Collisions between oceanic island arc terranes and passive continental margins are thought to have been important in the formation of continental crust throughout much of earths history. Collision of oceanic plates or oceanocean convergence formation of volcanic island arc s. Continental collision and the stepwise evolution of convergent. Middle miocene intrusion of the maramuni arc along the png margin followed see figure 2 for references. Article pdf available in geological society london special publications. This highly seismogenic subduction zone setting and continental collision has produced a very complex geologic history but is an ideal locale to study the transition from subduction to arc continent collision. New marine observations and tectonic evolution introduction arc continent collision and arc accretion along most continental margins mark the early episodes of mountain building. Angelier editor, geodynamic evolution of the eastern eurasian margin.
Pdf kinematics of arccontinent collision, flipping of. The west himalaya, in northern pakistan, consists of three tectonic units. Geological arguments against subductionun derthrusting have emphasized the importance of crustal shortening and deformation in the fore. Arccontinent collision and arc accretion along most continental margins. The second stage involves the collision between the indian continent together with the merged island arc and the asian continent at approximately 33 ma. Island arc will never collide with an active continental margin. Arccontinent collisions, sediment recycling and the maintenance of the continental. Geotectonic evolution of late cenozoic arccontinent.
From arccontinent collision to continuous convergence, clues. Collision of continent and arc, or continent arc convergence. Crustal structure of the caribbeannortheastern south. If you are viewing the pdf of this paper or reading it offline, please visit 10. Banda arc experiment transitions in the banda arcaustralian. Geochemical and tectonic relationships in the east indonesian arc continent collision region 101 gin where timor is situated now fig.
Pdf continental collision, orogenesis and arc magmatism. A new definition of the younger maud belt as distinct from the older namaquanatal belt can be proposed. Arc continent collision has been stated to be one of the most important tectonic processes in the formation and growth of continental crust brown and ryan 2011, and the crucial question of how. Buy arccontinent collision frontiers in earth sciences on free shipping on qualified orders. Horizontal tectonic displacements arc proved by ophiolitic nappes which traveled at least several tens and perhaps a few hundreds of kilometers. Particularly, arccontinent collisions in the tropics, such as the indonesian orogenic system today, are ephemeral on geological time scales, and when they drift out of the tropics or exhumation ceases and topography is eroded away, earth returns to a nonglacial climate state. The island arc continent collision is described here, the continent continent collision later. When two continental plates collide neither plate can be subducted due to their high bouyancy.
Use features like bookmarks, note taking and highlighting while reading arccontinent collision frontiers in earth sciences. Due to tectonic stresses as one tectonic plate rides over another, forearc regions are sources for great thrust earthquakes. The banda arc colliding with timor and new guinea also represents present day arc continent collision. A forearc is the region between an oceanic trench and the associated volcanic arc. Lowlatitude arc continent collision as a driver for global. It is suggested that the rate of convergence between plates controls the rate at which the collision zone is laterally propagated. Tectonic implications of the composition of volcanic arc magmas j. Island arc continent collision closure of the tethys ocean and subsequent collision of india with asia produced the himalayan mountain chain. South china, including ophiolites, arc volcanic and intrusive rocks and subsequent bimodal magmatism, we identi. Accreted microplateterrane terranesand mountain building. The distribution of the ophiolite fragments and related rocks of oceanic affinity in northern britain is illustrated in figure 5. Christeson,1 paul mann,1 alejandro escalona,1,2 and trevor j. History of subduction polarity reversal during arc. Pdf arccontinent collisions, sediment recycling and the.
