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NARROW
GeoRef Subject
-
all geography including DSDP/ODP Sites and Legs
-
Arctic Ocean
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Alpha Cordillera (1)
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Amerasia Basin (3)
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Barents Sea (1)
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Beaufort Sea (4)
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Chukchi Sea (2)
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Makarov Basin (1)
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Arctic region
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Russian Arctic
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Asia
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Far East
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Omolon River (1)
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Verkhoyansk Range (1)
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Atlantic Ocean
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Commonwealth of Independent States
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Russian Federation
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Kolyma Uplift (1)
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Krasnoyarsk Russian Federation
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Taymyr Dolgan-Nenets Russian Federation
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Omolon River (1)
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Russian Arctic
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Novaya Zemlya (1)
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Yakutia Russian Federation
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Verkhoyansk Range (1)
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Urals
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Cook Inlet (1)
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Franklin Mountains (3)
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North Slope (20)
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Pacific Ocean
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North Pacific
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Bering Sea
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Northeast Pacific
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Northwest Pacific
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West Pacific
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Red Dog Mine (16)
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Searles Lake (1)
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Brooks Range
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aluminum
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iron (1)
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lead
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Pb-206/Pb-204 (2)
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Pb-207/Pb-204 (1)
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Pb-207/Pb-206 (3)
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Pb-208/Pb-204 (1)
-
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platinum group
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osmium
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Os-188/Os-187 (2)
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rare earths
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Nd-144/Nd-143 (1)
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thallium (1)
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nitrogen (1)
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noble gases
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oxygen
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O-18/O-16 (5)
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sulfur
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S-34/S-32 (4)
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fossils
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Chordata
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Vertebrata (1)
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Graptolithina (1)
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Invertebrata
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Mesozoic
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Shublik Formation (8)
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Paleozoic
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Cambrian
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Carboniferous
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Lower Carboniferous
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Dinantian (1)
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Lower Mississippian
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Kayak Shale (8)
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Middle Mississippian
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Upper Pennsylvanian (1)
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Wahoo Limestone (2)
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Devonian
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Lower Devonian
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Oriskany Sandstone (1)
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Middle Devonian
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Upper Devonian
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Kanayut Conglomerate (4)
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Endicott Group (1)
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middle Paleozoic (2)
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Ordovician
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Echooka Formation (2)
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upper Paleozoic (3)
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upper Precambrian
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Proterozoic
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framework silicates
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silica minerals
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sheet silicates
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sulfates
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-
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Primary terms
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absolute age (27)
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Arctic Ocean
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Chukchi Sea (2)
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Lomonosov Ridge (2)
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Mid-Arctic Ocean Ridge (1)
-
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Arctic region
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Russian Arctic
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Asia
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Chukotka Russian Federation
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Far East
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Japan (1)
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Kolyma Uplift (1)
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Krasnoyarsk Russian Federation
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Taymyr Dolgan-Nenets Russian Federation
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Taymyr Peninsula (1)
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Omolon River (1)
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Siberia (1)
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Yakutia Russian Federation
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Verkhoyansk Range (1)
-
-
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Atlantic Ocean
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North Atlantic (1)
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Atlantic Ocean Islands
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South Sandwich Islands (1)
-
-
Australasia
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Australia
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Century Deposit (1)
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-
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New Zealand (1)
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barite deposits (16)
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biogeography (1)
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Canada
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Nunavut
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Queen Elizabeth Islands
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Sverdrup Basin (1)
-
-
Western Canada
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Canadian Cordillera (2)
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Northwest Territories (3)
