Paleomagnetism and neogene tectonics of the Northern Channel Islands, California

Kamerling, M. J.; Luyendyk, Bruce P.

doi:10.1029/jb090ib14p12485

Cited by 75 publications

(42 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is considered that both Mesozoic and Cenozoic strike-slip displacements along the Vizcaíno margin can account for the 131°c lockwise rotation of the San Roque pluton (Figures 12b and 13). A large degree of rotation, as observed in the San Roque pluton, has also been documented in ophiolitic sequences of northern California (119°; Mankinen et al 1991) and southern California Tertiary igneous rocks (>80°; Kamerling and Luyendyk 1985;Atwater 1998). Our result also supports previous interpretations that did not find significant latitudinal movement between Vizcaíno, the PRB, and mainland Mexico (i.e.…”

Section: Discussionmentioning

confidence: 90%

Palaeomagnetic assessment of plutons from the southern Peninsular Ranges batholith and the Jurassic Vizcaíno igneous suites, Baja California, México

Torres-Carrillo

Delgado-Argote

Böhnel³

et al. 2015

International Geology Review

View full text Add to dashboard Cite

We report geological and palaeomagnetic data from five discrete plutons in the southern part of the Peninsular Ranges batholith (PRB) and one pluton that is part of the Jurassic plutonic suite in the Vizcaíno peninsula. The PRB plutons are Cretaceous and belong to the Alisitos island arc. The Jurassic pluton intrudes a Triassic-Jurassic ophiolite.Our study was designed to evaluate the palaeomagnetic homogeneity of the batholith from the Sierra San Pedro Mártir, at~31°N, to about~28.3°N. The Punta Prieta, Nuevo Rosarito, San Jerónimo, and La Rinconada plutons in the western zone of the PRB are characterized by magnetizations residing in magnetite. The Compostela pluton is emplaced in a transition zone and has a magnetization that resides in haematite. The five Cretaceous plutons yield a combined palaeopole at 80.3°N, 162.1°E, A 95 = 9.8°, N = 5 that after correcting for the opening of the Gulf of California rotates to 77.6°N, 173.6°E, the rotated pole being in angular distance of only 4.4°from the North America reference pole. The Jurassic San Roque pluton yields a mean 0.6°N, 306.1°E, A 95 = 9.2°, N = 10, which is discordant, showing a clockwise rotation of about 131°± 16°and flattening of 9.5°± 12.9°with respect to the 150 Ma cratonic reference palaeopole. The results suggest that the intrusion of the undeformed Cretaceous Punta Prieta to Compostela plutons (128.1 ± 1.4 and 100.5 ± 2.7 Ma, respectively) restricts tectonic accretion of the Jurassic-Early Cretaceous sequences to the North America margin to the time before mid-Cretaceous magmatism (~100 Ma) in the PRB near present latitude 28°N. Mesozoic and Cenozoic strike-slip faulting along the Vizcaíno margin can account for the 131°clockwise rotation of the San Roque pluton. Our results do not support significant latitudinal movement between Vizcaíno, the PRB, and mainland Mexico with the exception of the Neogene San Andreas Fault-related right lateral movement. ARTICLE HISTORY

show abstract

Section: Discussionmentioning

confidence: 90%

Palaeomagnetic assessment of plutons from the southern Peninsular Ranges batholith and the Jurassic Vizcaíno igneous suites, Baja California, México

Torres-Carrillo

Delgado-Argote

Böhnel³

et al. 2015

International Geology Review

View full text Add to dashboard Cite

show abstract

“…Refugio-Santa Cruz: extending from the junction of the Little Pine and Santa Ynez faults westward to Point Arguello and Point Conception, including the offshore Santa Barbara Channel and Santa Cruz Island; abundant robust paleomagnetic data indicate rotation of 85°± 10° Kamerling and Luyendyk, 1985;Hornafius, 1985;Hornafius et al, 1986;Liddicoat, 1990;Whidden et al, 1995).…”

Section: Western Transverse Rangesmentioning

confidence: 99%

Kinematics of Transrotational Tectonism in the California Transverse Ranges and Its Contribution to Cumulative Slip Along the San Andreas Transform Fault System

Dickinson¹

1996

Kinematics of Transrotational Tectonism in the California Transverse Ranges and Its Contribution to Cumulative Slip Along the S

