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Wednesday, May 6, 2020 | History

3 edition of Petrology of dikes emplaced in the ultramafic rocks of southeastern Quebec. found in the catalog.

Petrology of dikes emplaced in the ultramafic rocks of southeastern Quebec.

Aniruddha De

Petrology of dikes emplaced in the ultramafic rocks of southeastern Quebec.

by Aniruddha De

  • 22 Want to read
  • 5 Currently reading

Published by University Microfilms in Ann Arbor .
Written in English

    Subjects:
  • Dikes (Geology),
  • Petrology -- Quebec (Province)

  • The Physical Object
    Paginationx, 201, vi leaves.
    Number of Pages201
    ID Numbers
    Open LibraryOL19070020M

    The Ashuanipi Subprovince is located at the eastern end of the Superior y circular, it covers an area of >90 km 2 and is mostly located in Quebec and extends eastward into Labrador. The Ashuanipi Subprovince is bordered to the east by Paleoproterozoic rocks of the Labrador Trough (Southeastern Churchill Province) and to the southeast by the Grenville Province. Ultramafic rocks comprised of forty to one hundred percent percent olivine. Contain variable but greater than 10% of both ortho- and clino-pyroxene, and accessory phases. Common in the mantle. Represents "Fertile" mantle that has not undergone a melt extraction event.

    A large igneous province (LIP) is an extremely large accumulation of igneous rocks, including intrusive (sills, dikes) and extrusive (lava flows, tephra deposits), arising when magma travels through the crust towards the surface. The formation of LIPs is variously attributed to mantle plumes or to processes associated with divergent plate tectonics. The formation of some of the LIPs the past. The Circum-Superior Belt is a widespread Paleoproterozoic large igneous province in the Canadian Shield of Northern, Western and Eastern extends more than 3, km (2, mi) from northeastern Manitoba through northwestern Ontario, southern Nunavut to northern s rocks of the Circum-Superior Belt are mafic-ultramafic in composition, deposited in the Labrador Age: Paleoproterozoic.

    Ultramafic Rock. An igneous rock with a very low silica content and rich in minerals such as hypersthene, augite, and rocks are also known as ultrabasic rocks. Examples include: peridotite, kimberlite, lamprophyre, lamproite, dunite, and .   The intrusion was emplaced at ± 7 Ma 4 into Palaeoproterozoic dyke and sometimes contacts between ultramafic rocks and less mafic rocks. of the country rocks. If carbonatite dykes are Cited by:


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Petrology of dikes emplaced in the ultramafic rocks of southeastern Quebec by Aniruddha De Download PDF EPUB FB2

The ultramafic rocks of the Appalachian region in the Eastern Townships of Quebec consist mainly of serpentinized harzburgite and dunite. They are intruded by dikes of dioritic rocks, quartz monzonites (adamellites), pegmatite, and albitite. The oldest rocks on Duke Island are clastic sedimentary and volcanic rocks of probable Late Triassic or Jurassic age.

These are metamorphosed to greenschist- and amphibolite-facies grades and intruded by gabbroic and granitic rocks. The ultramafic rocks underlie two main areas totalling 9 sq. mi., and about a dozen minor areas.

The hybrid ultramafic rocks and gabbroids are the product of interaction between mafic melts and restitic ultramafic rocks. Taking into account the later formation of the gabbroid intrusions compared to the ultramafic protrusions, the massifs in question are determined as polygenic.

In the Lac à la Vase intrusion, the contact relations between the inner and outer zones (e.g., mafic and ultramafic rocks from the inner zones locally contain, enclaves of mafic rocks from the outer zone, and inversely) indicate that the two zones were probably formed at about the same time.

In addition, our field work showed that, in the Lac Nadeau East intrusion, the eastern inner zone and the outer zone were Cited by: 9. The results indicate that more than 99% of the mafic dykes were emplaced in the Eastern Tianshan and Beishan, Western Mongolian-Altai, Eastern Junggar, North and West bank of Balkhash, Western Junggar, and Chingis-Taerbahatai.

Wilson AH () The geology of the Great ‘Dyke’, Zimbabwe: the ultramafic rocks. J Petrol 23(2)– Author: Qianwen Feng, Jinyi Li, Jianfeng Liu, Kefa Zhou. The Vila Bela Granite has monzonitic composition, and is formed perdominantly by NE pegmatitic dykes, following the main fractures of the mafic-ultramafic rocks.

The sediments of Aguapeí. The Monteregian Hills igneous province is located in southwestern Quebec, Canada, and consists of a number of smalI plutons and dikes encompassing a wide range of alkaline rock : Nelson Eby. The Early Paleoproterozoic Burakovsky complex contains Europe’s largest layered mafic-ultramafic pluton and giant Avdeevo gabbronorite dike.

The pluton consists of two independent bodies of different age (the Aganozero and Shalozero-Burakovsky bodies), each having its own internal structure and contacting each other in their apical by: 5.

