Tectonics changes in NW South American Plate and their effect on the movement pattern of the Boconó Fault System during the Mérida Andes evolution

Javadi, Hamid; Foroutan, M.; Ashtiani, Marzieh Esterabi; Urbina, Jose Angel; Saïdi, A.; Faridi, Mohammad

doi:10.1016/j.jsames.2011.04.008

Cited by 9 publications

(5 citation statements)

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“…On the contrary, the third system was successful giving birth to the Neo‐Tethys Ocean [ Ricou , ] and the coeval detachment of the Cimmerian blocks from Gondwana [ Şengör , ] during the Late Permian. A few other Permian rift systems are also known elsewhere in Pangea, like for instance in the Cordilleran orogen of South America [ Limarino and Spaletti , 2006; Sempere , ; Javadi et al ., ] and along the northern margin of the Paleo‐Tethys Ocean [ Stämpfli and Kozur , ] (Figure ). Both are on the sites of potential back‐arc basins and are interpreted in the same way.…”

Section: Pangea Configuration and Style Of Permo‐carboniferous And Pementioning

confidence: 99%

Style of rifting and the stages of Pangea breakup

et al. 2015

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Pangea results from the progressive amalgamation of continental blocks achieved at 320 Ma.Assuming that the ancient concept of "active" versus "passive" rifting remains pertinent as end-members of more complex processes, we show that the progressive Pangea breakup occurred through a succession of rifting episodes characterized by different tectonic evolutions. A first episode of passive continental rifting during the Upper Carboniferous and Permian led to the formation of the Neo-Tethys Ocean. Then at the beginning of Triassic times, two short episodes of active rifting associated to the Siberian and Emeishan large igneous provinces (LIPs) failed. The true disintegration of Pangea resulted from (1) a Triassic passive rifting leading to the emplacement of the central Atlantic magmatic province (200 Ma) LIP and the subsequent opening of the central Atlantic Ocean during the lowermost Jurassic and from (2) a Lower Jurassic active rifting triggered by the Karoo-Ferrar LIP (183 Ma), which led to the opening of the West Indian Ocean. The same sequence of passive then active rifting is observed during the Lower Cretaceous with, in between, the Parana-Etendeka LIP at 135 Ma. We show that the relationships between the style of rifts and their breakdown or with the type of resulting margins (as magma poor or magma dominated) are not straightforward. Finally, we discuss the respective role of mantle global warming promoted by continental agglomeration and mantle plumes in the weakening of the continental lithosphere and their roles as rifting triggers.

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Section: Pangea Configuration and Style Of Permo‐carboniferous And Pementioning

confidence: 99%

Style of rifting and the stages of Pangea breakup

et al. 2015

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“…The inversion of slip sense along major strike‐slip faults is documented but relatively rare in the geoscientific literature [ Lacassin et al , ; Maruyama and Lin , ; Javadi et al , ]. The occurrence of this phenomenon is associated with the following tectonic scenarios: (1) the reactivation of ancient strike‐slip shear zones by a more recent tectonic event (inverted reactivation), (2) a change in rotation sense of fault‐bounded tectonic blocks in an evolving continental mobile belt (mobile belt inversion; MBI), and (3) the inversion of strike‐slip faults due to the passage of a triple junction along a convergent margin (plate margin inversion; PMI).…”

Section: Introductionmentioning

confidence: 99%

Tectonic reversal of the western Doruneh Fault System: Implications for Central Asian tectonics

et al. 2015

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The left-lateral Doruneh Fault System (DFS) bounds the north margin of the Central Iranian microplate and has played an important role in the structural evolution of the Turkish-Iranian plateau. The western termination of the DFS is a sinistral synthetic branch fault array that shows clear kinematic evidence of having undergone recent slip sense inversion from a dextral array to a sinistral array in the latest Neogene or earliest Quaternary. Similarly, kinematic evidence from the Anarak Metamorphic complex suggests that this complex initially developed at a transpressive left-stepping termination of the DFS and that it was inverted in the latest Neogene to a transtensional fault termination. The recognition that the DFS and other faults in NE Iran were inverted from dextral to sinistral strike slip in the latest Neogene and the likely connection between the DFS and the Herat Fault of Afghanistan suggests that prior to the latest Miocene, all of the north Iranian and northern Afghan ranges were part of a distributed dextral fault network that extended from the west Himalayan syntaxes to the western Alborz. Also, the recognition that regional slip sense inversion occurred across northern and northeastern Iran after the latest Miocene invalidates tectonic models that extrapolate Pleistocene to recent fault slip kinematics and rates back beyond this time.

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“…Lacassin, Replumaz & Leloup, 1998; Allen, Alsop & Zhemchuzhnikov, 2001; Maruyama & Lin, 2004; Javadi et al . 2011), the phenomenon, its nature and timing remain undocumented on the Turkish–Iranian plateau and are therefore not considered in tectonic models for the region. In this paper we document the evidence for the kinematic reversal of the Doruneh Fault System (DFS) (Wellman, 1965; also known as the Great Kavir fault by Stocklin & Nabavi, 1973), which presently indicates a left-lateral slip rate of about 2.4 ± 0.3 mm yr −1 (Fattahi et al .…”

Section: Introductionmentioning

confidence: 99%

History of faulting on the Doruneh Fault System: implications for the kinematic changes of the Central Iranian Microplate

et al. 2013

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The Doruneh Fault System is one of the major transcurrent faults in central Asia, extending ~900 km from western Afghanistan into West-Central Iran. The left-lateral Doruneh Fault System is also a key structure in the Arabia–Eurasia collisional zone, bounding the northern margin of the independent Central Iranian Microplate. The Doruneh Fault System exhibits a curved geometry, and is divided here into three segments: Eastern, Central and Western. We present the results of geological, structural and geomorphic studies into the nature of recent activity along the Doruneh Fault System segments. A surprising observation is that small, relatively young drainage systems often show recent systematic left-lateral displacement across the fault, whereas large rivers indicate a former more complex right-lateral history. Furthermore, the existence of right-lateral offsets of pre-Pliocene rocks and S-C fabrics confirm this earlier phase of right-lateral movement on the fault. We suggest that the early right-lateral kinematics resulted from an earlier NW–SE-directed regional shortening, associated with the anticlockwise rotation of the Central Iranian Microplate. The shortening is characterized by the NE–SW-striking en échelon folds within the fault slivers, the right-lateral Taknar imbricate fan and the superimposed folding exposed north of Kashmar. Thus, assuming an initiation age of Eocene (55.8 Ma) for the fault, we estimate a former right-lateral slip rate of about 5.2–5.5 mm yr−1, which accompanied the 35° anticlockwise rotation of the Central Iranian Microplate. According to our study, the youngest units exhibiting right-lateral displacement are Middle Miocene in age, suggesting a post-Middle Miocene timing for the onset of slip-sense inversion.

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Tectonics changes in NW South American Plate and their effect on the movement pattern of the Boconó Fault System during the Mérida Andes evolution

Cited by 9 publications

References 62 publications

Style of rifting and the stages of Pangea breakup

Style of rifting and the stages of Pangea breakup

Tectonic reversal of the western Doruneh Fault System: Implications for Central Asian tectonics

History of faulting on the Doruneh Fault System: implications for the kinematic changes of the Central Iranian Microplate

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