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Wednesday, November 18, 2020 | History

4 edition of Geology adjacent to the western margin of the Shiswap metamorphic complex (parts of 82L, M) found in the catalog.

Geology adjacent to the western margin of the Shiswap metamorphic complex (parts of 82L, M)

Bradford J. Johnson

Geology adjacent to the western margin of the Shiswap metamorphic complex (parts of 82L, M)

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  • 37 Currently reading

Published by Province of British Columbia, Ministry of Energy, Mines, and Petroleum, Mineral Resources Division, Geological Survey Branch in Victoria .
Written in English

    Places:
  • British Columbia,
  • Shuswap Lake Region.
    • Subjects:
    • Geology -- British Columbia -- Shuswap Lake Region.

    • Edition Notes

      Statementby Bradford J. Johnson.
      SeriesOpen file,, 1990-30, Open file (British Columbia. Geological Survey Branch) ;, 1990-30.
      Classifications
      LC ClassificationsQE187 .J57 1990
      The Physical Object
      Pagination16 p. :
      Number of Pages16
      ID Numbers
      Open LibraryOL1461359M
      ISBN 100771889666
      LC Control Number93118762
      OCLC/WorldCa28183655

        Intrusive Igneous Bodies In most cases, a body of hot magma is less dense than the rock surrounding it, so it has a tendency to move very slowly up toward the surface. It does so in a few different ways, including filling and widening existing cracks, melting the surrounding rock (called country rock [1]), pushing the rock aside (where it Author: Steven Earle. The earliest recognizable event in the region was the Ubendian Orogeny, cMa, which generated the NW-SE-trending fold belt of high-grade metamorphic rocks that demarcates the north-eastern margin of the Bangweulu Block. The next major orogenic event was the Irumide Orogeny which resulted in extensive folding and shearing of Basement. Rocks encountered in the Addie-Willets area of western North Carolina include migmatitic amphibolite gneisses, and highly deformed and variably altered dunites and pyroxenites of the WebsterAddie ultramafic complex. Detailed mapping results indicate that both mafic and ultramafic rocks occur as discrete cm- to km-scale bodies, locally in contact with each other, but more commonly enclosed in Cited by: 4.


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Geology adjacent to the western margin of the Shiswap metamorphic complex (parts of 82L, M) by Bradford J. Johnson Download PDF EPUB FB2

Its western margin is marked by the Granby fault, an Eocene west-dipping, low-angle, normal fault characterized by brittle deformation.

The metasediments of the Grand Forks complex consist of migmatitic paragneiss containing a peak metamorphic assemblage of garnet + cordierite + sillimanite + K-feldspar ± biotite + by: The western margin of the Shuswap metamorphic complex was exhumed from midcrustal levels in the Eocene along a km-long, west-dipping, low-angle detachment system (Johnson and Brown, ).

Herein, we refer to the segment south of 51°N latitude as the Okanagan Valley shear zone, including a 1–2-km-thick distributed brittle to ductile shear zone (Fig.

1 ; Brown et al., ).Cited by: 2. The central Karakoram can be divided into three main tectonic units from north to south: a northern Karakoram terrane, the Karakoram batholith, and the Karakoram metamorphic complex. In the Baltoro Glacier region the Karakoram magmatism includes intrusive suites that predate and postdate the India-Eurasia collision.

Geology Adjacent to the Western Margin of the Shuswap Metamorphic Complex (parts of NTS 82L, M) E; F; G; J; K; L; M; N; O; C; D The earliest structures common to both parautochthon and allochthon are syn-metamorphic east-verging folds concentrated immediately adjacent to the boundary, and these are believed related to initial convergence.

These early folds, the boundary, and metamorphic isograds are refolded by west-verging folds that control the present map : John V. Ross, S. Garwin, P. Lewis. Detailed structural and petrologic mapping near Azure Lake, British Columbia provides an overview of geologic relations along the northeast margin of the Shuswap Metamorphic Complex.

Four phases of deformation have been recognized in the Shuswap Complex and the adjacent lower grade metasediments of the cover sequence. The first deformation consists of west-verging isoclinal folds. Johnson, B. Progress report: stratigraphy and structure of the Shuswap metamorphic complex in the Hunters Range, eastern Shuswap Highland (82L).

In: Geological Fieldwork, British Columbia Ministry of Energy, Mines and Petroleum Resources, Paper –1, 55– Google ScholarCited by: @article{osti_, title = {Geology of the Mother Load gold belt and adjacent foothills metamorphic belt, California}, author = {Landefeld, L.A.}, abstractNote = {The late Jurassic Mother Lode gold-quartz vein system south of the Consumnes River is hosted by portions of 1) a submarine volcanic arc and overlying epiclastic basin, and 2) the ultramafic-mafic plutonic subarc basement.

