DOI: 10.1016/j.epsl.2018.07.001
Scopus记录号: 2-s2.0-85050001823
论文题名: Early Cretaceous origin of the Woyla Arc (Sumatra, Indonesia) on the Australian plate
作者: Advokaat E.L. ; Bongers M.L.M. ; Rudyawan A. ; BouDagher-Fadel M.K. ; Langereis C.G. ; van Hinsbergen D.J.J.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 498 起始页码: 348
结束页码: 361
语种: 英语
英文关键词: intra-oceanic arc
; paleomagnetism
; plate tectonics
; Sumatra
; Sundaland
; Woyla Arc
Scopus关键词: Geomagnetism
; Lime
; Intra-oceanic arc
; paleomagnetism
; Sumatra
; Sundaland
; Woyla Arc
; Tectonics
; Australian plate
; continental arc
; Cretaceous
; ocean basin
; paleomagnetism
; plate tectonics
; subduction zone
; tectonic reconstruction
; triple junction
; Greater Sunda Islands
; Sumatra
; Sunda Isles
英文摘要: Key to understanding the plate kinematic evolution of the Neotethys oceanic domain that existed between the Gondwana-derived Indian and Australian continents in the south, and Eurasia in the north, is the reconstruction of oceanic plates that are now entirely lost to subduction. Relics of these oceanic plates exist in the form of ophiolites and island arcs accreted to the orogen that stretches from Tibet and the Himalayas to SE Asia that formed the southern margin of Sundaland. The intra-oceanic Woyla Arc thrusted over western Sundaland – the Eurasian core of SE Asia – in the mid-Cretaceous. The Woyla Arc was previously interpreted to have formed above a west-dipping subduction zone in the Early Cretaceous, synchronous with east-dipping subduction below Sundaland. The oceanic ‘Ngalau Plate’ between the Woyla Arc and Sundaland was lost to subduction. We present paleomagnetic results from Lower Cretaceous limestones and volcaniclastic rocks of the Woyla Arc, Middle Jurassic radiolarian cherts of the intervening Ngalau Plate, and Upper Jurassic–Lower Cretaceous detrital sediments of the Sundaland margin. Our results suggest that the Woyla Arc was formed around equatorial latitudes and only underwent an eastward longitudinal motion relative to Sundaland. This is consistent with a scenario where the Woyla Arc was formed on the edge of the Australian plate. We propose a reconstruction where the Ngalau Plate formed a triangular oceanic basin between the N–S trending Woyla Arc and the NW-SE trending Sundaland margin to account for the absence of accreted arc rocks in the Himalayas. As consequence of this triangular geometry, accretion of the Woyla Arc to the western Sundaland margin was diachronous, accommodated by a southward migrating triple junction. Continuing convergence of the Australia relative to Eurasia was accommodated by subduction polarity reversal behind the Woyla Arc, possibly recorded by Cretaceous ophiolites in the Indo-Burman Ranges and the Andaman-Nicobar Islands. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109742
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Department of Earth Sciences, Utrecht University, Utrecht, 3584 CS, Netherlands; Geology Study Program, Institut Teknologi Bandung, Bandung, Jawa Barat 40132, Indonesia; Department of Earth Sciences, University College London, London, WC1E 6BT, United Kingdom
Recommended Citation:
Advokaat E.L.,Bongers M.L.M.,Rudyawan A.,et al. Early Cretaceous origin of the Woyla Arc (Sumatra, Indonesia) on the Australian plate[J]. Earth and Planetary Science Letters,2018-01-01,498