Oroclines and paleomagnetism in Borneo and South-East Asia

Hutchison, Charles S.

doi:10.1016/j.tecto.2010.10.008

Cited by 62 publications

(72 citation statements)

References 25 publications

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“…18-19), started 1203 with the obduction of the East Sulawesi Ophiolite at ~20 Ma (Oligocene to Miocene) in a continent-1204 continent collision setting (Bergman et al, 1996). The subsequent compressional deformation, and 1205 widespread oroclinal bending of Sundaland are discussed at length in Hutchison (2010) and The Sepik oceanic gateway is almost consumed along a north-dipping subduction zone, north of 1223 which the Proto Molucca Plate (PMOL) is consumed contemporaneously along the Philippine Arc. 1224 relates to how the east Asian margin transitioned from purely Andean-style subduction (Fig.…”

Section: Metcalfe 2002; Metcalfe and Irving 1990) The Paleomagnetimentioning

confidence: 99%

Tectonic evolution and deep mantle structure of the eastern Tethys since the latest Jurassic

Zahirovic

Matthews

Flament

et al. 2016

Earth-Science Reviews

173

225

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The breakup of Pangea in the Jurassic saw the opening of major ocean basins at the expense of older Tethyan and Pacific oceanic plates. Although the Tethyan seafloor spreading history has been lost to subduction, proxy indicators from multiple generations of Tethyan ribbon terranes, as well as the active margin geological histories of volcanism and ophiolite obduction events can be used to reconstruct these ancient oceanic plates. The plate reconstructions presented in this study reconcile observations from ocean basins and the onshore geological record to provide a regional synthesis, embedded in a global plate motion model, of the IndiaEurasia convergence history, the accretionary growth of Southeast Asia and the Tethyan-Pacific tectonic link through the New Guinea margin. The global plate motion model presented in this study captures the timedependent evolution of plates and their tectonic boundaries since 160 Ma, which are assimilated as surface boundary conditions for numerical experiments of mantle convection. We evaluate subducted slab locations and geometries predicted by forward mantle flow models against P-and S-wave seismic tomography models. This approach harnesses modern plate reconstruction techniques, mantle convection models with imposed one-sided subduction, and constraints from the surface geology to address a number of unresolved Tethyan geodynamic controversies. Our synthesis reveals that north-dipping subduction beneath Eurasia in the latest Jurassic consumed the Meso-Tethys, and suggests that northward slab pull opened the younger Neo-Tethyan ocean basin from ~ 155 Ma. We model the rifting of ' Argoland', representing the East Java and West Sulawesi continental fragments, as a northward transfer of continental terranes in the latest Jurassic from the northwest Australian shelf -likely colliding first with parts of the Woyla intra-oceanic arc in the mid-Cretaceous, and accreting to the Borneo (Sundaland) core by ~ 80 Ma. The Neo-Tethyan ridge was likely consumed along an intra-oceanic subduction zone south of Eurasia from ~ 105 Ma, leading to a major change in the motion of the Indian Plate by ~ 100 Ma, as observed in the Wharton Basin fracture zone bends. We investigate the geodynamic consequences of long-lived intra-oceanic subduction within the Neo-Tethys, requiring a twostage India-Eurasia collision involving first contact between Greater India and the Kohistan-Ladakh Arc sometime between ~ 60 and 50 Ma, followed by continent-continent collision from ~ 47 Ma. Our models suggest that the Sunda slab kink beneath northwest Sumatra in the mantle transition zone results from the rotation and extrusion of Indochina from ~ 30 Ma. Our results are also the first to reproduce the enigmatic Proto South China Sea slab beneath northern Borneo, as well as the Tethyan/Woyla slab that is predicted at mid-mantle depths south of Sumatra. Further east, our revised reconstructions of the New Guinea margin, notably the evolution of the Sepik composite terrane and the Maramuni subduction zone, produce...

