Do transcurrent faults guide volcano growth? The case of NW Bicol Volcanic Arc, Luzon, Philippines

Pasquarè, Federico A.; Tibaldi, Alessandro

doi:10.1046/j.1365-3121.2003.00484.x

Cited by 46 publications

(33 citation statements)

References 27 publications

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“…This idea is consistent with numerical models of Hill (1977) and Shaw (1980) that suggest composite systems of tensional and shear fractures for dyke propagation, and it is also consistent with field data (e.g. Tibaldi and Romero-Leon, 2000;Pasquarè and Tibaldi, 2003;Lara et al, 2006) and geophysical data (Roman et al, 2004). In some strike-slip fault settings, volcanism has been associated with local dilation occurring at releasing bends and pull-apart basins Petrinovic et al, 2006;Busby and Bassett, 2007).…”

Section: Introductionsupporting

confidence: 85%

“…Labo and Mt. Caayunan volcanoes (Pasquarè and Tibaldi, 2003). The authors link the existence of these two volcanoes to the tectonic control exerted both by regional NW-directed main faults (sub-parallel to the PFS) and by NEtrending secondary faults roughly orthogonal to the PFS (Fig.…”

Section: Subduction Zonesmentioning

confidence: 99%

“…PFS = Philippine Fault System. Modified after Pasquarè and Tibaldi (2003) basal shape of the cone induced by strike-slip movement can be restored by faster reshaping processes due to the deposition of younger eruptive products. The authors report the case of the perfectly symmetrical Mayon volcano (Philippines), suggesting that it may already be internally deformed and its faultless appearance might be misleading in terms of risk assessment.…”

Section: Analogue Modellingmentioning

confidence: 99%

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Volcanism in Reverse and Strike-Slip Fault Settings

Tibaldi

Pasquarè

Tormey³

2009

New Frontiers in Integrated Solid Earth Sciences

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Traditionally volcanism is thought to require an extensional state of stress in the crust. This review examines recent relevant data demonstrating that volcanism occurs also in compressional tectonic settings associated with reverse and strike-slip faulting. Data describing the tectonic settings, structural analysis, analogue modelling, petrology, and geochemistry, are integrated to provide a comprehensive presentation of this topic. An increasing amount of field data describes stratovolcanoes in areas of coeval reverse faulting, and shield volcanoes, stratovolcanoes, and monogenic edifices along strike-slip faults, whereas calderas are mostly associated with pull-apart structures in transcurrent regimes. Physically-scaled analogue experiments simulate the propagation of magma in these settings, and taken together with data from subvolcanic magma bodies, they provide insight into the magma paths followed from the crust to the surface. In several transcurrent tectonic plate boundary regions, volcanoes are aligned along both the strikeslip faults and along fractures normal to the local least principal stress (σ 3 ). At subduction zones, intraarc tectonics is frequently characterised by contraction or transpression. In intra-plate tectonic settings, volcanism can develop in conjunction with reverse faults or strike slip faults. In most of these cases, magma appears to reach the surface along fractures striking parallel to the local σ 1 . In some cases, there is a direct geometric control by the substrate strikeslip or reverse fault: magma is transported beneath A. Tibaldi ( ) Department of Geological Sciences and Geotechnologies, University of Milan-Bicocca, Italy e-mail: alessandro.tibaldi@unimib.it the volcano to the surface along the main faults, irrespective of the orientation of σ 3 . The petrology and geochemistry of lavas erupted in compressive stress regimes indicate longer crustal residence times, and higher degrees of lower crustal and upper crustal melts contributing to the evolving magmas when compared to lavas from extensional stress regimes. Small volumes of magma tend to rise to shallow crustal levels, and magma mixing is common in the compressional regimes. In detailed studies from the Andes and Anatolia, with geographic and temporal coverage with which to compare compressional, transcurrent and extensional episodes in the same location, there do not appear to be changes to the mantle or crustal source materials that constitute the magmas. Rather, as the stress regime becomes more compressional, the magma transport pathways become more diffuse, and the crustal residence time and crustal interaction increases.

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Section: Introductionsupporting

confidence: 85%

Section: Subduction Zonesmentioning

confidence: 99%

Section: Analogue Modellingmentioning

confidence: 99%

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Volcanism in Reverse and Strike-Slip Fault Settings

Tibaldi

Pasquarè

Tormey³

2009

New Frontiers in Integrated Solid Earth Sciences

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“…In the absence of significant extension, the dike direction integrates the maximum principal stress s 1 . Although tectonic stresses may have the primary control on dike orientation [Delaney et al, 1986], it may also be influenced by gravitational stresses and/or the orientation of preexistent basement fractures [Pasquarè and Tibaldi, 2003;Tibaldi, 1995]. The orientation of dikes feeding polygenetic volcanoes can be easily determined by mapping associated parasitic vents.…”

