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western Panama

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Journal Article
Journal: GSA Bulletin
Published: 01 July 1992
GSA Bulletin (1992) 104 (7): 814–828.
.... Consequences for the marine biota were profound, but, hitherto, correlation of the Pacific and Caribbean coastal sections has not been precise enough to track biologic patterns. We present here a correlation of 31 sections from the Pacific and Caribbean coasts of Costa Rica and western Panama. Using calcareous...
Journal Article
Journal: GSA Bulletin
Published: 01 March 2003
GSA Bulletin (2003) 115 (3): 271–287.
...Anthony G. Coates; Marie-Pierre Aubry; William A. Berggren; Laurel S. Collins; Michael Kunk Abstract A newly discovered sequence of lower to middle Miocene rocks from the eastern Bocas del Toro archipelago, western Panama, reveals the timing and environment of the earliest stages in the rise...
FIGURES | View All (7)
... toward the Middle America Trench by the Tertiary Osa-Caño Accretionary Complex. The paleomagnetic data are derived from Upper Cretaceous and Paleocene pelagic limestones. The Chorotega Terrane constitutes most of the southern Middle American Landbridge and was the western edge of the Caribbean plate...
Journal Article
Published: 01 August 1992
Journal of the Geological Society (1992) 149 (4): 569–579.
...M. J. DEFANT; T. E. JACKSON; M. S. DRUMMOND; J. Z. DE BOER; H. BELLON; M. D. FEIGENSON; R. C. MAURY; R. H. STEWART Abstract Oblique aseismic subduction below western Panama and southeastern Costa Rica has produced Recent arc-related volcanism. The aseismicity is probably related to the subduction...
Journal Article
Journal: Geology
Published: 01 June 1991
Geology (1991) 19 (6): 649–652.
...Jelle Zeilinga de Boer; Marc J. Defant; Robert H. Stewart; Hervé Bellon Abstract Widespread arc tholeiitic and calc-alkaline volcanism characterized the geologic evolution of western Panama and southeastern Costa Rica in middle to late Miocene and Quaternary time. Volcanism was and is clearly...
Journal Article
Journal: Geology
Published: 01 March 1994
Geology (1994) 22 (3): 263–266.
...Donald M. Fisher; Thomas W. Gardner; Jeffrey S. Marshall; Walter Montero P. Abstract We present kinematic data for late Cenozoic deformation in central Costa Rica that marks the western margin of the Panama microplate (i.e., the Caribbean-Panama boundary). This boundary extends from the North...
Journal Article
Journal: GSA Bulletin
Published: 01 October 1971
GSA Bulletin (1971) 82 (10): 2685–2712.
... American plate and the Pacific plate is partitioned into two types: (1) some underthrusting occurs along the northern extension of the Peru-Chile trench, and (2) right-lateral movement occurs along the Dolores-Boconó-El Pilar megashears. The western Cordillera of northern Ecuador and Colombia and eastern...
Image
(A) Map of southern Costa Rica and western Panama. X-X′ is the transect of receiver function (RF) results used in this study. Y-Y′ is the position of seismic stations used by Bourke et al. (2020) (Fig. S6 [see footnote 1]). Pink rectangle is the approximate area of the map in C. CCRDB NW and SE represent boundary limits of the Central Costa Rica Deformed Belt. Black circles are from the International Seismological Centre Reviewed Bulletin. (B) RF images for the transect from northwestern Costa Rica to Panama. Pulses M1, M2, and M3 are observable impedance boundaries beneath the transect. Red vertical line represents the position of the North Panama Deformed Belt (NPDB) offshore and CCRDB onshore. Station names and tectonic boundaries are shown above the transect. (C) Pierce points for 35 km depth. Purple circles are pierce points for the Panama microplate (PAN), and white circles are pierce points for the Caribbean plate (CAR).
