1 edition of Metasomatism in the Kamiskotia Mafic Complex found in the catalog.
Metasomatism in the Kamiskotia Mafic Complex
|LC Classifications||QE 191 W847 1971 thesis|
|The Physical Object|
|Number of Pages||50|
The relative depletion of high field strength elements (HFSE), such as Nb, Ta and Ti, on normalised trace-element plots is a geochemical proxy routinely used to fingerprint magmatic processes linked to Phanerozoic subduction. This proxy has increasingly been applied to ultramafic-mafic units in Archaean cratons, but as these assemblages have commonly been affected by high-grade metamorphism. Book Chapter. Authors: Finamore, S U-Pb geochronology and detailed field mapping has resulted in a new subdivision of the Kamiskotia Volcanic Complex into Lower and Upper Kamiskotia strata with a m.y. volcanic hiatus between the two. This high-level mafic dike and sill complex was previously correlated with the upper zone of the.
The newly named Three Valley Suite (TVS) kersantite lamprophyre to shoshonitic mafic dykes of the Monashee Complex are inferred to be hypabyssal feeder dykes to an alkaline to calc-alkaline volcanic suite related to the Kamloops Group. in the Alvand plutonic complex, Hamadan, Iran Ali A. Sepahi and Lorence G. Collins April 5, Abstract Various types of intergrowth textures occur in the Alvand plutonic complex, Hamadan, Iran. Intergrowth textures, such as myrmekite, perthite, micrographic (± granophyric), and tourmaline-microcline intergrowth, are most common in this suite.
12/01/ (A Wilson) - Diamond drilling intersected a sequence of gabbro intruded by narrow units of mafic metavolcanic rocks. The occurrence also has exposures of iron formation in contact with the Kamiskotia Gabbro Complex. Buy Mafic-ultramafic Intrusions in Beishan and Eastern Tianshan at Southern CAOB: Petrogenesis, Mineralization and Tectonic Implication (Springer Theses) on .
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Volcanic rocks metasomatism refers to the replacement of various porphyries and crystals replacement with albite, amphibole, siderite, quartz, carbonate, gypsum, kaolin and chlorite, etc.
(Fig. A and B). It occurs from the hydrothermal stage to the burial stage. The metasomatism effect on primary pores is related to the action type. Book Chapter. Authors: Hathway, Ben east-facing stratigraphic interval in the upper part of the Kamiskotia Volcanic Complex.
New U-Pb ages for this interval, ranging from + or to + or Ma, and an age of + or Ma from the lower part of the Kamiskotia Volcanic Complex, indicate that the complex is likely part of Cited by: 9.
Get this from a library. Metasomatism in oceanic and continental lithospheric mantle. [M Coltorti; M Grégoire; Geological Society of London.;] -- Twenty years have passed since Menzies & Hawkesworth extended the concept of metasomatism to mantle processes.
The aim of this book is to gather together progress made on this topic since then. Most. Preliminary trace-element data suggest that the four mafic types could all have formed from the same parent through extraction of varying amounts of liquid.
Phonolites are strongly fractionated and peralkaline, and probably formed from olivine nephelinite magma, and possibly from the other mafic types, by removal of kaersutitic amphibole.
Metasomatism in oceanic and continental lithospheric mantle: introduction / Coltorti, M. & Grégoire, M. & Villaseca, C. --Types of metasomatism in mantle xenoliths enclosed in Neogene-Quaternary alkaline mafic lavas from Catalonia (NE Spain B.A.
--Plume-related stable isotope compositions and fluid-rock interaction processes in the. In our case, fluid release would happen ~km deeper than the estimated conditions for metasomatism and carbonation in the study unit (Fig.
a,b). Zhang RY, Liou JG, Cong BL () Talc- magnestite-and Ti-clinohumite-bearing ultra-high-pressure meta-mafic and ultramafic complex in the Dabie Mountains, China.
In the context of mantle metasomatism, enriched refers to the addition of trace elements such as Sr, Ba, Zr, and rare-earth elements (REE) which can be highly mobile in the mantle rock-fluid systems.
