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  • "Diagenesis of Upper Cambrian Mount Simon .

    Ion-microprobe oxygen isotope analyses of authigenic K-feldspar and quartz reveal a south ... Illinois basin during diagenesis of the Upper Cambrian Mount Simon ...

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  • A Study of Authigenic Feldspars: The Journal of .

    R.H. Vernon. (1986) K-feldspar megacrysts in granites — Phenocrysts, not porphyroblasts. Earth-Science Reviews 23:1, 1-63. Till Heinrichs. (1984) The Umsoli chert ...

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  • Publications | Kastner, Miriam

    Small amounts of authigenic K-feldspar were identified in one of the porcelanite beds. (Auth.) 1973. Ryan, WBF, Hsue KJ, Cita , ... Recent Publications.

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  • Authigenic feldspar as an indicator of paleo-rock/water ...

    Dolostones interbedded with Upper Permian evaporites at the base of the Northern Calcareous Alps contain abundant authigenic K-feldspar. Two petrographically ...

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  • Direct dating of authigenic K-feldspar overgrowths from ...

    K-feldspars form important detrital and authigenic components in sediments but may be difficult to separate by conventional means for isotope analysis, particularly ...

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  • Sed Rec Exam 1-50 Flashcards | Quizlet

    k-feldspar (microcline, orthoclase), plagioclase. lability. ... can be authigenic, granite, gneiss, less stable because they undergo hydrolysis. K spar vs Na, Ca spar.

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  • Diagenesis influencing the porosity of Upper Jurassic ...

    Authigenic K-feldspar grew on detrital K-feldspar, perthite and albite grains and possibly Ca-rich plagioclase. The potassium for the K-feldspar overgrowths probably

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  • Naturally weathered feldspar surfaces in the Navajo ...

    Naturally weathered feldspar surfaces in the Jurassic Navajo Sandstone at Black Mesa, ... Authigenic K-feldspar overgrowth and etch pits were also found on feldspar ...

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  • University of Minnesota's Mineral Pages: Plagioclase Feldspar

    All of the feldspar minerals exhibit a blocky crystal habit, hardness greater than glass, and two directions of cleavage that meet at nearly right angles.

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  • Literature & References - Plagioclase Feldspar

    Introduction J. Barry Maynard designed an experiment correlating to Plagioclase Feldspars; more specifically, he used the Plagioclase Feldspar compositions of early ...

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  • Authigenic K-feldspar in the Precambrian basement .

    Authigenic K-feldspar in the Precambrian basement of Ohio and its effect on tectonic discrimination of the granitic rocks EDWARD G. LIDIAK AND VINCENT M. CECI'

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  • K–Ca ages of authigenic sediments: examples from .

    K–Ca ages of authigenic sediments: examples from Paleozoic glauconite and applications to low-temperature thermochronometry ... K–Ar ages of authigenic feldspar

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  • RI0264D. Petrography and Diagenesis of a Half-Billion .

    Goethite, in the form of spheroids and starbursts, resting on authigenic K-feldspar and clay 36. Cauliflowerlike masses of goethite resting on quartz overgrowths

    feldspar_overgrowths_photos

    The thin section photos from the Brent sandstone, Statfjord field, offshore Norway, show a K-feldspar grain ... authigenic albite feldspar growing in the

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  • 24. STUDIES OF DIAGENESIS AND LITHIFICATION .

    Pliocene, eastern basin, Mediterranean Sea; ... Quartz, K-feldspar, pyrite. Authigenic Silicates Albite Albite per cent of the total carbonate. Only a few medium-

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  • Temperature–composition–time (T–X–t) data from authigenic ...

    authigenic K-feldspar exposed to temperatures in excess Detailed maps showing the distribution of fluid of Tc post-growth, in agreement with Lee ...

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  • References and Notes - JSTOR

    ... 99A00300 Reports Authigenic Potassium Feldspar in ... of authigenic K-feldspar in the ... of authigenic potassium feldspar in Cambrian and ...

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  • K Feldspar Authigenic

    AUTHIGENIC FELDSPARS IN CARBONATE ROCKS Mrnrarvr Read more about authigenic, feldspars, albite, detrital, microcline and carbonate.

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  • Feldspar - Sandatlas

    Density of feldspar is 2.56 (K-feldspar) ... Adularia is a K-feldspar produced by low-temperature hydrothermal (veins) or authigenic processes.

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  • Authigenic minerals - definition - English

    In the depth range of 150-230 m and at temperatures of 126-148° C the main authigenic minerals are quartz, calcite, K ... of authigenic carbonates and feldspar. ...

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  • ABSTRACT: Authigenic Illite in the Sandstone Reservoirs .

    Authigenic Illite in the Sandstone Reservoirs of Taiyuan Formation ... The growth of authigenic K-feldspar, ... of potassium for illite formation at the expense of ...

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  • AUTHIGENIC FELDSPARS IN CARBONATE ROCKS Mrnrarvr .

    AUTHIGENIC FELDSPARS IN CARBONATE ROCKS Mrnrarvr Read more about authigenic, feldspars, albite, detrital, microcline and carbonate.

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  • AAPG Datapages/Archives: Authigenic K-feldspar in .

    Journal of Sedimentary Petrology Vol. 52 (1982) No. 1. (March), Pages 187-197. Authigenic K-feldspar in the Bromsgrove Sandstone Formation (Triassic) of .

    Authigenic K-feldspar in British Permo-Triassic sandstones ...

    Authigenic K-feldspar, occurring as overgrowths around detrital orthoclase and microcline, is a common minor diagenetic constituent in British Permo-Triassic sandstones.

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  • British Library EThOS: Txt data from authigenic K-feldspar ...

    Although not intended as a definitive study of Ar-diffusion within authigenic K-feldspar, this research does provide a valuable data set from which discussion can begin.

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  • Created Date: 9/14/2007 10:28:03 AM

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  • Dating of Multistage Fluid Flow in Sandstones - Science

    The data show that K-feldspar precipitation began in the Victory reservoir ∼83 Ma as a result of infiltration of hot aqueous fluid (125°C ...

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  • Structural state of K-feldspar in the younger granites of ...

    Free Online Library: Structural state of K-feldspar in the younger granites of the western St. Francois Mountains, southeastern Missouri: further evidence for ...

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  • Temperature-composition-time (TXt) data from authigenic K ...

    Temperature-composition-time (TXt) data from authigenic K-feldspar: an integrated methodology for dating fluid flow events

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  • 40 39Ar thermochronometry of K-feldspar from .

    40Ar=39Ar thermochronometry of K-feldspar from the KTB borehole, ... order to determine if the feldspar was primary or authigenic. Igneous K-feldspars emit a .

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  • Regional fluid migration in the Illinois basin ... - Geology

    Oxygen isotope compositions of widespread, authigenic K-feldspar and quartz overgrowths and cements in the Upper Cambrian Mount Simon Sandstone were measured by ion ...

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  • Nature and origin of authigenic K-feldspar in .

    Abstract. Authigenic K-feldspar occurs in alteration profiles in uppermost Precambrian igneous and metamorphic basement rocks of the midcontinent.

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