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Yukon Territory (3)
-
-
-
carbon
-
C-13/C-12 (3)
-
C-14 (3)
-
organic carbon (1)
-
-
Cenozoic
-
Quaternary
-
Holocene
-
Neoglacial (1)
-
upper Holocene (1)
-
-
Pleistocene
-
Illinoian (1)
-
upper Pleistocene
-
Wisconsinan
-
upper Wisconsinan (1)
-
-
-
-
upper Quaternary (1)
-
-
Tertiary
-
lower Tertiary (1)
-
Neogene
-
Miocene (1)
-
-
Paleogene
-
Eocene (1)
-
Oligocene (1)
-
-
-
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Chordata
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Vertebrata (1)
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clay mineralogy (2)
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continental shelf (1)
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crust (7)
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data processing (2)
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faults (45)
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geochemistry (11)
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geochronology (13)
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geophysical methods (14)
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ground water (1)
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heat flow (1)
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volcanic rocks
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inclusions
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fluid inclusions (5)
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intrusions (5)
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Invertebrata
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Ptychopariida (1)
-
-
-
-
Brachiopoda
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Articulata (1)
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-
-
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Protista
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Foraminifera
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Fusulinina
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Radiolaria (4)
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isostasy (1)
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isotopes
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radioactive isotopes
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Be-10 (2)
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C-14 (3)
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Pb-206/Pb-204 (2)
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Pb-207/Pb-204 (1)
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Pb-208/Pb-204 (1)
-
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stable isotopes
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C-13/C-12 (3)
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Nd-144/Nd-143 (1)
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O-18/O-16 (5)
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Os-188/Os-187 (2)
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Pb-206/Pb-204 (2)
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Pb-207/Pb-204 (1)
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Pb-207/Pb-206 (3)
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Pb-208/Pb-204 (1)
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S-34/S-32 (4)
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Sr-87 (1)
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lineation (1)
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mantle (2)
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maps (1)
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marine geology (1)
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Mesozoic
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Cretaceous
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Hue Shale (1)
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Lower Cretaceous
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Aptian (1)
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Barremian (1)
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Hauterivian (1)
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Kemik Sandstone (1)
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Neocomian (1)
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Pebble Shale (1)
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Torok Formation (1)
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Valanginian (1)
-
-
Nanushuk Group (3)
-
Upper Cretaceous
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Brooks Range
Tectonochemistry of the Brooks Range Ophiolite, Alaska
A lateral well in the Shublik Formation, Alaska North Slope, with implications for unconventional resource potential
Surface to subsurface correlation of the Middle-Upper Triassic Shublik Formation within a revised sequence stratigraphic framework
Petroleum systems framework of significant new oil discoveries in a giant Cretaceous (Aptian–Cenomanian) clinothem in Arctic Alaska
U-Pb and oxygen isotope characteristics of Timanian- and Caledonian-age detrital zircons from the Brooks Range, Arctic Alaska, USA
A revised Triassic stratigraphic framework for the Arctic Alaska Basin
Multiscale crustal architecture of Alaska inferred from P receiver functions
Abstract This paper synthesizes the framework and geological evolution of the Arctic Alaska–Chukotka microplate (AACM), from its origin as part of the continental platform fringing Baltica and Laurentia to its southward motion during the formation of the Amerasia Basin (Arctic Ocean) and its progressive modification as part of the dynamic northern palaeo-Pacific margin. A synthesis of the available data refines the crustal identity, limits and history of the AACM and, together with regional geological constraints, provides a tectonic framework to aid in its pre-Cretaceous restoration. Recently published seismic reflection data and interpretations, integrated with regional geological constraints, provide the basis for a new crustal transect (the Circum-Arctic Lithosphere Evolution (‘CALE’) Transect C) linking the Amerasia Basin and the Pacific margin along two paths that span 5100 km from the Lomonosov Ridge (near the North Pole), across the Amerasia Basin, Chukchi Sea and Bering Sea, and ending at the subducting Pacific plate margin in the Aleutian Islands. We propose a new plate tectonic model in which the AACM originated as part of a re-entrant in the palaeo-Pacific margin and moved to its present position during slab-related magmatism and the southward retreat of palaeo-Pacific subduction, largely coeval with the rifting and formation of the Amerasia Basin in its wake. Supplementary material: Supplementary material Plate 1 (herein referred to as Sup. Pl. 1) comprises Plate 1 and its included figures, which are an integral part of this paper. Plate 1 contains regional reflection-seismic-based cross sections and supporting material that collectively constitute CALE Transects C1 and C2 and form an important part of our contribution. Plate 1 is referred to in the text as Sup. Pl. 1, Transects C1 and C2 as Plate 1A and 1B, and plate figures as fig. P1.1, fig. P1.2, etc.). Supplementary material 2 contains previously unpublished geochronologic data on detrital zircon suites and igneous rocks. Supplementary material are available at https://doi.org/10.6084/m9.figshare.c.3826813
Abstract Mid-Palaeozoic assembly models for the Arctic Alaska–Chukotka microplate predict the presence of cryptic crustal sutures, the exact locations and deformational histories of which have not been identified in the field. This study presents data on the provenance of polydeformed and metamorphosed strata in the southern Brooks Range Schist Belt and Central Belt of presumed Proterozoic–Devonian depositional age, as well as for the structurally overlying strata, to help elucidate terrane boundaries within the Arctic Alaska–Chukotka microplate and to add new constraints to the palaeogeographical evolution of its constituent parts. The protoliths identified support correlations with metasedimentary strata in the Ruby terrane and Seward Peninsula and suggest a (peri-) Baltican origin in late Neoproterozoic–early Palaeozoic time. Proximity to Laurentia is only evident in what are inferred to be post-early Devonian age strata. By contrast, the North Slope and Apoon terranes originated proximal to Laurentia. The mid-Palaeozoic boundary between these (peri-) Baltican and (peri-) Laurentian terranes once lay between rocks of the Schist/Central belts and those of the Apoon terrane, but is obscured by severe Mesozoic–Cenozoic deformation. Whether this boundary represents a convergent or transform suture, when exactly it formed and how it relates to broader Caledonian convergence in the North Atlantic are still unresolved questions. Supplementary material: Details of the analytical methods together with zircon U-Pb and Lu-Hf isotopic data tables are available at https://doi.org/10.6084/m9.figshare.c.3805696