Mafic–ultramafic and minor felsic volcanic and intrusive rocks with associated metamorphosed sedimentary rocks form the late Archean Wahamen greenstone belt, roughly 30 km south of the bodies. This supracrustal sequence was metamorphosed at a lower grade (i.e. upper greenschist facies) than nearby basement by: These rocks which constitute the Lamprey Falls Formation have been intruded by hypabyssal metagabbro, the ultramafic­ gabbroic chromite-bearingBird River Sill (Trueman and Macek ), metagabbro stocks, quartz and quartz-feldsparporphyry dykes, and in the southern and eastern map area (Figure 2) by pegmatitic granite and pegmatite stocks and File Size: 1MB.

The non-slice ultramafics are observed within the mantle slices. Petrological and geochemical studies of the Neoproterozoic ultramafic rocks from wadi Alam in the South Eastern Desert of Egypt provided new evidences for possibility of two Neoproterozoic mantle reservoirs. The serpentinized ultramafic mantle slices have harzburgite : Hamed Gamal El Dien, Mohamed Hamdy, Abdel Salam Abu El-Ela, Adel Hassan.

A combination of field, petrographic, geochemical, and geochronological work on the layered mafic–ultramafic rocks in the Bushveld Complex of South Africa (Mitchell & Scoon, ; Mungall et al., ; Hayes et al., ; Scoon & Costin, ) and in the Rum intrusion of Scotland (Bédard et al., ; Hepworth et al.,) strongly Cited by: 2.

ULTRAMAFIC ROCKS IN BRITISH COLUMBIA: DELINEATING TARGETS FOR MINERAL SEQUESTRATION OF CO 2 By D. Voormeij1 and G. Simandl1, 2 KEYWORDS: CO 2 sequestration, ultramafic, mineral potential, serpentinite, dunite. SUMMARY British Columbia has favourable geology and excellent exploration potential to host the raw materials suitable for CO.

Clowes, Ronald Wyman, Derek and Kerrich, Robert Mantle plume – volcanic arc interaction: consequences for magmatism, metallogeny, and cratonization in the Abitibi and Wawa subprovinces, CanadaThis article is one of a series of papers published in this Special Issue on the theme Lithoprobe — parameters, processes, and the evolution of a by:   Mafic Magma Intraplating: Anatexis and Hybridization in Arc Crust, Bindal Batholith, Norway ultramafic rocks and non-migmatitic metasedimentary rocks (Fig.

2a). Dioritic dikes emplaced into the partly molten contact diatexites and related leucosomes hybridized with them to form ‘contact granite’ by: Read Chapter of Igneous and Metamorphic Petrology by John Winter or Chapter 18 of Igneous and Metamorphic Petrology by Philpotts The three-component system CMS (Ca-Mg-Si): Ultramafic Rocks The upper mantle is composed of ultramafic rocks (peridotites), different proportions of olivine (forsterite to fayalite) + orthopyroxene (enstatite to ferrosilite) + clinopyroxene (diopside to.

IGNEOUS AND METAMORPHIC PETROLOGY OF ULTRAMAFICS. The hard rocks recovered at Site are heavily serpentinized and tectonized harzburgite and dunite clasts. Of the ultramafic rocks, 98% are harzburgites and 2% are dunites.

The maximum recovered thickness of a single clast is ~1 m. De, A. () Petrology of dikes emplaced in ultramafic rocks of southeastern Quebec and origin of the rodingite. Geological Society of Americe Memoir De, A. () Petrology of dikes emplaced in ultramafic rocks of southeastern Quebec and origin of the rodingite.

Geological Society of Americe MemoirData. sedimentary rocks with rare interbedded basalt and mafic dikes. Hopson (quoted in Mattinson,p. ) suggested that the Swakane was originally silicic volcanic rocks.

This uncertainty of origin makes interpretation of its protolith age difficult. By isotopic analyses of lead and uranium, at least some zircon from the Swakane justFile Size: KB.

metamorphic rocks comprise about 3% of the dike, while dense ultramafic mantle-derived fragments of eclogite, lherzolite, and websterite are rare. Outcrops of SUM constitute about 1% of the dike and are found primarily as small dikes and sills in the wall rocks and large breccia blocks in the dike.

SUM is also found as small.GEOLOGY OF SELECTED MAFIC AND ULTRAMAFIC ROCKS OF GEORGIA: A REVIEW Compiled by Harold R. Vincent Keith I. McConnell Philip C. Perley INTRODUCfiON Mafic and ultramafic rocks which have been metamor­ phosed to various degrees, are relatively common throughout the Appalachian Blue Ridge and Piedmont provinces (Figure 1).Igneous rocks are those that form via the process of melting and cooling.

If they erupt from volcanoes onto the surface as lava, they are called extrusive contrast, Intrusive rocks are formed from magma that cools underground. If the intrusive rock cooled underground but near the surface, it is called subvolcanic or hypabyssal, and often has visible, but tiny mineral : Andrew Alden.