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El Pilar Fault

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... After the 9 July 1997 Ms 6.8 Cariaco earthquake in northeastern Venezuela, we undertook a multiple paleoseismic trench assessment on the newly ruptured portion of the dextral El Pilar fault. The surface rupture of that earthquake extended for 37 km from the seashore village of Villa Frontado...
Series: GSA Memoirs
Published: 01 January 1984
DOI: 10.1130/MEM162-p189
... The right-lateral El Pilar fault system extends from the Gulf of Cariaco in northeastern Venezuela to the east coast of Trinidad. The fault is seismically active, deforms Quaternary strata, and is the boundary between two very different geological provinces. North of the fault is the eastern...
Image
—Map of southeastern Caribbean region, showing well defined <span class="search-highlight">El</span> <span class="search-highlight">Pilar</span> <span class="search-highlight">fault</span> ...
Published: 11 November 1991
Figure 1 —Map of southeastern Caribbean region, showing well defined El Pilar fault zone trace (solid line) from Paria west and eastward continuation of El Pilar (dashes) postulated by Robertson and Burke (1989) . Teleseismic hypocenters (m[b] > 4.5) for events of depth less than 50 km from
Image
—Map showing locations of onshore area in <span class="search-highlight">El</span> <span class="search-highlight">Pilar</span> <span class="search-highlight">fault</span> zone, offshore are...
Published: 01 April 1989
Figure 2 —Map showing locations of onshore area in El Pilar fault zone, offshore area in North Coast marine area (NCMA), and wells used in this study. Wells shown are Occidental Chaconia-1, Occidental KK4-2, Deminex-Occidental-Agip KK4-3, Deminex-Agip consortium KK6-1, Deminex-Agip-Tenneco KK6-2
Image
—Segment of line 155 (unmigrated) across <span class="search-highlight">El</span> <span class="search-highlight">Pilar</span> <span class="search-highlight">fault</span> zone, which trends ...
Published: 01 April 1989
Figure 10 —Segment of line 155 (unmigrated) across El Pilar fault zone, which trends northeast at this location. We interpret structural style as that of positive flower structure. Strike-slip faults that trend northeast throughout the study area are compressional. See Figure 5 for location
Image
—Caribbean plate boundaries with <span class="search-highlight">El</span> <span class="search-highlight">Pilar</span> <span class="search-highlight">fault</span> zone expressing southeaster...
Published: 01 July 1983
Fig. 1 —Caribbean plate boundaries with El Pilar fault zone expressing southeastern margin of Caribbean plate (adapted from Bowen, 1976 ).
Image
—<span class="search-highlight">El</span> <span class="search-highlight">Pilar</span> <span class="search-highlight">fault</span> and related structures.
Published: 01 March 1956
FIG. 9. —El Pilar fault and related structures.
Series: AAPG Memoir
Published: 01 January 1995
DOI: 10.1306/M62593C36
EISBN: 9781629810836
... Abstract The eastern Venezuelan Coast Ranges result from oblique convergence along the South American-Caribbean plate boundary, expressed at the surface by the El Pilar dextral strike-slip fault. A crustal-scale, balanced NNW-SSE cross section has been constructed across this major transfer...
Series: AAPG Memoir
Published: 01 January 2021
DOI: 10.1306/13692249M1233851
EISBN: 9780891814283
... shortening uplifted the Central Range, formed prominent north-dipping thrusts, bounded by oblique ramps such as the Los Bajos right-lateral strike-slip fault and formed piggy-back basins. This north-northwest– south-southeast trend of compression is compatible with coeval right-lateral shear on the El Pilar...
FIGURES | View All (16)
Series: Geological Society, London, Special Publications
Published: 01 January 2009
DOI: 10.1144/SP328.23
EISBN: 9781862395763
... Venezuela at 17–15 Ma and progressed eastward to the El Pilar Fault by 12 Ma. Eastward motion of the Caribbean relative to South America was earlier accommodated by east-progressing, non-partitioned oblique subduction and collision, as illustrated today in eastern Venezuela around the Los Bajos–El Soldado...
