The Okhotsk Terrane is a continental block with Proterozoic basement which lies east of the South... more The Okhotsk Terrane is a continental block with Proterozoic basement which lies east of the South Verkhoyansk fold-and-thrust belt of eastern Siberia. It has been proposed that thrusting in the South Verkhoyansk occurred as a result of Late Jurassic-Early Cretaceous collision of the Okhotsk Terrane against the North Asia craton followed by plate convergence that produced the Uda-Murgal volcanic arc.
Mesozoic orogenic belts fringe the Alaska and eastern Russia portion of the Arctic Basin. From we... more Mesozoic orogenic belts fringe the Alaska and eastern Russia portion of the Arctic Basin. From west to east, these include the fold belts of Novaya Zemlya, Taimyr Peninsula, northern Verkhoyansk–Kolyma, Chukotka and the Brooks Range, as well as their continuations onto the continental shelves. The Taimyr and Novaya Zemlya structures were traditionally interpreted as the continuation of the late Palaeozoic Uralian orogenic belt. This is probably correct for Taimyr, but not for Novaya Zemlya, where shortening post-dates Uralian deformation. The Mesozoic tectonic evolution of the Verkhoyansk–Kolyma, Chukotka and Brooks Range orogens relates to the accretion of numerous continental and arc terranes to the Siberian and North American margins starting in the Late Jurassic and driven by palaeo-Pacific dynamics. This history is complicated by the opening of the Amerasia Basin of the Arctic, which displaced the Arctic Alaska–Chukotka microplate from a position adjacent to Arctic Canada towards the palaeo-Pacific. Although the Chukotka fold belt and the Brooks Range both formed along the southern edge of Arctic Alaska–Chukotka, most shortening took place prior to Amerasia Basin opening. The remoteness of this region and the complexity of its geology has left numerous questions regarding its tectonic evolution unresolved, providing rich avenues for future research.
The Circum-Gulf of Mexico and the Caribbean<subtitle>Hydrocarbon Habitats, Basin Formation and Plate Tectonics</subtitle>
... Fran ois Roure, 1 Nathalie Bordas-Lefloch, 2 Jaime Toro, 3 Charles Aubourg, 4 Nicole Guilhaum... more ... Fran ois Roure, 1 Nathalie Bordas-Lefloch, 2 Jaime Toro, 3 Charles Aubourg, 4 Nicole Guilhaumou, 5 Elisabeth Hernandez, 6 Sophie Lecornec-Lance, 1 Carlos Rivero, 6 Philippe Robion, 4 William ... Enrique Novoa and two anonymous reviewers provided helpful comments. ...
The Bucaramariga Fault is a large Late Tertiary strike-slip fault oriented N15W which ends in the... more The Bucaramariga Fault is a large Late Tertiary strike-slip fault oriented N15W which ends in the Cordillera Oriental of Colombia. It is believed to have about 100 km of left-lateral displacement. Based on detailed mapping of its termination, regional structural cross-sections, and gravity modeling of the area, I present a model for the geometry of the fault termination. Two reverse faults oriented N30E, the Soapaga and Boyacd faults, absorb about 40 km of strike-slip ‘ displacement on a 12 km deep detachment. These faults probably originated as Jurassic normal faults which were reactivated late in the Andean Orogeny. The Soapaga Fault cross-cuts and deforms the main strand of the Bucaramanga Fault probably as a result of motion on a younger strand of the strike-slip system, the Chicamocha Fault. The Bucaramanga Fault may have developed as an escape structure in response to accelerated compression and accretion of the Choco Block and Panama Arc against the western margin of Colombia...
The Devonian connection between the Brooks Range of Alaska, USA, with the continental margin of A... more The Devonian connection between the Brooks Range of Alaska, USA, with the continental margin of Arctic Canada and its subsequent Jurassic–Cretaceous counterclockwise rotation to form the Amerasian Basin, is a highly debated topic in Arctic tectonics. This resource-rich region was assembled from terranes that formed part of Laurentia or Baltica, or were juvenile oceanic arcs in the early Paleozoic that were brought together during Caledonian Orogenesis and the subsequent collision that formed Pangea (Uralide Orogeny). Elements of these orogens, as well as older ones, are predicted to occur in the Brooks Range of Arctic Alaska. This study presents the first combined zircon U-Pb and oxygen data from six Brooks Range metasedimentary units with assumed Neoproterozoic to Devonian ages. Three distinct detrital zircon patterns are identified in these units: (1) those with Neoproterozoic maximum depositional ages characteristic of the Timanide Orogen of northern Baltica and adjacent parts of...
