K Feldspar Authigenic

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AUTHIGENIC KAOLINITE AND MICA AS EVIDENCE

authigenic kaolinite and mica as evidence for phase equilibria at low temperatures by r. w. rex* ... and k-feldspar at

Ramseyer K Boles JR Lichtner PC 1992 Authigenic KNH 4 ...

Ramseyer K Boles JR Lichtner PC 1992 Authigenic KNH 4 feldspar in sandstones a from KJBKKJB KJ 77 at EAFIT University

Near-Surface K-Feldspar Precipitation in ... - JSTOR

318 A. J. MARASCHIN ET AL. Figure 1. Location and major structural features of the Potiguar Basin (modified after Anjos et al. 2000) early authigenic K-feldspar ...

Potassium Feldspar - Wisconsin Geological & Natural ...

PIERCE COUNTY: K feldspar forms abundant authigenic overgrowths on detrital K feldspar grains in the Washington Road Sandstone within the Rock Elm disturbance ...

Feldspar - Sandatlas

Granite with white sodium-rich plagioclase albite, pink K-feldspar, black biotite, gray quartz. Width of view 21 cm. Composition. ... or authigenic processes.

Clay mineral diagenesis in sedimentary basins a key

Clay mineral diagenesis in sedimentary basins 17 FIG. 1. Leached feldspar and authigenic kaolinite from the Brent Group (Ness Formation, Huldra Field, depth,

Feldspars - Crystal chemistry, CL and provenance

Feldspars - Species, Crystal Chemistry, Textures, ... For K-feldspar ... the dark olive luminescence of authigenic albite in different carbonate rocks with ...

ArAr dating of authigenic K-feldspar: Quantitative ...

We have analysed two distinct generations of authigenic K-feldspar in Fucoid Bed sandstones from An-t-Sron and Skiag Bridge, NW Highlands, Scotland, which have ...

Nature and origin of authigenic K-feldspar in Precambrian ...

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

Significance of Authigenic K-feldspar in Cambrian ...

Strata containing abundant authigenic feldspar, which heretofore have been considered rarities in the geologic column, now appear to be characteristic of the Cambrian ...

FORMATION OF AUTHIGENIC ILLITE IN

The principal authigenic minerals in the sand- stones are kaolinite, ferroan calcite, siderite ... proportion of K feldspar semi-quantitatively deter-

Authigenic Illite in the Sandstone Reservoirs of

Authigenic Illite in the Sandstone Reservoirs of Taiyuan Formation, Northeast ... The growth of authigenic K-feldspar, ... of Taiyuan Formation, Northeast Ordos ...

Ar-Ar dating of authigenic K-feldspar: quantitative ...

ACCEPTED MANUSCRIPT A CCEPTED MANUSCRIPT - 3 - 55 The abundance of K-feldspar in igneous rocks and its occurrence as detrital and 56 authigenic

AUTHIGENIC FELDSPARS IN CARBONATE ROCKS Mrnrarvr

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

Authigenic K-NH4-Feldspar in Sandstones: A

AUTHIGENIC K-NH4-FELDSPAR IN SANDSTONES: A FINGERPRINT OF THE DIAGENESIS OF ORGANIC MATIER KARL RAMSEYER'. LARR YN W. DIAMOND'. AND JAMES R. BOLES' ' Geologisches lnstltut, L'mverslliil Bern, Ballzerstrasse 1, CH-3012 Bern, Switzerland

Authigenic K-NH4-Feldspar in Sandstones: A

authigenic k-nh4-feldspar in sandstones: a fingerprint of the diagenesis of organic matier karl ramseyer'. larr yn w. diamond'. and james r. boles'

Microtextures of authigenic Or-rich feldspar in the

Microtextures of authigenic Or-rich feldspar in the Upper Jurassic Humber Group, ... replacive authigenic K-feldspar within detrital grains may significantly ...

Authigenic Albite and Potassium Feldspar in the

Introduction Authigenic albite and K-feldspar have been iden-tified in oil shale and tuffs of the Eocene Green River Formation of Colorado and Wyoming.

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 ...

Regional Diagenetic Patterns in the St. Peter

St. Peter Sandstone: Implications for Brine Migration ... St. Peter Sandstone: Implications for Brine Migration in the ... of authigenic K-feldspar and illite in ...

Note: Porphyroblastic K-feldspar from low-grade

Note: Porphyroblastic K-feldspar from low-grade marbles of the Northern Zone of the Damara Orogen, ... Authigenic potassium feldspar in ribbon rocks of

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'

Authigemc Potassium Feldspar Cambrian

the aluminum-silicon ordering of the authigenic K-feldspar is relatively low, with (tlo + t1m) 0.75 (11). Authigenic K-feldsparis characteristi ...

Optical data on some authigenic feldspars from

Optical data on some authigenic feldspars from Western Australia ... (average 5o %), K-feldspar 9 ... The unusual features of the authigenic feldspar are ...

Authigenic K-feldspar in recent submarine gypsum ...

Authigenic K-feldspar is a minor constituent in Recent submarine gypsum concretions from Kattegat, Denmark, associated with authigenic quartz.

AUTHIGENIC FELDSPARS IN CARBONATE ROCKS

Mrnrarvr KasrNERl, Department of Geological Sciences, ... rocks in which authigenic K-feldspars occur are ... or quantity of authigenic feldspar in the rocks studied ...

Data Repository item 2003052 Authigenic K

Data Repository item 2003052 Authigenic K-Feldspar 40Ar/39Ar Analytical Data ID Watts Ca/K Cl/K 36Ar/39Ar 40*Ar/39Ar Mol 39Ar %39 In

Diagenesis of Upper Cambrian Mount Simon Sandstone

Ion-microprobe oxygen isotope analyses of authigenic K-feldspar ... Diagenesis of Upper Cambrian Mount Simon Sandstone in ... "Diagenesis of Upper Cambrian Mount ...

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, structurally, and isotopically distinct generations of K-feldspar can be distinguished: crystals composed of an inclusion-rich core and a ...

USGS Open-File Report 93-683 Clay Mineralogical

Clay Mineralogical Analyses of the Owens Lake ... of plagioclase and K-feldspar but from the periodic precipitation of K-feldspar and smectite in an authigenic ...

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 geochronology. UV lasers are being increasing applied to in situ analysis since they are strongly absorbed by clear minerals such as K ...

Feldspar Group: Feldspar Group mineral information

The intergrowths or exsolution lamellae of the albite are visible as white lines coursing through the K feldspar ... Petrography and composition of authigenic ...

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.