Mantle rocks that are depleted (as defined by major element compositions), can also be enriched if they have undergone cryptic metasomatism. The basement rocks in the area (Fig. 1b) consist of Shadli metavolcanics, mafic-ultramafic intrusions and syn- to post-tectonic granites (Masoud et al., ).
The metavolcanics are calc-alkaline basic to acidic rocks. They were intruded by mafic-ultramafic bodies (Fig. 2a). The mafic-ultramafic intrusions have relatively rounded shape and are.
Metasomatism (from the Greek μετά (change) and σῶμα (body)) is the chemical alteration of a rock by hydrothermal and other fluids. It is the replacement of one rock by another of different mineralogical and chemical composition.
The minerals which compose the rocks are dissolved and new mineral formations are deposited in their place.
However, mineral compositions show little evolution throughout the belt. Whole-rock major and trace element data indicate that fractionation played a minor role in the transition from mafic to syenitic intrusions.
Separate mantle sources and potassic metasomatism are important factors in the development of the Arkansas alkalic province.
Major and trace elements indicate a complex mutual interaction between gabbroic and ultramafic rocks during metasomatism, which together with microstructures suggest localized circulation of oxidizing, Si‐Al‐Ca‐rich fluids and mass transfer in high strain deformation zones.
The widespread mafic-ultramafic complexes in the Earth are well-known as their hosting Ni-Cu-PGE ore deposits, and their petrogenesis and mineralization have become hot issues in the geological studies.
This thesis comprehensively investigated the petrology, mineralogy, geochemistry and. The concept of metasomatism and its role in the geochemical enrichment and depletion processes in upper mantle rocks remains contentious. This volume makes a comprehensive contribution to the study of metasomatic and enrichment processes: origin and importance in determining trace element and isotopic heterogeneity in the lithospheric mantle.
Intrusion: Kamiskotia Gabbroic Complex. Geology Comments. 07/28/ (P Bousquet) - OFR Excerpt: The Kamiskotia Gabbroic Complex spans the northeastern Carscallen, northern Whitesides, eastern and central Massey, northeastern Enid, central Côté, southern Robb, western and northern Turnbull, and western Godfrey townships (Barrie ).
The Kam-Kotia volcanic-associated massive sulfide (VMS) deposit ( million tons, % Cu, % Zn, oz/ton Ag) is the largest of four deposits in the Late Archean Kamiskotia district. They occur within a restricted, east-facing stratigraphic interval in the upper part of the Kamiskotia Volcanic Complex, dated at from ± to ± Ma, while the lower part of the Kamiskotia Volcanic Complex has returned an age of ± Ma from, indicating that the complex is likely part of the Blake River assemblage.
Other articles where Metasomatic metamorphism is discussed: metamorphism: to decreasing temperature and pressure; metasomatism, the metamorphism that includes the addition or subtraction of components from the original assemblage; poly-metamorphism, the effect of more than one metamorphic event; and hydrothermal metamorphism, the changes that occur in the presence of water at high.
KENJI SHIMIZU, EIZO NAKAMURA, SHIGENORI MARUYAMA, The Geochemistry of Ultramafic to Mafic Volcanics from the Belingwe Greenstone Belt, Zimbabwe: Magmatism in an Archean Continental Large Igneous Province, Journal of Petrology, /petrology/egi, 46, 11, (), ().
The relation of metasomatism to ore deposits is discussed, and the new concept of formation of ore-concentrating dense salt melts and related light metasomatic fluids is proposed. The significant part of the monograph contains the characteristics of the main metasomatic families and rocks.
The area of relatively strong metasomatism is about km2 in extent, and rocks in the most strongly metasomatized areas contain up to 13 wt.% K2O. This area of metasomatism has been interpreted by Chapin and Lindley and others to be the results of the presence of alkaline-saline brines a hydrographically-closed basin.Metasomatism definition, the series of metamorphic processes whereby chemical changes occur in minerals or rocks as a result of the introduction of material, often in hot aqueous solutions, from external sources.
See more.The agencies of metasomatism are in nearly all cases aqueous solutions; probably they were often at a high temperature, as metasomatic changes are especially liable to occur in the vicinity of igneous intrusions (laccolites, dikes and necks) where large quantities of water were given off by the volcanic magma at a time when it had solidified.