Northern East Pacific Rise: Evolution from 25 m.y. B.P. to the present

Mammerickx, Jacqueline; Klitgord, Kim D.

doi:10.1029/jb087ib08p06751

Cited by 228 publications

(116 citation statements)

References 23 publications

(11 reference statements)

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“…The migration of the arc needs to be viewed in relation to the reorganization of the oceanic plates offshore, namely the ridge jumps at 25, 12.5-11, and 6.5-3.5 Ma MAMMERICKX and KLITGORD, 1982;MORAN-ZENTENO et al, 2007). The southern Mexican margin has undergone a major reshaping in Tertiary time (MORAN-ZENTENO et al, 1996).…”

Section: History Of Subduction In Mexicomentioning

confidence: 99%

An Evaluation of Proposed Mechanisms of Slab Flattening in Central Mexico

Skinner

Clayton

2010

Pure Appl. Geophys.

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Abstract-Central Mexico is the site of an enigmatic zone of flat subduction. The general geometry of the subducting slab has been known for some time and is characterized by a horizontal zone bounded on either side by two moderately dipping sections. We systematically evaluate proposed hypotheses for shallow subduction in Mexico based on the spatial and temporal evidence, and we find no simple or obvious explanation for the shallow subduction in Mexico. We are unable to locate an oceanic lithosphere impactor, or the conjugate of an impactor, that is most often called upon to explain shallow subduction zones as in South America, Japan, and Laramide deformation in the US. The only bathymetric feature that is of the right age and in the correct position on the conjugate plate is a set of unnamed seamounts that are too small to have a significant effect on the buoyancy of the slab. The only candidate that we cannot dismiss is a change in the dynamics of subduction through a change in wedge viscosity, possibly caused by water brought in by the slab.

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Section: History Of Subduction In Mexicomentioning

confidence: 99%

An Evaluation of Proposed Mechanisms of Slab Flattening in Central Mexico

Skinner

Clayton

2010

Pure Appl. Geophys.

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“…This volcanic belt had a longer activity between 24 and 12 Ma in southern Baja California compared to northern Baja California where Miocene (21 to 16 Ma) volcanism constituted several volcanic fields. The subduction in this region ended at about 12.9 Ma (Mammerickx and Klitgord, 1982;Calmus et al, 2003). Afterwards, a transform boundary was developed between Pacific and North America plates parallel to the Pacific margin of Baja California (Spencer and Normark, 1979).…”

Section: Tectonic Framework Of the Study Areamentioning

confidence: 99%

“…Based on the geochemical data, rock types were determined using SINCLAS computer program (Verma et al 2002(Verma et al , 2003, with the Middlemost (1989) In general, ~13 Ma BP is considered as the end of subduction along the northwestern Mexico (Mammerickx and Klitgord, 1982;Calmus et al, 2003). We have grouped our on-land basic rock samples in rocks of >13 Ma ages (as subduction-arc magmatism) and <13 Ma (as rift magmatism) to identify their diverse tectonic settings.…”

Section: Methodsmentioning

confidence: 99%

“…The west coast of northwestern Mexico has been a convergent plate boundary since mid-Cretaceous. The eastward subduction of oceanic lithosphere beneath western North America continued from the Cretaceous to about 29 Ma (Mammerickx and Klitgord, 1982). Towards the western part of northwestern Mexico, subduction related magmatism is represented by batholitic granitoids between 90 and 40 Ma (McDowell et al, 1997(McDowell et al, , 2001, whereas towards the east of the Baja California peninsula, a continuous subduction related magmatism during Eocene-Oligocene (between 38 and 23 Ma) has generated important inland magmatism along the Sierra Madre Occidental belt (McDowell and Keizer, 1977;Stock and Lee, 1994;Benoit et al, 2002).…”

Section: Tectonic Framework Of the Study Areamentioning

confidence: 99%

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Application of four sets of tectonomagmatic discriminant function based diagrams to basic rocks from northwest Mexico