Published: 02 March 2023
Figure 2. (A) Map of southern Costa Rica and western Panama. X-X′ is the transect of receiver function (RF) results used in this study. Y-Y′ is the position of seismic stations used by Bourke et al. (2020) (Fig. S6 [see footnote 1 ]). Pink rectangle is the approximate area of the map in C
Image
Figure 1. A, B, C, Trajana perideris (Dall), Kativa, western Panama, sand; length 27.0 mm. The siphonal canal is sealed. Vermeij collection. D, E, F, Turritriton gibbosum (Broderip), San Juan de La Costa, Baja California Sur, Mexico, 1995, intertidal; length 33.2 mm; long, dorsally moderately deflected canal. Vermeij collection. G, H, I, Terebralia sulcata (Born), Rendrag, Babeldaob, Palau, mangrove swamp; length 38.9 mm. The siphonal canal is dorsally deflected and sealed. Vermeij collection. J, K, L, Trichotropis insignis (Gould), 3 m depth, Lucky Point, Adak, 1987; diameter 21.3 mm. The aperture is abapically narrowed, but there is no siphonal indentation. Vermeij collection. M, N, O, Planaxis sulcatus (Born), Sella Bay, Guam, upper intertidal, 1981; length 28.6 mm. The siphonal indentation is very shallow and is reduced to a notch. Vermeij collection. P, Q, R, Vexillum plicarium (Linnaeus), Taneti, Maluku, Indonesia, intertidal seagrass bed; length 43.1 mm. Siphonal canal is somewhat dorsally deflected. Vermeij collection. S, T, U, Conus litteratus Linnaeus, Aimeliik Reef, Palau, 1970, in sand, length 71.0 mm. The siphonal indentation is secondarily absent, replaced by a rounded abapical apertural margin. Vermeij collection. V, W, X, Conus marmoreus Hwass, Airai, Palau, 1975, in sand; length 61.0 mm. The siphonal indentation is a deep notch. Vermeij collection
Published: 01 August 2007
Figure 1. A, B, C, Trajana perideris (Dall), Kativa, western Panama, sand; length 27.0 mm. The siphonal canal is sealed. Vermeij collection. D, E, F, Turritriton gibbosum (Broderip), San Juan de La Costa, Baja California Sur, Mexico, 1995, intertidal; length 33.2 mm; long, dorsally moderately
...: Higher values (>1) are typical between Guatemala and northern Costa Rica, whereas low values (most <0.5) typify central Costa Rica and western Panama. Because B/La is highly correlated with 10 Be/Be (r 2 = 0.94, excluding one sample), B/La may be a useful indicator of subduction contributions...
Journal Article
Journal: Economic Geology
Published: 30 November 2020
Economic Geology (2021) 116 (1): 199–209.
...Stewart D. Redwood; Jonathan R. Bryan; David M. Buchs; Colin Burge Abstract The giant Cobre Panama porphyry Cu-Mo-Au-Ag deposit in western Panama is hosted by an undated andesitic volcanic sequence, the Petaquilla batholith (32.20 ± 0.76–28.28 ± 0.61 Ma), and porphyry stocks (28.96 ± 0.62–27.48...
FIGURES | View All (7)
Journal Article
Journal: GSA Bulletin
Published: 01 March 2011
GSA Bulletin (2011) 123 (3-4): 703–724.
... evolution and oceanic plate interactions over the past 100 Ma in western Panama. An initial phase of intraplate magmatism, having geochemical characteristics of the Galápagos hotspot, formed the oceanic basement of the Caribbean large igneous province from 139 to 69 Ma. Younger accreted terranes...
FIGURES | View All (15)
Journal Article
Journal: Economic Geology
Published: 28 December 2020
Economic Geology (2021) 116 (1): 211–226.
... Pito porphyry copper and the Cerro Quema high-sulfidation epithermal deposit formed during the early arc stage (68–40 Ma) in the Chagres-Bayano arc (eastern Panama) and the Soná-Azuero arc (western Panama), respectively. They formed in a similar geodynamic setting at ~49 Ma, when diorites and quartz...
FIGURES | View All (9)
Journal Article
Journal: GSA Bulletin
Published: 01 July 1978
GSA Bulletin (1978) 89 (7): 981–999.
..., south of the western Panama Basin, where they are oriented 065°. Younger anomalies (5C to 5) in the eastern basin are approximately parallel to anomalies of this age identified on the Carnegie platform and the flanks of the Costa Rica rift. The eastern basin now contains a pattern of fossil spreading...
Journal Article
Journal: GSA Bulletin
Published: 01 October 1992
GSA Bulletin (1992) 104 (10): 1301–1314.