The third section contains two papers, one that deals with the obduction of largeslab ophiolites and a second that presents a wide range of physical models of arc continent collision. Combining this structural information with processoriented numerical modelling. This region occupies the sundabanda arc transition, which extends between the eastern sunda arc island of flores and western banda arc island of wetar fig. Arc continent collisions occur commonly in the platetectonic cycle and result in rapidly formed and rapidly collapsing orogens, often spanning just 515 my. In the collision belts that can be studied in continental domains, the finite deformation exposed is very com. Because the subduction zone dips east, the island arc has attempted to. Understanding continentcontinent convergence is important to understand the formation of the himalayas, the alps, the urals and the atlas mountains. In total 110 these sum to almost 16,000 km of margin table 1. The active collision between the luzon arc and the asian continent in the taiwan area is investigated in terms of plate. Is taiwan the result of arccontinent or arcarc collision.
Magmatic evolution during this stage of the platetectonic cycle is evident in several areas of the ordovician grampiantaconic orogen, as we demonstrate in the first detailed geochemical study of. This analysis reveals a strong correlation between the extent of glaciation and arc continent collisions in the tropics. Arccontinent collision in banda sea region1 aapg bulletin. Continentcontinent convergence or the himalayan convergence.
Examples of former sites of arccontinent collisions are in northern. Arccontinent collision has been one of the important tectonic processes in. Continental collision is a phenomenon of the plate tectonics of earth that occurs at convergent boundaries. Collision of continental and oceanic plates or ocean continent convergence formation of continental arc s and fold mountains. Transition from subduction to arccontinent collision. Still other regions, usually containing an abundance of intrusive igneous material, show associations of lowpressure greenschist. From convergent plate margin to arccontinent collision. Paleogeography of the indiaasia collision system wikipedia. Geodynamics of an early eocene arccontinent collision.
Continental collision is the main mechanism for generation of many granulite grade metamorphic belts, as the volcanic arc environment has characteristic properties appropriate for generation of the granulites bohlen, 1987. Continuous continental arc magmatism in the maud belt is tectonically unrelated with the accretion of oceanic island arcs and final continent continent collision in the natal belt. Arccontinent collision frontiers in earth sciences. Hall, 1997, which in the png mobile belt is recorded by rapid early miocene cooling of medium to highgrade metamorphic rocks figure 2. Pdf is taiwan the result of arccontinent or arcarc. Arccontinent collision frontiers in earth sciences 2011. Request pdf arccontinent collision arccontinent collision has been one of the important tectonic processes in the formation of mountain belts throughout.
Abers lamontdoherty earth observatory of columbia university, palisades, new york robert mccaffrey rensselaer polytechnic institute, troy. Growth of continental masses through arc continent collision is widely thought to be a major process governing the structural and geochemical evolution of the continental crust over geologic time. Four geodynamic processes, starting from intraoceanic subduction before latest miocene, through to initial arccontinent collision, advanced arccontinent collision, and to the final arc collapsesubduction in the last 2 ma, have been sequentially operating southward from 2430. Earthquakes, gravity anomalies, and fault kinematics in the huonfinisterre collision zone, papua new guinea geoffrey a. Continents in collision modelling processes at a destructive convergent plate margin some of the earths most dramatic and damaging events take place at destructive plate margins where two continents collide. The uralide orogen of russia contains wellpreserved examples of paleozoic arc continent collisions. Oceancontinent subductionzone continental volcanic arc subductionand mountain building andeantype mountain building building a continental volcanic arc subduction and partial melting of mantle rock generate primary magmas magma is less dense than surrounding rock, so it begins to buoyantly rise. Crustal structure of the caribbeannortheastern south america. Tens of millions of years later, the americas would come smashing into the merged euroafrican continent, pushing up a new ridge of himalayanlike mountains along the boundary. Crustal structure of the caribbeannortheastern south america arc continent collision zone gail l. We present a new compilation of magnetic, geologic, gps and seismic data and propose that the geometry and kinematics of the taiwan arccontinent collision are dominated by the partial subduction of a continental margin promontory and associated fracture zone. Upon continental or arccontinent collision, alongtrench.
