Intracontinental quaternary volcanism in the niksar pull. Geothermal systems constrained by the sumatran fault and its pullapart basins in sumatra, western indonesia. Progresotumbes has been described as a pullapart subbasin. Failure of the composite pullapart basin model and the role of tlf in the ncb formation. The formation and evolution of the qiaojia pullapart. Geothermal systems constrained by the sumatran fault and. Sandbox analogue models of pullapart basins that developed in sedimentary strata above releasing steps in underlying basement faults are characterized by rhombic basins that are flatbottomed box grabens with a subhorizontal synkinematic basin infill. For the same purpose, the first use of the term pullapart basin by burchfiel and stewart. Pullapart basins and pushup swells are common features at steps along strikeslip faults.
The basin is divided from north to south into the paleogene santa elena sub basin, and the neogene progreso and tumbes subbasins. Several drill holes were used to reveal the internal structure of the basin. But implicit in the concept of a sedimentary basin is the existence of. Transform and transcurrentfault strikeslip basins relatively small, elongate, rapid subsidence 14. The spb have been developed as a transtensional pullapart basin resulted from stepping over of the semangko to ujung kulon segments of the sfz. This model involves marginal coarsegrained sedimentation adjacent to master faults, axial finegrained sedimentation away from. Extinction of pullapart basins in the sea of marmara. The centre of a rhomb graben is the site of greatest extension and subsidence across a pullapart structure. Discussion on structural development and stratigraphy of. Anderson and silver, 1979, this volume, extending from southeastern california and. Pull aparts evolve from incipient to extremely developed basins through a sequence of closely related states. The stepping over of the fault segments in these pull apart basins are performed by the eastward warping of. Progressive widening of pull apart basins is accommodated by formation of additional normal faults.
The erzincan, susehri, niksar, and lake hazar basins are actively evolving pull apart basins in eastern turkey. Mechanical aspects of pullapart basins and pushup swells with applications to the dead sea transform. Benavraham editor, sedimentary basins within the dead sea and other rift zones. These are related to a pullapart basin controlled by the xiaojiang strikeslip fault. The jogs and therefore the pullapart basins become extinct and strikeslip faults become straight as time passes. Synkinematic basin infill was added progressively as the models were deformed. Pull apart is a superior alternative to digging through a junk yard. In the third dimension, the depth of the pullapart basin is related to the length in an equation presented by. The peru bank is part of the cretaceouspaleogene assessment unit. Lithologic and structural attributes are consistent with deposition in a strikeslip pullapart basin.
An active composite pullapart basin within the central part of the north anatolian fault system. Finite element modelling of the pullapart formation. In general, formation of a pull apart basin needs stepping over of two fault segments. Frequently, the basins are rhombic or sigmoidal in shape. Pullapart basins at releasing bends of the sinistral late. Their structural, drainage, and depositional systems generally support a pull apart basin sedimentation model based on ancient pull apart basin deposits.
Basin analysis basin analysis is a process that requires the. Breaching of strikeslip faults and successive flooding of. So, get ready to experience some of anzaborregos most geologically rich areas on your. During the early stage, main displacement strikeslip faults are not linked with the normal faults that bound the edges of the pull apart basin. A pull apart basin is a structural basin where two overlapping en echelon faults or a fault bend creates an area of crustal extension undergoing tension, which causes the basin to sink down. Dec 30, 2014 quennell, who was the first to recognize a pullapart basin without using this term, proposed that the dead sea is a void in the crust caused by the overlapping segments of the dead sea fault zone. Structure of the dead sea pullapart basin from gravity. Reexamination of published seismic data in the southeasternmost segment of the active sumatra fault zone sfz reveals the characteristics of structural style and depositional history of semangko pull apart basin spb. Collett3 1department of mining and geological engineering, university of arizona, tucson, az 85721. Scaled sandbox models have successfully simulated the geometries and progressive evolution of pull apart basins developed in a weak sedimentary cover above rightstepping releasing dextral strikeslip fault systems in rigid basement. Geothermal systems constrained by the sumatran fault and its.