...WOLFGANG FRISCH; MARTIN MESCHEDE; MARC SICK Abstract The ophiolite complexes exposed along the Pacific coast of Costa Rica and western Panama evolved from Jurassic ocean floor to the island arc of the Tertiary to the present. We attribute Late Cretaceous volcanism to the Caribbean sill event...
Image
Figure 7. (A) Schematic paleogeographic reconstruction of the Isthmus of Panama at 15–16 Ma. Circles represent reliably dated sections that have yielded rich benthic foraminiferal assemblages useful for paleobathymetric analysis. The Central Cordilleran volcanic arc is shown as a line of islands; the triangles represent volcanoes. Evidence of middle Miocene volcanism in western Panama is from de Boer et al. (1988, 1991) and references therein. Land areas to the south of the arc are interpreted as exotic terranes. The Panamanian Isthmus at this stage was a volcanic island arc with a narrow neritic zone. The sedimentary rocks of the Southern Limón and Bocas del Toro Basins indicate bathyal paleodepths in contrast to the Panama Canal Basin, where neritic to emergent conditions persisted through most of the Cenozoic. (B) Schematic paleogeographic reconstruction of the Isthmus of Panama at 11–12 Ma. Symbols as for A. The neritic zone has by this time expanded significantly, and an emergent active volcanic backarc has developed in the Bocas del Toro Basin. We assume that the Central Cordilleran volcanic arc has become more emergent
Published: 01 March 2003
; the triangles represent volcanoes. Evidence of middle Miocene volcanism in western Panama is from de Boer et al. (1988, 1991) and references therein. Land areas to the south of the arc are interpreted as exotic terranes. The Panamanian Isthmus at this stage was a volcanic island arc with a narrow neritic zone
Journal Article
Published: 05 July 2017
Seismological Research Letters (2017) 88 (5): 1333–1338.
FIGURES
Image
Plot of Ta/Yb versus Th/Yb for magmatic rocks from central and western Panama. This diagram can be used to recognize arc magmas generated via subduction and fluid enrichment of a depleted to enriched mantle sources. Large symbols denote samples with &lt;57 wt% SiO2, whereas small symbols indicate samples with &gt;57 wt% SiO2. 40Ar/39Ar dated samples are denoted with crosses. CLIP—Caribbean large igneous province; OIB—ocean island basalt.
Published: 01 March 2011
Figure 7. Plot of Ta/Yb versus Th/Yb for magmatic rocks from central and western Panama. This diagram can be used to recognize arc magmas generated via subduction and fluid enrichment of a depleted to enriched mantle sources. Large symbols denote samples with <57 wt% SiO 2 , whereas small
Image
Trace element patterns, normalized to primitive mantle (Sun and McDonough, 1989), for igneous rocks from central and western Panama. Elements are plotted according to their decreasing incompatibility from left to right. Dark gray denote samples with SiO2 &lt;57 wt%, whereas pale gray indicate samples with SiO2 &gt;57 wt%. The light-gray field shows the Caribbean large igneous province data for reference. Literature data from the sources cited in the text are shown in black lines for comparison. CLIP—Caribbean large igneous province; OIB—ocean island basalt.
Published: 01 March 2011
Figure 6. Trace element patterns, normalized to primitive mantle ( Sun and McDonough, 1989 ), for igneous rocks from central and western Panama. Elements are plotted according to their decreasing incompatibility from left to right. Dark gray denote samples with SiO 2 <57 wt%, whereas pale
Image
FIGURE 1—Map of the Western San Blas area of Caribbean Panama (based on Anonymous, 1984 and Woodring, 1957). Numbered dots are the location of death-assemblage sampling sites for this paper. Sedimentary facies on the shelf include siliciclastic sediments (&lt;30% by weight carbonate; dark stipple), mixed sediments (30–50% by weight carbonate; light stipple), and carbonate sediments (&gt;50% by weight carbonate; white). Bathymetric contours (dashed lines) mark 20, 100, and 200 m. Land area shows local rivers (e.g., Rio Agua) and watershed (dotted line; X is high elevation point of 747 m)
Published: 01 December 2008
FIGURE 1 —Map of the Western San Blas area of Caribbean Panama (based on Anonymous, 1984 and Woodring, 1957 ). Numbered dots are the location of death-assemblage sampling sites for this paper. Sedimentary facies on the shelf include siliciclastic sediments (<30% by weight carbonate; dark