Arccontinent collision has been one of the important tectonic processes in the formation of mountain belts throughout geological time, and it continues to be so today along tectonically active plate boundaries such as those in the sw pacific or the caribbean. The philippine island arc system is a good laboratory for testing the viability of using geochemical data to extract this information. In many instances, panafrican metamorphism resulted in granulite formation, suggesting crustal overthickening due to continent continent collision. These occur when one plate is pulled down subducted where it meets another, usually producing earthquakes and volcanic eruptions. Grenvilleage continental arc magmatism and crustal. Johnson and jaques, 1980, or alternatively, to lithospheric delamination and adiabatic decompression of the mantle following arc continent collision cloos et al. Arccontinent collision, continentcontinent collision an. However, the tectonic evolution of arc continent collision is commonly oversimpli. Natural examples and modelling of arccontinent collision show that there is a large degree of, and variation in, complexity that depend on a number of key firstorder parameters and the nature. Pdf preserved collisional crustal structure of the. Why then has one arc continent collision given rise to a worldclass petroleum system whereas the other has yet to realize major potential. Field analyses of stratigraphy, structure, and tectonic geomorphology of savu island define the age and provenance of accreted australian continental margin sequences and overlying synorogenic cover, and the structure, kinematics, and uplift history of the transition from subduction to collision in the eastern sundabanda arc.
Lowlatitude arccontinent collision as a driver for global cooling. Transition from subduction to arc continent collision geosphere, june 2009 153 1982. The paleogene arc continent collision suggests that the indian continent experienced a twostage collision. The subsequent arc continent collision resulted in the development. A reevaluation of arc continent collision and along arc variation in the bismarck sea region, papua new guinea holm, r. In practice this means the 108 neotethyan belts of the mediterranean, the middle east and himalayas, as well as taiwan 109 and the ryukyu arc, northern borneo and the australiapapua new guinea region. Arc continent collision a paleogene conglomeraticsandy succession preserves the complex record of arc continent collision, orogen collapse and basin opening, followed by inversion related to renewed oblique convergence.
In this lesson, well discuss continental collision and what may result. Leigh royden, department of earth, atmospheric and planetary sciences, massachusetts institute of technology, ma, usa. The collision of two continental plates occurs when a sea becomes narrower until both plates collide. Much like the collision of a car, when continents collide the results are quite dramatic. May 09, 2014 leigh royden, department of earth, atmospheric and planetary sciences, massachusetts institute of technology, ma, usa. Continental collision, orogenesis and arc magmatism of the miocene maramuni arc, papua new guinea article pdf available in gondwana research 283. Structure and tectonics of the indian continental crust and its adjoining region, 2018. Arccontinent collision frontiers in earth sciences kindle edition by brown, dennis, ryan, paul d download it once and read it on your kindle device, pc, phones or tablets. Continental collision is a variation on the fundamental process of subduction, whereby the subduction zone is destroyed, mountains produced, and two continents sutured together. Dec 17, 2019 collision of oceanic plates or oceanocean convergence formation of volcanic island arc s.
Fragments of diverse origin which have come together as a result of the collision of a continental fragment with the philippine mobile belt make up the philippine island arc system. Pdf processes of arccontinent collision in the uralides. To better constrain global weatherability through time, the paleogeographic position of all major phanerozoic arc continent collisions was reconstructed and compared to the latitudinal distribution of ice sheets. Origin of geochemical variability by arccontinent collision in the. Lowlatitude arccontinent collision as a driver for global cooling oliver jagoutza,1, francis a. This record is unique because both arc and continental margin are now severely fragmented and only partially exposed. However, following terminal island arc continent collision in the early pliocene, leftlateral movement along both the sorong and ransiki fault zones of 300 km resulted in the westwards movement of the tamrau, tosem, and arfak blocks to their current position dow and sukamto, 1984. Macdonaldb, and leigh roydena adepartment of earth, atmospheric, and planetary sciences, massachusetts institute of technology, cambridge, ma 029. According to the geodynamic model, both of the observed tectonic events i. Preserved collisional crustal structure of the southern urals revealed by vibroseis profiling. Eastcontinent has also come onto the cross section, but it is still far away. Crustal structure of the caribbeannortheastern south america arccontinent collision zone gail l. For example, taiwan manifests the active accretion of a volcanic arc onto the east margin of eurasia.