Structure of the dead sea pull apart basin from gravity analyses. New insights into the origin of the north anatolian shear zone. Tectonic basins and rift valleys landform britannica. Rhomboidal basins, which have larger basin length than the amount of motion, form in overlapping systems and do not progress through the spindle. It is followed, during upper oligocenelower miocene, by the main opening of the japan basin as a mega pullapart. In geology, a basin is a region where subsidence generates accommodation space for the deposition of sediments. The kashmir basin i s suggested to have formed through a piggyback basin deformation style, however new studies alam et al. Anderson and silver, 1979, this volume, extending from southeastern california and northwest. The new model is structurally impossibl e, an d conflicts with the geomorphology, geology, and tectonic setting of kashmir basin.
The basin is located within a valley which defines the dead sea transform plate boundary between africa and arabia. Penuh pull apart basin is situated north of the masurai volcanic cluster. Stop by to find used car parts or call us to get cash for your junk car today. Meanwhile, continued tectonic movement and space reduction of the basin floor may have triggered salt flowage and diapirism in. Pdf crossbasin faulting and extinction of pullapart. Tectonic evolution of the irra pullapart basin evidences of slip reversals on the romeral fault zone, northern part of andean central cordillera, colombia sierra et al 147 contains hyperconcentrated. Feb 28, 2011 a pull apart basin is a basin formed when a kink or bend in a strikeslip fault forms a releasing section with normal faults along strike. Our field investigations include determining the surface characteristics of the qiaojia basin which consists of three terrace sequences and a series of alluvial fans. Pdf development of pullapart basins dwight bradley. Pdf shape and dimensions of the cerro prieto pullapart. The steep sides are created by displacement on faults such that the valley floor moves down relative to the surrounding margins, or, conversely, the margins move up relative to the. Unlimited viewing of the articlechapter pdf and any associated supplements and figures.
Pull apart basins and pushup swells are common features at steps along strikeslip faults. A comparative study of well mapped active and ancient pull apart basins suggests a qualitative model for their continuous development. A comparative study of well mapped active and ancient pullapart basins suggests a qualitative model for their continuous development. Scale characteristics of pull apart basins in literature present good 2d relationships between basin length and width, and basin length and depth. These basins are called pull apart basins because the crust is literally pulled apart in the section between the two strikeslip faults.
A simple model suggests that the width of the rhombs is controlled by the initial fault geometry, whereas the. Mechanical aspects of pull apart basins and pushup swells with applications to the dead sea transform. It is followed, during upper oligocenelower miocene, by the main opening of the japan basin as a mega pull apart. Comparison of 3d data from the wellknown active and ancient pull apart basins suggests that there may be an empirical relationship among the length, width, and depth parameters in 3d.
We define this process of flooding of marine waters into an adjacent basin as breaching figs. Other articles where pull apart basin is discussed. Controls of pullapart basin size and subsidence rate on. An active composite pullapart basin within the central. A numerical study of strikeslip bend formation with. The inset map shows the regional tectonic setting of the study areain box. Geologists refer to this region as the salton trough, as it is located within an active pullapart basin. As large 4,000 km2 as the acve long valley ri volcanic center and pullapart basin, and similarly contains a caldera over part of the. The erzincan, susehri, niksar, and lake hazar basins are actively evolving pullapart basins in eastern turkey. Subsequent exploration and development provided data that support the concept that the natural gas fields in cottle and king counties, northcentral texas, mark the extent of a hydrocarbon system related to the broken bone graben, an elongate 180 km 2 pull apart basin in southeastern cottle county. Folds caused by minor wrench movements provided shoaling conditions along the southwest shallow carbonate shelf where porous algal mounds developed. Three hundred kilometers of continuous marine gravity data, collected in a lake occupying the northern part of the basin, were. The stratigraphic and structural characteristics of the.
This basin also becomes wider southward the nearest masurai volcanic cluster. They attributed both the basin opening and inversion to the indiaasia collision, assuming that the tectonic history of the basin was analogous to. Pull apart basin a continuum model of pull apart basin development had been proposed based on. Briefly, in this model, the sea of marmara has opened in a uniform manner as a. Progresotumbes has been described as a pull apart sub basin. Pull apart basins are depressions bounded on their sides by two or more strikeslip faults and on their ends by diagonal transfer faults. The silverpit crater consists of a set of concentric faults up to 20 km in diameter in the southern north sea. This simple block model shows a simple example of a pull. Conceptually, oblique rifting should lead to stepwise expansion of a nascent ocean basin by linking pullapart basins fig. The basin is divided from north to south into the paleogene santa elena subbasin, and the neogene progreso and tumbes subbasins. Pullapart is a superior alternative to digging through a junk yard. The rhombohedral shape of the japan basin and the particular tectonic behaviour of the margins on both east and west sides can be explained by an early eooligocene rifting of a pullapart basin accommodated along two large rightlateral shear zones, east of korea and west of.