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Section: Metcalfe 2002; Metcalfe and Irving 1990) The Paleomagnetimentioning

confidence: 99%

Tectonic evolution and deep mantle structure of the eastern Tethys since the latest Jurassic

Zahirovic

Matthews

Flament

et al. 2016

Earth-Science Reviews

173

225

View full text Add to dashboard Cite

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“…2). A prominent arcuate elevated orogenic zone extends from the north-west to the north-east, through central Borneo, forming part of the Interior Highlands of Borneo, named as the Sibu Zone in Sarawak (Haile, 1974;Hutchison, 2010) (Fig. 1).…”

Section: Geologymentioning

confidence: 99%

“…2) (Wolfenden, 1960;Haile, 1962;Hutchison, 2005). These turbidite formations are difficult to date because of the impoverished nature of the microfossil fauna that are often of long-lived 'flysch' foraminifera (Hutchison, 2010). In Sarawak, an angular unconformity separates the Rajang Group from the overlying Oligocene-age shallow marine sediments (Cullen, 2010) (Fig.…”

Section: Geologymentioning

confidence: 99%

“…2). The geology of central and north Sarawak is younger than that of west Sarawak and special note must be taken that much of the geologic mapping of interior Borneo has been carried out only on a reconnaissance scale since access to the interiors is still logistically difficult (Hutchison, 2010). The Miocene sediments in Sarawak consist mainly of shallow marine successions of sandstone, siltstone and clay (Fig.…”

Section: Geologymentioning

confidence: 99%

“…Recently, numerical models have provided insights into capture processes, large scale basin evolution and quantifying differential uplift rates (Giachetta et al, 2015). However, at present only visual observation using remotely sensed data can be used for most of Borneo because fieldwork retrieve initial input parameters for numerical models remains difficult (Hutchison, 2010;Cullen et al, 2013).…”

Section: Hypsometric Curves and Stream Profilesmentioning

confidence: 99%

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Active tectonic deformation along rejuvenated faults in tropical Borneo: Inferences obtained from tectono-geomorphic evaluation

et al. 2016

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Large fluctuations of shallow seas in low-lying Southeast Asia driven by mantle flow

Zahirovic

Flament

Müller

et al. 2016

Geochem. Geophys. Geosyst.

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The Sundaland continental promontory, as the core of Southeast Asia, is one of the lowest lying continental regions, with half of the continental area presently inundated by a shallow sea. The role of mantle convection in driving long-wavelength topography and vertical motion of the lithosphere in this region has often been ignored when interpreting regional stratigraphy, including a widespread Late Cretaceous-Eocene unconformity, despite a consensus that Southeast Asia is presently situated over a large-amplitude dynamic topography low resulting from long-term post-Pangea subduction. We use forward numerical models to link mantle flow with surface tectonics and compare predicted trends of dynamic topography with eustasy and regional paleogeography to determine the influence of mantle convection on regional basin histories. A Late Cretaceous collision of Gondwana-derived terranes with Sundaland choked the active margin, leading to slab breakoff and a 10-15 Myr-long subduction hiatus. A subduction hiatus likely resulted in several hundred meters of dynamic uplift and emergence of Sundaland between 80 and 60 Ma and may explain the absence of a Late Cretaceous-Eocene sedimentary record. Renewed subduction from 60 Ma reinitiated dynamic subsidence of Sundaland, leading to submergence from 40 Ma despite falling long-term global sea levels. Our results highlight a complete ''down-up-down'' dynamic topography cycle experienced by Sundaland, with transient dynamic topography manifesting as a major regional unconformity in sedimentary basins.

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Oroclines and paleomagnetism in Borneo and South-East Asia

Cited by 62 publications

References 25 publications

Tectonic evolution and deep mantle structure of the eastern Tethys since the latest Jurassic

Tectonic evolution and deep mantle structure of the eastern Tethys since the latest Jurassic

Active tectonic deformation along rejuvenated faults in tropical Borneo: Inferences obtained from tectono-geomorphic evaluation

Large fluctuations of shallow seas in low-lying Southeast Asia driven by mantle flow

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