Section: B3 Analysis Of Volcano Morphologymentioning

confidence: 99%

Kinematic constraints on intra‐arc shear and strain partitioning in the southern Andes between 38°S and 42°S latitude

2006

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[1] On the basis of structural field work, fault kinematic analysis, and the analysis of digital imagery, we describe the northern part of the southern Andean intra-arc Liquiñe-Ofqui Fault Zone (LOFZ) as an SC-like fault zone system accommodating part of the Nazca-South American plate convergence obliquity. Kinematic modeling suggests that the LOFZ accommodated 124 (+24/À21) km of dextral displacement between 40°S and 42°S and 67 (+13/À11) km between 38°S and 40°S since the Pliocene. Associated vertical axis rotations are 31 ± 4°c lockwise and 9 ± 1°counterclockwise along synthetic and antithetic faults, respectively. Mean Pliocene to recent shear rates along the LOFZ decrease northward from 32 ± 6 mm/yr to 13 ± 3 mm/yr compatible with partitioning of half of the convergence obliquity into the intra-arc zone north of 40°S and complete partitioning to the south. The displacement gradient along the intra-arc zone results in margin-parallel shortening of the fore arc.

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“…Many magmatic arcs are also characterized by significant strike-slip motion promoted by strain partitioning induced by the oblique convergence between the two interacting plates (e.g., McCaffrey, 1992;Lallemant, 1996;Acocella and Funiciello, 2010): examples include the Southern Andes, the Central American Volcanic Arc, the Mexican Trans Volcanic Belt, the Philippines, the Kurile arc and the Sumatra arc. These arcs undergoing strike-slip motions are known only in their very general features, with volcanism inferred to be often associated with local extension created by the activity of pullaparts, releasing bends or dilational jogs (i.e., DeMets, 1992;Tibaldi, 1992;Ego and Ansan, 2002;Pasquarè and Tibaldi, 2003;Corti et al, 2005;Rosenau et al, 2006;Cembrano and Lara, 2009;Tibaldi et al, 2010;Shabanian et al, 2012). These general relations between volcanism and strike-slip structures are largely confirmed by the deeper structure of extinct and eroded magmatic arcs: there pluton emplacement has been most commonly associated with the local extension created by strike-slip systems (e.g., Tobisch and Cruden, 1995;Acocella and Funiciello, 2010, and references therein).…”

Section: Introductionmentioning

confidence: 99%

Weak Tectono-Magmatic Relationships along an Obliquely Convergent Plate Boundary: Sumatra, Indonesia

et al. 2018

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The tectono-magmatic relationships along obliquely convergent plate boundaries, where strain partitioning promotes strike-slip structures along the volcanic arc, are poorly known. Here it is unclear if and, in case, how the strike-slip structures control volcanic processes, distribution and size. To better define the possible tectono-magmatic relationships along strike-slip arcs, we merge available information on the case study of Sumatra (Indonesia) with field structural data. The Sumatra arc (entire volcanic belt) consists of 48 active volcanoes. Of these, 46% lie within 10 km from the dextral Great Sumatra Fault (GSF), which carries most horizontal displacement on the overriding plate, whereas 27% lie at >20 km from the GSF. Among the volcanoes at <10 km from GSF, 48% show a possible structural relation to the GSF, whereas only 28% show a clear structural relation, lying in pull-aparts or releasing bends; these localized areas of transtension (local extensional zone) do not develop magmatic segments. There is no relation between the GSF along-strike slip rate variations and the volcanic productivity. The preferred N30 • -N40 • E volcano alignment and elongation are subparallel to the convergence vector or to the GSF. The structural field data, collected in the central and southern GSF, show, in addition to the dextral motions along NW-SE to N-S striking faults, also normal motions (extending WNW-ESE or NE-SW), suggesting local reactivations of the GSF. Overall, the collected data suggest a limited tectonic control on arc volcanism. The tectonic control is mostly expressed by the mean depth of the slab surface below the volcanoes (130 ± 20 km) and, subordinately, local extension along the GSF. The latter, when WNW-ESE oriented (more common), may be associated with the overall tectonic convergence, as suggested by the structural data; conversely, when NE-SW oriented (less common), the extension may result from co-and post-seismic arc normal extension, as supported by the 2004 mega-earthquake measurements. Overall, the strike-slip arc of Sumatra has intermediate features between those of extensional and contractional arcs.

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Do transcurrent faults guide volcano growth? The case of NW Bicol Volcanic Arc, Luzon, Philippines

Cited by 46 publications

References 27 publications

Volcanism in Reverse and Strike-Slip Fault Settings

Volcanism in Reverse and Strike-Slip Fault Settings

Kinematic constraints on intra‐arc shear and strain partitioning in the southern Andes between 38°S and 42°S latitude

Weak Tectono-Magmatic Relationships along an Obliquely Convergent Plate Boundary: Sumatra, Indonesia

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