Nd isotope ratios are similar to those from the arc rocks of the wrangellia terrane (end +10 to +73) and are consistent with an island arc origin a key question regarding the peninsular terrane is the timing of its collision with southern alaska. 1 western mexico: the guerrero terrane (late mesozoic) jen lougen sarah black wil shaffer the guerrero terrane •late mesozoci • arc assemblages •3 subterranes. Cimmeria was an ancient continent, or, rather, a string of microcontinents or terranes, that rifted from gondwana in the southern hemisphere and was accreted to eurasia in the northern hemisphereit consisted of parts of what is today turkey, iran, afghanistan, tibet, shan–thai, and malay peninsula cimmeria rifted from the gondwanan shores of the paleo-tethys ocean during the carboniferous.
The largest uncertainty of tectonic and paleogeographic reconstructions concerns paleolatitudinal and longitudinal position of the jurassic island arc terranes such as the peninsular terrane and their distance from cratonic north america. Peninsular terrane william c mcclelland 1 and george e gehrels department of geosciences, university of arizona, that the crustal fragment evolved as an island arc complex, perhaps in proximity to the gondwana orogenic jurassic arc fragments and m61ange complexes (see reviews by burchfiel et al  and saleeby and busby-. The early jurassic talkeetna volcanic of an oceanic volcanic arc complex within the peninsular terrane of south-central alaska the section comprises a series of lavas, tuffs, and volcaniclastic debris-ﬂ ow and turbidite deposits, showing signiﬁ cant lateral facies hypothesis continues because island-arc crust is currently.
During the late pliensbachian, the peninsular terrane was an extremely dynamic island arc located in the northeastern paleo-pacific ocean a diverse suite of organisms inhabited its surrounding shallow waters. T1 - slab window migration and terrane accretion preserved by low-temperature thermochronology of a magmatic arc, northern antarctic peninsula au - guenthner,william r au - barbeau,david l. Upper jurassic fossils from the waipapa group of tawharanui peninsula, north auckland, new zealand the island arc 13:3, pages 416-431 crossref ken-ichi kano, yusaku paleomagnetic results from the waipapa terrane, northland peninsula, north island, new zealand: tectonic implications from widespread remagnetizations.
Geological gems of california state parks peninsular ranges geomorphic province along the western margin of the continent creating a volcanic island arc sediment and. The various narrow terranes are interpreted as the result of translation of fragments of larger terranes during two major tectonic events: (1) late jurassic to mid-cretaceous accretion of the wrangellia island arc composite terrane (or superterrane composed of the wrangellia, peninsular, and alexander terranes) and associated subduction zone. The roots of a mid-jurassic island arc, have been uplifted along the north dipping border ranges fault system and crop out peninsular terrane is to the north of the border ranges fault (brfs) the chugach terrane is to the south location of map is in area of cross section in figure 1. The volcanic arc terranes are similar to the accreted island-arc terranes termed wrangellia that lie between alaska and vancouver island however, based on the composition of volcanic and sedimentary rocks, the accreted terrane in idaho is not related to the wrangellia terrane.
The peninsular terrane includes triassic prearc oceanic basement, the jurassic talkeema island arc, and overlying sedi- mentary successions no precambrian crust is known to be part of this terrane, and the talkeetna arc is a typical example of an intra- oceanic arc subduction during arc magrnatism is considered to. The early jurassic talkeetna volcanic formation forms the upper stratigraphic level of an oceanic volcanic arc complex within the peninsular terrane of south-central alaska the section comprises a series of lavas, tuffs, and volcaniclastic debris-flow and turbidite deposits, showing significant lateral facies variability. Olyutorka-kamchatka terrane (island arc) (koryak highlands and kamchatka peninsula)—consists of a major sequence of late mesozoic and early cenozoic island arc volcanic and sedimentary rocks oko olyutorka subterrane (island arc) (koryak highlands, northeastern russian)—located in a large nappe obducted onto the ukelayat subterrane (turbidite basin) of the west kamchatka terrane. Terrane topic look up terrane in wiktionary, the free dictionary a terrane in geology , in full a tectonostratigraphic terrane is a fragment of crustal material formed on, or broken off from, one tectonic plate and accreted or sutured to crust lying on another plate.
Analysis of the upper jurassic naknek formation in the talkeetna mountains, peninsular terrane during accretion to the western north american continental mar-gin new geochronologic, sedimentologic, and compositional data deﬁ ne a two-part stratigraphy for the naknek formation sic intraoceanic island arc (talkeetna arc barker and. Wrangellia terrane topic the wrangellia terrane is a geologic concept encompassing a large arc of terrain extending from the south-central part of the us state of alaska through southwestern yukon and along the coast of british columbia in canada.
Abstract upper jurassic and lower cretaceous basinal strata are preserved in a discontinuous belt along the inboard margin of the alexander-wrangellia-peninsular terrane (awp) in alaska and western canada, on the outboard margin of terranes in the canadian cordillera accreted to north america prior to late jurassic time, and along the cordilleran margin from southern oregon to southern. The prince william sound and kenai peninsula region includes a significant part peninsula terrane and were interpreted by roeske and others (1989) to be part of a late triassic to early jurassic primitive island arc each of the metamorphic complexes, all of which are. The early to middle jurassic talkeetna arc section exposed in the island arc and to place constraints on the nature of parental magmas during the early to middle jurassic (plafker et al, 1989) the arc is part of the peninsular terrane, which formed the overriding plate during subduction of the oceanic. Plateau is that it erupted into an extinct island arc the continental equivalents of oceanic plateaus are sedimentation within the wrangellia terrane lasted until the early jurassic, when the resurgence of arc volcanism terrane of southeast alaska and the peninsular terrane of southern alaska by as early as the late triassic (plafker.