() infer deposition in an active margin along the western side of Pangea. In an attempt to provide additional constraints, we present geochemical data for Carboniferous rocks in the western part of the Acatlán complex associ-ated with clastic detritus derived mainly from the adjacent Oaxacan complex, Maya block and high grade metamorphic.

trench zone. The north arm, the western part of central Sulawesi and the south arm constitute the inner arc, comprises a low-pressure metamorphic belt formed beneath a volcanic chain in the adjacent island arc or continental margin. He inferred that these components of a paired metamorphic belt were present, but dismembered by a great fault.

The Clachnacudainn complex is a local structural and metamorphic culmination adjacent to the Monashee complex near Revelstoke, British Columbia. The western margin of the Grand Forks complex is the west-dipping Granby fault, which juxtaposes low-grade rocks of Quesnel Terrane to the west against the high-grade gneisses of the complex.

Figure 1: Map of the southeastern British Colombia showing the occurrence of the Shuswap-type metamorphic core complexes in the southern Omineca Size: 1MB. Johnson, B.J. (): Geology Adjacent To the Western Margin of the Shuswap Metamorphic Complex; BC Ministry of Energy, Mines and Petroleum Resources, Open FilescaleGeophysics Maps.

The Eocene Okanagan Valley shear zone (OVSZ) is a major extensional detachment within the southern Canadian Cordillera in British Columbia. The OVSZ delineates the western margin of the Shuswap metamorphic complex juxtaposing mid-crustal, sillimanite-gradecrystalline rocks against dominantly non-metamorphosed sedimentary and volcanic rocks.

Thus, phase three folds caused tightening-up of the previously formed absolute age of these deformations is not yet known, but the Shuswap Complex, at its eastern margin, is shown to Author: John V. Ross. Metamorphism and deformation on the northwest margin of the Shuswap metamorphic complex Azure Lake, British Columbia Lee Case Pigage.

QE P52 Geology of the Kelowna area and origin of the Okanagan Valley, British Columbia / Murray A. Roed ; with contributions from Don A. Dobson. The Albion (Idaho), Grouse Creek, and Raft River Mountains host one of the major metamorphic core complexes in the western U.S. A metamorphic core complex is an area from a few miles to over 50 miles across characterized by a core of highgrade metamorphic rock, several miles of vertical uplift, and capping “shells” of highly sheared, attenuated, and variably metamorphosed.

The Eocene Okanagan Valley shear zone (OVSZ) is a major extensional detachment within the southern Canadian Cordillera in British Columbia.

The OVSZ delineates the western margin of the Shuswap metamorphic complex juxtaposing mid-crustal, sillimanite-gradecrystalline rocks against dominantly non-metamorphosed sedimentary and volcanic : Sarah Ruth Brown.

At Hoskins Creek, the Monashee décollement splays westward from the fault zone and then runs southward along the western margin of the Monashee Complex. On the east side, the Selkirk allochthon is a composite of four tectonic by: The mountains of the Betic in southern Spain and the Rif in northern Morocco surround the Alboran Sea to form an arc shape orogenic belt in the westernmost Mediterranean (Figure 5).

This belt marks the western terminus of the Alpine orogen. Geology of the Akolkolex River area. (Bulletin - Ministry of Mines and Petroleum Resources ; and is part of the structural - metamorphic transition between the Shuswap Metamorphic Complex to the west and the Selkirk Mountain Fold and Thrust Belt to the The Akolkolex River area is located on the western margin of the Selkirk Mountains.

Carbonate rocks of the Sauk Sequence lurk just outside the northern confines of the park as the Inwood Marble. The three sequences constitute parts of an evolving passive margin that changed over to a convergent margin during the Taconic orogeny (Merguerian and Sanders, a).

The rocks File Size: 1MB. met~morphic core complex of Washington. The Omak Lake quadrangle contains rocks of the southwestern part of the Okanogan metamorphiC core complex; these rocks are continuous, both lithologically and in meta­ morphic grade, with high-grade crystalline rocks of the Shuswap Metamorphic Complex in southern British Columbia (Okulitch, ).

Shuswap metamorphic complex during the orogenic collapse of the SE Canadian Cordillera when convergence at the western margin of North America switched from transpression to transtension. This study documents the petrology, structure, and age of the Okanag an gneiss.

Continental margin, the submarine edge of the continental crust distinguished by relatively light and isostatically high-floating material in comparison with the adjacent oceanic crust.

It is the name for the collective area that encompasses the continental shelf, continental slope, and continental rise. Bedrock strata are part of a metamorphic core complex (Shuswap Com- plex) recording Mesozoic terrain accretion along the western margin of North America (Okulitch, ).

