2011-11-3 vertical stratiﬁcation of composition, density, and inferred the jurassic talkeetna island arc in south-central alaska is an exhumed and tilted arc section where farallon plate beneath the peninsular terrane (clift et al 2005b plafker et al 1989) talkeetna arc mag. 1988-9-1 the thick (∼700 m) section of upper triassic (upper norian) carbonates, cherts, and volcaniclastics exposed at puale bay, alaska peninsula, preserves an excellent record of early mesozoic arc-related sedimentation on the peninsular terrane. Units in the central belt, which consists of triassic-jurassic metasedimentary turbidite assemblages that probably deformed in an accretionary prism setting, and cretaceous metasedimentary and metavolcanic units that represent the remnants of a continental margin arc.
2005-4-4 peninsular terrane in early jurassic time is in accor- dance to paleomagnetic data ( hillhouse and coe, 1994 ) and recent tectonic models ( cowan et al, 1997 . 2017-12-20 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. 2006-5-10 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.
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. 2003-2-26 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. 2005-2-18 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. 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. 2018-9-30 the wrangellia terrane (named for the wrangell mountains, alaska) is a terrane extending from the south-central part of alaska through southwestern yukon and along the coast of british columbia in canadasome workers contend that wrangellia extends southward to oregon, although this is not generally accepted.
2013-2-24 the sukhothai island arc system, including the linchang, the jurassic palaeogeographical reconstructions for the late palaeozoic and mesozoic illustrating the tectonic and palaeogeographical evolution of se asia are presented se asia is. 2015-7-20 record the growth and erosion of the early jurassic island arc a thinner, but still thick (as much as 5,400 m), sequence of definition and discussion of the alaska peninsula (peninsular) terrane in this paper is not without its difficul-ties as knowledge of the geology of the alaska peninsula and. A low-latitude position for the in summary, taxonomic composition of early jurassic peninsular terrane in early jurassic time is in accor- plant beds of closely similar age known from the talke- dance to paleomagnetic data (hillhouse and coe, 1994) etna arc is significantly different.
2018-3-23 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. 2012-3-12 several narrow terranes occur along the denali fault in the eastern and central alaska range in southern alaska these terranes are the aurora peak, cottonwood creek, maclaren, pingston, and windy terranes, and a terrane of ultramafic and associated rocks exterior to the narrow terranes to the south is the majorwrangellia island arc composite terrane, and to the north is the major yukon. 2010-7-26 although the triassic-jurassic magmatism is also considered to be arc related, it occurred over a very broad area of not only ytt, but also quesnellia, and the stikine, nisling, cache creek, and slide mountain terranes. 2012-2-6 crustal structure transition from oceanic arc to continental arc, eastern aleutian islands and alaska peninsula some of the excess mafic material in the island^arc crust can be attributed to pre-existing to the peninsular terrane along the border ranges. 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.
2018-10-12 historically sactive redoubt volcano is an aleutian arc basalt-to-dacite cone constructed upon the jurassic–early tertiary alaska–aleutian range batholith the batholith intrudes the peninsular tectonostratigraphic terrane, which is considered to have developed on oceanic basement and to have accreted to north america, possibly in late jurassic time. 2006-7-24 map of the tonsina-nelchina assemblage, a cross section of the jurassic talkeetna island arc the arc is located within the peninsular terrane and has been tlrust to the soutl over the chugach tenane along the border ranges fault. 2017-3-6 whereas the peninsular terrane is composed in large part of the volcanic rocks of an early jurassic island arc as a result in part of this tectonic setting, much disparity.
2009-5-9 during the late pliensbachian, the peninsular terrane was an extremely dynamic island arc located in the northeastern paleo-pacific ocean a diverse suite. 2014-9-5 jurassic position of the stikine terrane relative to rocks of cache creek affinity is uncertain (compare wernicke and klepacki  and oldow et al . 2011-11-20 the generation of high sr/y plutons following late jurassic arc–arc collision, klamath mountains, peninsular ranges) and closely follow major contractional events involving wallowa terrane is a composite island–arc system consisting of a. The southern peninsular terrane margin is underlain by rocks of the late triassic () and early jurassic talkeetna magmatic arc (talkeetna formation and border ranges ultra‐mafic‐mafic assemblage) on permian or older basement rocks.
2017-8-26 sedimentation and basin evolution along the mesozoic margin of western north america william l bilodeau composite intra-oceanic island-arc terranes during following the jurassic terrane accretions, east. 2006-10-11 division of geological &geophysical surveys publications can be inspected at the following anomalies of the peninsular terrane largely of the volcanic and plutonic rocks of a jurassic island arc with associated minor jurassic sedimentary rocks (detterman and hartsock,. 2018-9-12 the wrangellia terrane (named for the wrangell mountains, alaska) is a terrane extending from the south-central part of alaska through southwestern yukon and along the coast of british columbia in canada.