90Ma) adakitic intrusive rocks in the Kelu area, Gangdese Belt (southern Tibet): Slab melting and implications for Cu–Au mineralization

Jiang

Wang

et al. 2012

Journal of Asian Earth Sciences

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Cenozoic Volcanism in Tibet: Evidence for a Transition from Oceanic to Continental Subduction

Cited by 535 publications

References 108 publications

Geochemical variations in Miocene adakitic rocks from the western and eastern Lhasa terrane: Implications for lower crustal flow beneath the Southern Tibetan Plateau

Geochemical variations in Miocene adakitic rocks from the western and eastern Lhasa terrane: Implications for lower crustal flow beneath the Southern Tibetan Plateau

Constraints on the early uplift history of the Tibetan Plateau

Late Cretaceous (ca. 90Ma) adakitic intrusive rocks in the Kelu area, Gangdese Belt (southern Tibet): Slab melting and implications for Cu–Au mineralization

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