Pandarinath

Verma²

2013

Journal of Iberian Geology

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Discrimination diagrams are being widely used for the past four decades to infer the tectonomagmatic affiliation of old rocks. There are several major-and trace-element composition based bivariate, ternary and multi-element discriminant function diagrams in the literature. Recent evaluation of the performance of these diagrams indicates that four sets of recent discriminant function based diagrams, in which the tectonic boundaries are determined from probability estimates for four tectonic settings of island arc, continental rift, ocean-island and mid-ocean ridge, have shown very high success rates. In this work, we have created an extensive geochemical database for on-land and off-shore basic rocks of northwest Mexico and applied these four sets of recent and highly successful tectonomagmatic discriminant function based diagrams to infer their tectonomagmatic origin. Each of these four sets of diagrams (two for major-and two for trace-elements) contained five diagrams. All the four sets of diagrams confirmed a continental rift setting for on-land basic rocks of <13 Ma age, with success rates of 71%-93% and 58%-90% for major-element and traceelement based diagrams, respectively. For the on-land basic rocks of >13 Ma age, major-element based diagrams also indicated a rift setting. However, one set of trace-element based discrimination diagrams indicated an arc to rift transition and the other set of trace-element based discrimination diagrams for the only sample from the Comondú arc, which has the required complete dataset, indicated an arc setting. All the four sets of discrimination diagrams indicated MORB setting (success rates 90%-98% and 100% for major-element and trace-element based diagrams, respectively) for off-shore rocks (most of the samples were obtained from DSDP drilled sites in the Gulf of California and some dredged rock samples from the Gulf of California) with very high success rates. All the inferred tectonic settings from these four sets of new discrimination diagrams, in general, are in conformity with those reported in the literature based on other methods. The results show that these discrimination diagrams may successfully discriminate the original tectonic setting of comparatively younger and older on-shore rocks as well as sea-water altered deep-sea rocks and dredged material.

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“…Moreover, Klitgord and Mammerickx (1982) published that the lithosphere of the Rivera Plate consumed at the trench dates as late as Miocene (approx. 9 Ma), whereas the Cocos crust near the Rivera Plate is 10 Ma and progressively becomes older to the SE, being 25 Ma old at 90°W (Pardo and Suárez 1995;Mammerickx and Kiltgord 1982 Lépinay et al 1997). From the Pliocene-Quaternary limit (approx.…”

Section: Geological Settingmentioning

confidence: 99%

Crustal Architecture at the Collision Zone Between Rivera and North American Plates at the Jalisco Block: Tsujal Project

Dañobeitia

Bartolomé

Prada

et al. 2016

Pure Appl. Geophys.

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Abstract-Processing and analysis of new multichannel seismic records, coincident with wide-angle seismic profiles, acquired in the framework of the TsuJal project allow us to investigate in detail the complex structure of the oceanic domain in the collision zone between Rivera Plate and Block Jalisco at its northern termination. The subducting Rivera Plate, which is overridden by the North American Plate-Jalisco Block, is clearly identified up to 21.5°N (just south of Maria Magdalena Island) as a two clear reflections that we interpret as the interplate and Moho discontinuities. North of the Tres Marias Islands the seismic images display a different tectonic scenario with structures that are consistent with large faulting and rifted margin. A two-dimensional velocity approach for the crustal geometry is achieved using joint refraction/reflection travel time tomography, the uncertainty of the results is assessed by means of Monte Carlo analysis. Our results show an average oceanic crustal thickness of 6-7 km with a moderate increase towards the Jalisco Block, an anomalous thick layers (*3.0 km) displaying a relatively low velocity (*5.5 km/s) underneath Maria Magdalena Rise, and an estimated Moho depth deeper than 15 km in the collision zone between Rivera Plate and Jalisco Block. We have also determined an anomalous crust on the western flank of the Tres Marias Islands, which may be related to the initial phases of continental breakup of the Baja California Peninsula and Mexico mainland. High-resolution bathymetry provides remarkable images of intensive slope instabilities marked by relatively large slides scars of more than 40 km 2 extent, and mass-wasting deposits probably triggered by the intense seismicity in the area.

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Northern East Pacific Rise: Evolution from 25 m.y. B.P. to the present

Cited by 228 publications

References 23 publications

An Evaluation of Proposed Mechanisms of Slab Flattening in Central Mexico

An Evaluation of Proposed Mechanisms of Slab Flattening in Central Mexico

Application of four sets of tectonomagmatic discriminant function based diagrams to basic rocks from northwest Mexico

Crustal Architecture at the Collision Zone Between Rivera and North American Plates at the Jalisco Block: Tsujal Project

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