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Titolo:
FELDSPAR ALBITIZATION AND FELDSPAR CEMENTATION IN THE ALBERT FORMATION RESERVOIR SANDSTONES, NEW-BRUNSWICK, CANADA
Autore:
CHOWDHURY AH; NOBLE JPA;
Indirizzi:
UNIV NEW BRUNSWICK,DEPT GEOL FREDERICTON E3B 5A3 NB CANADA
Titolo Testata:
Marine and petroleum geology
fascicolo: 4, volume: 10, anno: 1993,
pagine: 394 - 402
SICI:
0264-8172(1993)10:4<394:FAAFCI>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
OLIGOCENE FRIO FORMATION; DIAGENETIC ALBITIZATION; GULF-COAST; MONCTON SUBBASIN; OFFSHORE NORWAY; SOUTH TEXAS; K-FELDSPAR; TERTIARY; ROCKS; GEOCHEMISTRY;
Keywords:
FLUVIOLACUSTRINE SANDSTONES; DIAGENESIS; FELDSPAR ALBITIZATION; FELDSPAR CEMENTS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
41
Recensione:
Indirizzi per estratti:
Citazione:
A.H. Chowdhury e J.P.A. Noble, "FELDSPAR ALBITIZATION AND FELDSPAR CEMENTATION IN THE ALBERT FORMATION RESERVOIR SANDSTONES, NEW-BRUNSWICK, CANADA", Marine and petroleum geology, 10(4), 1993, pp. 394-402

Abstract

Feldspar albitization and feldspar cementation (especially albite) are common in the Carboniferous fluvio-lacustrine Albert Formation reservoir sandstones of the Moncton subbasin, New Brunswick. Both albitization and albite cements occur in early and late diagenesis. Burial diagenetic origin of albite is supported by: (1) the chemical purity of albite; (2) the growth of euhedral albite on numerous sites of the host feldspar; (3) the continued growth of the replacement albite into adjacent pores; (4) the delicate skeletal texture in partially dissolved areas of albitized feldspar; and (5) the occurrence of ankerite cement inclusions in authigenic albite. Backscattered electron imaging suggests that feldspar albitization occurs in irregular, vein-like and perthite albite forms. Feldspar albitization is commonly associated with dissolution pores and twins. Backscattered electron imaging suggests that up to 50% of the mean total 4% detrital K-feldspars have been albitized. The volume percentage of feldspar albitization shows no trend with increasing burial depth or temperature. Most of the sandstones have 2-3% albite cement except in a high minus-cement porosity framework where it may exceed 30% of the sandstone.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/12/20 alle ore 10:36:38