At that point, most of the worlds landmass would be joined into a super continent called pangea ultima. The island of timor is a modern example of arccontinent collision be tween the banda arc and the australian margin carter et al. Arccontinent collision and the formation of continental. We consider one of them, the ongoing arc continent collision in taiwan, and argue that this process occurs according to the second scenario corresponding to the. Continental collision an overview sciencedirect topics. Chapter 7 the nature of the banda arccontinent collision in. Oceanocean convergence and volcanic island arc formation. Arccontinent collision ebook by dennis brown rakuten kobo. Continental collision, orogenesis and arc magmatism of the.
The distribution of the ophiolite fragments and related rocks of oceanic affinity in northern britain is. The history of cenozoic magmatism and collision in nw new. The necessary condition of a collision of an island arc and opposite continent is an oceanward dip of a subduction zone from a continent to an ocean fig. In the northeast sector of the scs, taiwan arc continent collision predominates at present due to collision between the luzon arc and a 250km long northsouth segment of the eurasian margin lee. Arc continent collision has been one of the important tectonic processes in the formation of mountain belts throughout geological time, and it continues to be so today along tectonically active plate boundaries such as those in the sw pacific or the caribbean. Geochemical and tectonic relationships in the east. The collision might also trap an inland ocean, scotese said. The second section presents eight examples of arc continent collisions that range from being currently active through to palaeoproterozoic in age.
Abers lamontdoherty earth observatory of columbia university, palisades, new york robert mccaffrey rensselaer polytechnic institute, troy, new york abstract. Timor represents the earliest stages of arc accretion compared to other modern an alogues such as taiwan and new guinea, because only the banda forearc is. Geotectonic evolution of late cenozoic arccontinent collision in taiwan. Arccontinent collisions, sediment recycling and the.
In such cases, cessation of subduction typically corresponds to a collision, facilitated by the arrival of a lowerplate arc, continent, or ocean plateau into the subduction zone e. The tagil arc in the middle urals formed as an intraoceanic arc from the late ordovician through the devonian and appears to have collided with the. With this type of collision there are no features such as a subduction zone, trench or acretionary wedge. Collision of continental plates or continent continent convergence formation of fold mountains. Forearc regions are found at convergent margins, and include any accretionary wedge and forearc basin that may be present.
Arc continent collision is one of the most fundamental tectonic processes for the formation of new land, and the preservation on land of fragments of oceanic lithosphere ophiolites. We consider one of them, the ongoing arccontinent collision in taiwan, and argue that this process occurs according to the second scenario corresponding to the. Natural examples and modelling of arc continent collision show that there is a large degree of, and variation in, complexity that depend on a number of key firstorder parameters and the nature. The first stage involves the collision with an intraoceanic island arc in the tethys ocean at approximately 55 million years ago. A reevaluation of arccontinent collision and alongarc. In northern central america, the geology of the suture zone between the chortis block and the exotic siuna intraoceanic arc indicates that the two terranes were assembled together during a hauterivian arc. Mass 33 balancing across the taiwan collision zones suggests that almost 90% of the colliding luzon 34 arc crust is accreted to the margin of asia in that region. These two periods of arccontinent collision, as well as the associated changes in. Key to maintaining the volume of 32 the continental crust is the accretion of oceanic arcs to continental passive margins. Yuan c a department of geosciences, national cheng kung university, taipei, taiwan, roc b central geological survey, moea, taipei, taiwan c institute of marine geology and chemistry, national sun yatsen university, kaohsiung, taiwan.
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