The Okhotsk Terrane is a continental block with Proterozoic basement which lies east of the South... more The Okhotsk Terrane is a continental block with Proterozoic basement which lies east of the South Verkhoyansk fold-and-thrust belt of eastern Siberia. It has been proposed that thrusting in the South Verkhoyansk occurred as a result of Late Jurassic-Early Cretaceous collision of the Okhotsk Terrane against the North Asia craton followed by plate convergence that produced the Uda-Murgal volcanic arc.
Mesozoic orogenic belts fringe the Alaska and eastern Russia portion of the Arctic Basin. From we... more Mesozoic orogenic belts fringe the Alaska and eastern Russia portion of the Arctic Basin. From west to east, these include the fold belts of Novaya Zemlya, Taimyr Peninsula, northern Verkhoyansk–Kolyma, Chukotka and the Brooks Range, as well as their continuations onto the continental shelves. The Taimyr and Novaya Zemlya structures were traditionally interpreted as the continuation of the late Palaeozoic Uralian orogenic belt. This is probably correct for Taimyr, but not for Novaya Zemlya, where shortening post-dates Uralian deformation. The Mesozoic tectonic evolution of the Verkhoyansk–Kolyma, Chukotka and Brooks Range orogens relates to the accretion of numerous continental and arc terranes to the Siberian and North American margins starting in the Late Jurassic and driven by palaeo-Pacific dynamics. This history is complicated by the opening of the Amerasia Basin of the Arctic, which displaced the Arctic Alaska–Chukotka microplate from a position adjacent to Arctic Canada towards the palaeo-Pacific. Although the Chukotka fold belt and the Brooks Range both formed along the southern edge of Arctic Alaska–Chukotka, most shortening took place prior to Amerasia Basin opening. The remoteness of this region and the complexity of its geology has left numerous questions regarding its tectonic evolution unresolved, providing rich avenues for future research.
The Circum-Gulf of Mexico and the Caribbean<subtitle>Hydrocarbon Habitats, Basin Formation and Plate Tectonics</subtitle>
... Fran ois Roure, 1 Nathalie Bordas-Lefloch, 2 Jaime Toro, 3 Charles Aubourg, 4 Nicole Guilhaum... more ... Fran ois Roure, 1 Nathalie Bordas-Lefloch, 2 Jaime Toro, 3 Charles Aubourg, 4 Nicole Guilhaumou, 5 Elisabeth Hernandez, 6 Sophie Lecornec-Lance, 1 Carlos Rivero, 6 Philippe Robion, 4 William ... Enrique Novoa and two anonymous reviewers provided helpful comments. ...
The Bucaramariga Fault is a large Late Tertiary strike-slip fault oriented N15W which ends in the... more The Bucaramariga Fault is a large Late Tertiary strike-slip fault oriented N15W which ends in the Cordillera Oriental of Colombia. It is believed to have about 100 km of left-lateral displacement. Based on detailed mapping of its termination, regional structural cross-sections, and gravity modeling of the area, I present a model for the geometry of the fault termination. Two reverse faults oriented N30E, the Soapaga and Boyacd faults, absorb about 40 km of strike-slip ‘ displacement on a 12 km deep detachment. These faults probably originated as Jurassic normal faults which were reactivated late in the Andean Orogeny. The Soapaga Fault cross-cuts and deforms the main strand of the Bucaramanga Fault probably as a result of motion on a younger strand of the strike-slip system, the Chicamocha Fault. The Bucaramanga Fault may have developed as an escape structure in response to accelerated compression and accretion of the Choco Block and Panama Arc against the western margin of Colombia...
The Devonian connection between the Brooks Range of Alaska, USA, with the continental margin of A... more The Devonian connection between the Brooks Range of Alaska, USA, with the continental margin of Arctic Canada and its subsequent Jurassic–Cretaceous counterclockwise rotation to form the Amerasian Basin, is a highly debated topic in Arctic tectonics. This resource-rich region was assembled from terranes that formed part of Laurentia or Baltica, or were juvenile oceanic arcs in the early Paleozoic that were brought together during Caledonian Orogenesis and the subsequent collision that formed Pangea (Uralide Orogeny). Elements of these orogens, as well as older ones, are predicted to occur in the Brooks Range of Arctic Alaska. This study presents the first combined zircon U-Pb and oxygen data from six Brooks Range metasedimentary units with assumed Neoproterozoic to Devonian ages. Three distinct detrital zircon patterns are identified in these units: (1) those with Neoproterozoic maximum depositional ages characteristic of the Timanide Orogen of northern Baltica and adjacent parts of...
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