Diagenetic chloritization of feldspars in sandstones

S. Morad; A. A. Aldahan

doi:10.1016/0037-0738(87)90046-7

Diagenetic chloritization of feldspars in sandstones

S. Morad, A. A. Aldahan

Earth Science

Uppsala University

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

Detrital microcline and albite are commonly replaced diagenetically by chlorite in sandstones of the Visingsö Group (Upper Proterozoic, southern Sweden). Authigenic quartz and, in some cases, albite and illite are associated with the chlorite. The SEM examinations suggest that chloritization of feldspar has usually been preceded by dissolution of the replaced feldspar grain. Fe ²⁺ and Mg²⁺, which are needed for the chloritization, have partly been derived from the detrital Fe-Mg silicates (mainly biotite) Fe-oxide pigment and Fe-Ti oxide grains, whereas Si⁴⁺ and Al³⁺ are supplied mostly by the altered feldspars. The K⁺ released from microcline and Na^- from albite were mostly incorporated in authigenic illite and albite, respectively.

Original language	British English
Pages (from-to)	155-164
Number of pages	10
Journal	Sedimentary Geology
Volume	51
Issue number	3-4
DOIs	https://doi.org/10.1016/0037-0738(87)90046-7
State	Published - Feb 1987

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@article{b9f159e9075945dd8c3379d134cf176a,

title = "Diagenetic chloritization of feldspars in sandstones",

abstract = "Detrital microcline and albite are commonly replaced diagenetically by chlorite in sandstones of the Visings{\"o} Group (Upper Proterozoic, southern Sweden). Authigenic quartz and, in some cases, albite and illite are associated with the chlorite. The SEM examinations suggest that chloritization of feldspar has usually been preceded by dissolution of the replaced feldspar grain. Fe 2+ and Mg2+, which are needed for the chloritization, have partly been derived from the detrital Fe-Mg silicates (mainly biotite) Fe-oxide pigment and Fe-Ti oxide grains, whereas Si4+ and Al3+ are supplied mostly by the altered feldspars. The K+ released from microcline and Na- from albite were mostly incorporated in authigenic illite and albite, respectively.",

author = "S. Morad and Aldahan, {A. A.}",

note = "Funding Information: The SEM examinations were carried out in the SEM laboratories at the Agricultural University of Norway under the direction of Mr. T. Krekling. The senior author wishes to thank the Swedish Natural Science Research Council (NFR) for financial support. The microprobe analyses were performed at the Geological Museum in Oslo. Kersti GMersen kindly typed the manuscript.",

year = "1987",

month = feb,

doi = "10.1016/0037-0738(87)90046-7",

language = "British English",

volume = "51",

pages = "155--164",

journal = "Sedimentary Geology",

issn = "0037-0738",

publisher = "Elsevier",

number = "3-4",

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TY - JOUR

T1 - Diagenetic chloritization of feldspars in sandstones

AU - Morad, S.

AU - Aldahan, A. A.

N1 - Funding Information: The SEM examinations were carried out in the SEM laboratories at the Agricultural University of Norway under the direction of Mr. T. Krekling. The senior author wishes to thank the Swedish Natural Science Research Council (NFR) for financial support. The microprobe analyses were performed at the Geological Museum in Oslo. Kersti GMersen kindly typed the manuscript.

PY - 1987/2

Y1 - 1987/2

N2 - Detrital microcline and albite are commonly replaced diagenetically by chlorite in sandstones of the Visingsö Group (Upper Proterozoic, southern Sweden). Authigenic quartz and, in some cases, albite and illite are associated with the chlorite. The SEM examinations suggest that chloritization of feldspar has usually been preceded by dissolution of the replaced feldspar grain. Fe 2+ and Mg2+, which are needed for the chloritization, have partly been derived from the detrital Fe-Mg silicates (mainly biotite) Fe-oxide pigment and Fe-Ti oxide grains, whereas Si4+ and Al3+ are supplied mostly by the altered feldspars. The K+ released from microcline and Na- from albite were mostly incorporated in authigenic illite and albite, respectively.

AB - Detrital microcline and albite are commonly replaced diagenetically by chlorite in sandstones of the Visingsö Group (Upper Proterozoic, southern Sweden). Authigenic quartz and, in some cases, albite and illite are associated with the chlorite. The SEM examinations suggest that chloritization of feldspar has usually been preceded by dissolution of the replaced feldspar grain. Fe 2+ and Mg2+, which are needed for the chloritization, have partly been derived from the detrital Fe-Mg silicates (mainly biotite) Fe-oxide pigment and Fe-Ti oxide grains, whereas Si4+ and Al3+ are supplied mostly by the altered feldspars. The K+ released from microcline and Na- from albite were mostly incorporated in authigenic illite and albite, respectively.

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U2 - 10.1016/0037-0738(87)90046-7

DO - 10.1016/0037-0738(87)90046-7

M3 - Article

AN - SCOPUS:0023159639

SN - 0037-0738

VL - 51

SP - 155

EP - 164

JO - Sedimentary Geology

JF - Sedimentary Geology

IS - 3-4

ER -

Diagenetic chloritization of feldspars in sandstones

Abstract

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