FIGURES | View All (9)
Series: SEPM Special Publication
Published: 01 January 1998
DOI: 10.2110/pec.98.58.0045
EISBN: 9781565761810
...-west dextral strike slip faults, such as the Oca and El Pilar faults, and south-southeast ward-directed thrust nappes. The nappes loaded the South American craton to generate a coupled flexural foreland basin and peripheral bulge that migrated eastwards. At any time during this evolution, the zone...
Journal Article
Journal: AAPG Bulletin
Published: 01 March 1956
AAPG Bulletin (1956) 40 (3): 457–476.
...FIG. 9. —El Pilar fault and related structures. ...
FIGURES | View All (12)
Journal Article
Journal: AAPG Bulletin
Published: 01 August 1971
AAPG Bulletin (1971) 55 (8): 1336–1344.
... thrusting. There appears to be a close correlation with the El Pilar fault zone’s dextral (80–90°) movement and the resulting Andean deformational stresses. 1 Received, November 21, 1969; revised, August 26, 1970; accepted, September 14, 1970. 2 Department of Geology, Auburn University...
FIGURES | View All (5)
Journal Article
Journal: AAPG Bulletin
Published: 01 April 1989
AAPG Bulletin (1989) 73 (4): 490–509.
...Figure 2 —Map showing locations of onshore area in El Pilar fault zone, offshore area in North Coast marine area (NCMA), and wells used in this study. Wells shown are Occidental Chaconia-1, Occidental KK4-2, Deminex-Occidental-Agip KK4-3, Deminex-Agip consortium KK6-1, Deminex-Agip-Tenneco KK6-2...
FIGURES | View All (15)
Journal Article
Journal: GSA Bulletin
Published: 01 February 1975
GSA Bulletin (1975) 86 (2): 213–226.
... time but shows little sign of present-day tectonic activity. The Cariaco Trench is an extensional basin between the San Sebastian and El Pilar faults. The Curaçao Ridge is widest and thickest in the west (70° W.), where sediment to the north in the Venezuela Basin is thin. The ridge is narrow...
Journal Article
Journal: Geology
Published: 01 January 2001
Geology (2001) 29 (1): 75–78.
... along most of the plate boundary, significantly faster than the NUVEL-1A model prediction, but with similar azimuth. Pure wrenching is concentrated along the approximately east-striking, seismic, El Pilar fault in Venezuela. In contrast, transpression occurs along the 068°-trending Central Range (Warm...
FIGURES
Series: AAPG Memoir
Published: 01 January 2021
DOI: 10.1306/13692245M1233847
EISBN: 9780891814283
... subbasins. An Oligocene-to-middle Miocene inversion phase. Neogene transtension limited to the southern part of the study area and linked to a complex strain partitioning mechanism. This tectonic regime involves a right-lateral–strike-slip zone mostly associated with the El Pilar fault system...
FIGURES | View All (31)
Series: GSA Special Papers
Published: 01 January 2005
DOI: 10.1130/0-8137-2394-9.251
...-involved to non–basement-involved décollement tectonics. These hypotheses imply varying amounts of shortening along the Serranía to foreland ranging from 9% to 66% or 15–115 km oblique component of the El Pilar fault. ...
Series: GSA Special Papers
Published: 01 January 2005
DOI: 10.1130/0-8137-2394-9.315
... peak ages are southward-younging between 13 and 3 Ma. Cooling ages of these low-retentive grains are only recognized in the northern part of the thrust belt near the El Pilar fault, and therefore these young cooling ages may represent reworking of the thrust belt due to transpression along the plate...
Journal Article
Journal: AAPG Bulletin
Published: 01 May 1972
AAPG Bulletin (1972) 56 (5): 860–870.
... appears to be somewhat anomalous. For this area of eastern Venezuela no tectonic model has been made that can explain adequately the Anaco fault. I propose that the Anaco fault is the result of third-order, left-lateral strike-slip movement within the stress field generated by the first-order El Pilar...
FIGURES | View All (8)