View full text Add to dashboard Cite

The evaluation of total tectonic transport across a complex transform fault system of finite width requires taking into account tectonic rotations about vertical axes of crustal blocks within the transform zone. The Luyendyk hypothesis of transrotation, based on paleomagnetic evidence for tectonic rotations within the Transverse Ranges, offers the means to reconcile disparate estimates of San Andreas transform motion based on (1) summation of fault offsets on land, and (2) global analysis of seafloor magnetic anomalies. In recent years, expanded geodetic data and improved global plate circuits have largely resolved the discrepancy for current transform motion rate, but not the discrepancy for cumulative transform slip through time.A coherent kinematic model for transrotational deformation developed in this paper indicates that discrepancies between overall displacements inferred from offsets of geologic features and from worldwide correlation of sea-floor magnetic anomalies can be reconciled for at least the past 16-22 m.y. by allowing explicitly for transrotational effects. All summations of fault displacements within the San Andreas system that do not take the paleomagnetic evidence for transrotation into account are discounted as incomplete. The kinematic model is compatible with a range of dynamic models for transrotation, and does not permit a choice to be made among alternate geodynamic rationales.The kinematic model includes preferred "pinned" and alternate "decoupled" geometric variants, and describes the movements of (1) structural panels bounded by sinistral faults and rotating clockwise, and (2) irrotational sliding blocks bounded by dextral faults subparallel to the San Andreas trend. Geometric expressions are presented for cumulative slip on the rotating sinistral faults and the nonrotating dextral faults, as the sliding blocks move out of the way of the rotating panels, in terms of initial and final angles between the trends of the sinistral and dextral faults, and for the spacings of the faults. The net shear imparted parallel to the transform direction by panel rotation within the shear system can also be calculated. Analysis shows that transpressional and transtensional deformation is the general rule within domains of both rotating panels and sliding blocks associated with transrotation.The application of the kinematic model to tectonic analyses of key geologic provinces yields the following comparative results. (1) Net slip on the array of eastwest sinistral faults in the eastern Transverse Ranges, but not the observed distribution of slip on individual faults of the array, is predicted successfully by calculations.(2) Net slip across northwest-trending dextral faults of the Mojave block is compatible with the transrotational shear imparted by the eastern Transverse Ranges, provided allowance is made for partial transposition of the shear locus through the

show abstract

“…From about 17 to 12 Ma, transpression along a restraining bend caused up to 95u clockwise vertical-axis rotation (Kamerling and Luyendyk 1985;Luyendyk 1991) and was accompanied by extension on both sides of the rotating crustal blocks. The Vaqueros Sandstone, Rincon Shale, and Monterey Formation accumulated as basin-plain, slope, bank, and shelf deposits at this time (Nagle and Parker 1971;Galloway 1998).…”

Section: Neogene Development Of the Ventura Basinmentioning

confidence: 99%

Processes of Sedimentation and Stratigraphic Architecture of Deep-Water Braided Lobe Complexes: The Pliocene Repetto and Pico Formations, Ventura Basin, U.S.A

Rotzien

Lowe

Schwalbach³

2014

Journal of Sedimentary Research

View full text Add to dashboard Cite

This paper reexamines the Pliocene Repetto and Pico formations, Ventura Basin, California, to evaluate the processes of sedimentation and interpret their environmental evolution within an elongate trough basin. Analysis of stratal architecture, lithofacies distributions, paleotransport directions, and measured sections from select stratigraphic intervals show that the two formations consist of sheet-like units, 20-50 m thick, composed of three main lithofacies associations: 1) structureless to graded gravelly sandstone, 2) thick-to medium-bedded sandstone composed principally of Bouma T a /T abc /Lowe S 3 divisions with thin mudstone layers, and 3) thin-to very thin-bedded sandstone and mudstone composed of Bouma T bcde divisions. At the bed-set level, clear trends in bed thickness cannot be recognized, but the lithofacies associations show fining-upward, coarseningupward, and symmetric stacking patterns, reflecting disorganization and frequently shifting sand and gravel depocenters, which are common trends in braided systems. Additionally, the frequent and shallow erosional features, widespread deposition, and paucity of wedge-shaped bedding geometries and associated laterally equivalent mud-rich units suggest that channel-levee elements were not present. Due to limited lateral and upslope data, the formations may represent up to three alternative depositional environments: 1) sedimentary fill of a channel that is wider than outcrop (greater than 4-5 km wide), 2) frontal lobes that necessitate at least one upslope channel, or 3) lobes emanating from canyon mouths in a loosely confined pattern. However, the flows were not affected by the margins if there existed a wide channel, and there is no evidence for channel-like incision in outcrop or core. Therefore, these units are interpreted as an unconfined network of coarse-grained, braided lobe complexes that formed elongate sedimentary aprons at the bases of canyons feeding the trough basin. This study describes deposits that are likely found in other elongate or high-latitude basins characterized by high rates of coarse-grained or clay-poor sedimentation, and is of interest to those working to understand the range of possibility in deep-water depositional systems.

show abstract

Paleomagnetism and neogene tectonics of the Northern Channel Islands, California

Cited by 75 publications

References 27 publications

Palaeomagnetic assessment of plutons from the southern Peninsular Ranges batholith and the Jurassic Vizcaíno igneous suites, Baja California, México

Palaeomagnetic assessment of plutons from the southern Peninsular Ranges batholith and the Jurassic Vizcaíno igneous suites, Baja California, México

Kinematics of Transrotational Tectonism in the California Transverse Ranges and Its Contribution to Cumulative Slip Along the San Andreas Transform Fault System

Processes of Sedimentation and Stratigraphic Architecture of Deep-Water Braided Lobe Complexes: The Pliocene Repetto and Pico Formations, Ventura Basin, U.S.A

Contact Info

Product

Resources

About