Subsequently, the area experienced substan- tial uplift, extension, and denudation during regional Cretaceous to Paleocene compression (Brown and Journeay, ).Cited by: Alex Strekeisen - I vetrini della mia fantasia.

Sassi Neri Skarn (Pargasite-Skarn) Skarn is an old Swedish mining term originally used to describe a type of silicate gangue, or waste rock, associated with iron-ore bearing sulfide deposits apparently replacing Palaeoproterozoic age.

that part of the cranton that is mantles by relatively underformed sed. rocks and underlain by a basement complex of ig and meta rocks. continental margin. that portin of the seafloor adjacent to major landmasses. continental shelf.

the gently sloping submerged portion of the continental margin extending from the shoreline to the continental slope. Geology adjacent to the western margin of the Shuswap metamorphic complex between 50 °30Ń and 51 °30′N (parts of 82L,M).

Geologic belts of Western Canada. The geology of British Columbia is a function of its location on the leading edge of the North American continent. The mountainous physiography and the diversity of rock types and ages hint at the complex geology, which is still undergoing revision despite a century of exploration and mapping.

metamorphism in the eastern portion of the GFC and adjacent low-grade Quesnel Terrane rocks, and thereby provide an estimate of the magnitude of displacement across the Kettle River fault. It complements the study of Laberge and Pattison () on the Granby fault, which bounds the western side of the complex.

@article{osti_, title = {Mesozoic tectonics and paleogeography of the western U. and the adjacent Pacific basin}, author = {Dilek, Y.}, abstractNote = {Recent geological, geochemical, and geochronological information from Jurassic and older ophiolite complexes and arc rocks in northern California provides new interpretations for Mesozoic tectonics of the western US and the adjacent.

is one of the world's leading portals to geology and earth science news and information for rocks, minerals, gemstones, energy, volcanoes, earthquakes, careers, geologic hazards, and more. This section provides an overview of Victoria's geological history from the Neoproterozoic to the present.

This reflects its source: the Tasman Fold Belt System in Victoria by VandenBerg et al. (), a Geological Survey of Victoria Special Publication that deals with the geology of the Tasman Fold Belt, whose history ceases in the mid-Carboniferous in Victoria.

This block lies within the Vernon Mining District in the Park Ranges of the Monashee Mountains, and is on the western margin of the Shushwap Metamorphic Complex, a block of higher grade metamorphic rocks in the Canadian Cordillera.

The block is underlain predominately by quartz biotite gneisses, quartz biotite graphite gneiss. All three major rocks types can be found in North Carolina: igneous, metamorphic and sedimentary. Together these major rock types tell a long, complex and sometimes violent geologic history. To help convey this long geologic history, the state is best described in terms of geological terranes and major geologic elements.

Tectonic setting and variations with depth of some Cretaceous and Cenozoic structural and magmatic systems of the western United States / Warren Hamilton --Tectonic significance of high-pressure plutonic rocks in the Western Cordillera of North America / E-an Zen --Pb isotopic evidence for the formation of Proterozoic crust in the southwestern.

Facebook is showing information to help you better understand the purpose of a Page. See actions taken by the people who manage and post ers: 17K. igneous and metamorphic rocks, causing the Ouachita Mountains to trend northeast between San Antonio and Dallas and east-west between San Antonio and Del Rio.

Permian-Triassic-Middle Jurassic Periods For the next million years or so, the future South Central Texas area was part of aFile Size: 2MB. Okulitch, A.V. The role of the Shuswap Metamorphic Complex in cordilleran tectonism: A Review Canadian Journal of Earth Sciences 21 p Kleinsphen, K.L. Cretaceous sedimentation and tectonics, Tyaughton - Methow Basin, southwest British Columbia Canadian Journal of Earth Sciences 22 p.

Complex (geology) In geology, a complex is a unit of rocks composed of rocks of two or three of the following rock types: metamorphic, igneous or sedimentary.

Complexes are lithodemic units (rock units that are not layered or stratigraphically bound) usually of regional extent.Links to other USGS Bulletins: USGS Bulletins 1 - USGS Bulletins - USGS Bulletins - / PETROLOGIC CHARACTERIZATION OF PELITIC SCHISTS IN THE WESTERN METAMORPHIC BELT, COAST PLUTONIC - METAMORPHIC COMPLEX, NEAR JUNEAU, SOUTHEASTERN ALASKA,pb, 18 pages, 4 figs., 9 tables, $ 5.

Geology and Petrogenesis of Mafic and Ultramafic Rocks of the Willets-Addie Area, Central Blue Ridge, NC, in R. D. Hatcher Jr. & A. J. Merschat (Eds.), Blue Ridge Geology Geotraverse East of the Great Smoky Mountains National Park, Western Cited by: 4.