Pages in category pull apart basins the following 7 pages are in this category, out of 7 total. A pullapart basin is a structural basin where two overlapping en echelon faults or a fault bend creates an area of crustal extension undergoing tension, which causes the basin to sink down. Smaller, comparable in volume to the acve lassen arc volcanic center and pull. Pullapart basin a continuum model of pullapart basin development had been proposed based on. Here, i compiled the major results on geometries of pullapart basins of previous workers and then examined the geometric characteristics of pullapart basins along the north anatolian fault zone. In the third dimension, the depth of the pull apart basin is related to the length in an equation presented by.
Although formerly described as the first impact structure to be recognized in the uk, its spatial association with local tectonic and stratigraphic features suggests that it is unlikely to have been caused by a random extraterrestrial event. Pullapart basins at releasing bends of the sinistral late jurassic mojavesonora fault system 101 spe39303 page 101 of the mojavesonora megashear silver and anderson, 1974. Field observations and analogue models show that in the later stages of this widening, the crossbasin faults cut the floor of the pullapart basins and link the offset principal displacement zones. Pull apart basins begin as a result of transformrelated tectonics and may culminate as rift zones mann et al. Discussion on structural development and stratigraphy of the.
Hein, in transform plate boundaries and fracture zones, 2019. Their structural, drainage, and depositional systems generally support a pullapart basin sedimentation model based on ancient pullapart basin deposits. Structural mechanism comprises overstep basin and faultbend basin figure 1. A simple model suggests that the width of the rhombs is controlled by the initial fault geometry, whereas the length increases with increasing fault displacement. Meanwhile, kinematic models include overlap of sidestepping faults, slip on divergent fault segments, and coalescence of scaledependent basins. Geometric characteristics of pullapart basins lithosphere. Tectonic basins and rift valleys, landforms characterized by relatively steep, mountainous sides and flat floors. Mechanical aspects of pullapart basins and pushup swells. The rhombohedral shape of the japan basin and the particular tectonic behaviour of the margins on both east and west sides can be explained by an early eooligocene rifting of a pull apart basin accommodated along two large rightlateral shear zones, east of korea and west of northeast japan and sakhalin. New and compiled map data from several areas, including the northern caribbean and turkey, suggests the following stages in pullapart development. As proposed by theoretical, experimental, and numerical. Shape and dimensions of the cerro prieto pullapart basin, mexicali, baja california, mexico, based on the regional seismic record and surface structures. Development of pullapart basins the journal of geology.
Pullaparts evolve from incipient to extremely developed basins through a sequence of closely related states. The tectonic framework of a complex pullapart basin. Pull apart basin tectonic model is structurally impossible. Subsequent exploration and development provided data that support the concept that the natural gas fields in cottle and king counties, northcentral texas, mark the extent of a hydrocarbon system related to the broken bone graben, an elongate 180 km 2 pullapart basin in southeastern cottle county. We model the threedimensional 3d crustal deformation in a deep pullapart basin as a result of relative plate motion along a transform system and compare the results to the tectonics of the dead sea basin. Development of pullapart basins article pdf available in the journal of geology 915 february 1983 with 3,088 reads how we measure reads. Pdf structure of the dead sea pullapart basin from. Pull apart basins at releasing bends of the sinistral late jurassic mojavesonora fault system 101 spe39303 page 101 of the mojavesonora megashear silver and anderson, 1974. Sedimentary basins range in size from as small as hundreds of meters to large parts of ocean. The merzifonsuluova active, composite pullapart basin, turkey 474 introduction.
Analyses and modeling of gravity data in the dead sea pullapart basin reveal the geometry of the basin and constrain models for its evolution. Pull a part is a superior alternative to digging through a junk yard. Present study is the first attempt to model numerically beng co pullapart basin in the southern tibet. The brittle upper crust is modeled by a boundary element.
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