Diagenetic evolution and porosity destruction of turbiditic hybrid arenites and siliciclastic sandstones of foreland basins: Evidence from the Eocene Hecho Group, Pyrenees, Spain

H. Mansurbeg, M. A. Caja, R. Marfil, S. Morad, E. Remacha, D. Garcia, T. Martín-Crespo, M. A K El-Ghali, J. P. Nystuen

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

This study aims to unravel the impact of diagenetic alterations on porosity loss of foreland-basin turbiditic hybrid arenites and associated siliciclastic sandstones of the Eocene Hecho Group (south-central Pyrenees, Spain). In this succession, hybrid arenites and calclithites are extensively cemented by mesogenetic calcite cement (δ 180 VPDB = -10.0% 0 to -5.8% 0; T h, mode = 80° C; salinity mode = 18.8 wt% eq. NaCl), Fe-dolomite (δ 18O VPDB = -8.5% 0 to -6.3% 0) and trace amounts of siderite. The extent of carbonate cementation is interpreted to be related to the amounts of extrabasinal and intrabasinal carbonate grains, which provided nuclei and sources for the precipitation and growth of carbonate cements. Other diagenetic alterations, such as pyrite and albitization, had no impact on reservoir quality. Scarce early diagenetic cements, coupled with abundant ductile carbonate and siliciclastic framework grains, have led to rapid porosity loss owing to compaction. Conversely, abundant quartz in the sandstones prevented rapid loss of porosity by mechanical compaction. Reservoir quality was affected by mesogenetic cementation by quartz overgrowths, calcite and dolomite intergranular pressure dissolution of quartz grains, and formation of fracture-filling calcite cement (δ 18O VPDB values from - 10.4% 0 to -7.8% 0; T h temperatures of ≈ 150° C), which are attributed to deep circulation of hot meteoric waters during extensional stages of tectonism. The results of this study illustrate that diagenetic evolution pathways of the arenites and sandstones are closely linked to the variation in detrital composition, particularly the proportion and types of extrabasinal noncarbonates, extrabasinal carbonates, and intrabasinal carbonate grains. These insights suggest that marine turbiditic hybrid arenites and calclithites of foreland basins are subjected to more rapid and extensive porosity loss owing to compaction and cementation than associated siliciclastic sandstones. Degradation of reservoir quality makes these hybrid arenites, calclithites, and sandstones suitable as tight gas reservoirs, but only if fracture porosity and permeability develop during tectonic deformation.

Original languageEnglish
Pages (from-to)711-735
Number of pages25
JournalJournal of Sedimentary Research
Volume79
Issue number10
DOIs
Publication statusPublished - Sep 2009

Fingerprint

foreland basin
Eocene
porosity
sandstone
carbonate
cement
cementation
compaction
calcite
quartz
dolomite
albitization
siderite
meteoric water
pyrite
dissolution
permeability
salinity
tectonics
degradation

ASJC Scopus subject areas

  • Geology

Cite this

Diagenetic evolution and porosity destruction of turbiditic hybrid arenites and siliciclastic sandstones of foreland basins : Evidence from the Eocene Hecho Group, Pyrenees, Spain. / Mansurbeg, H.; Caja, M. A.; Marfil, R.; Morad, S.; Remacha, E.; Garcia, D.; Martín-Crespo, T.; El-Ghali, M. A K; Nystuen, J. P.

In: Journal of Sedimentary Research, Vol. 79, No. 10, 09.2009, p. 711-735.

Research output: Contribution to journalArticle

Mansurbeg, H. ; Caja, M. A. ; Marfil, R. ; Morad, S. ; Remacha, E. ; Garcia, D. ; Martín-Crespo, T. ; El-Ghali, M. A K ; Nystuen, J. P. / Diagenetic evolution and porosity destruction of turbiditic hybrid arenites and siliciclastic sandstones of foreland basins : Evidence from the Eocene Hecho Group, Pyrenees, Spain. In: Journal of Sedimentary Research. 2009 ; Vol. 79, No. 10. pp. 711-735.
@article{c4628c3aa20f45a8826310f2218d0300,
title = "Diagenetic evolution and porosity destruction of turbiditic hybrid arenites and siliciclastic sandstones of foreland basins: Evidence from the Eocene Hecho Group, Pyrenees, Spain",
abstract = "This study aims to unravel the impact of diagenetic alterations on porosity loss of foreland-basin turbiditic hybrid arenites and associated siliciclastic sandstones of the Eocene Hecho Group (south-central Pyrenees, Spain). In this succession, hybrid arenites and calclithites are extensively cemented by mesogenetic calcite cement (δ 180 VPDB = -10.0{\%} 0 to -5.8{\%} 0; T h, mode = 80° C; salinity mode = 18.8 wt{\%} eq. NaCl), Fe-dolomite (δ 18O VPDB = -8.5{\%} 0 to -6.3{\%} 0) and trace amounts of siderite. The extent of carbonate cementation is interpreted to be related to the amounts of extrabasinal and intrabasinal carbonate grains, which provided nuclei and sources for the precipitation and growth of carbonate cements. Other diagenetic alterations, such as pyrite and albitization, had no impact on reservoir quality. Scarce early diagenetic cements, coupled with abundant ductile carbonate and siliciclastic framework grains, have led to rapid porosity loss owing to compaction. Conversely, abundant quartz in the sandstones prevented rapid loss of porosity by mechanical compaction. Reservoir quality was affected by mesogenetic cementation by quartz overgrowths, calcite and dolomite intergranular pressure dissolution of quartz grains, and formation of fracture-filling calcite cement (δ 18O VPDB values from - 10.4{\%} 0 to -7.8{\%} 0; T h temperatures of ≈ 150° C), which are attributed to deep circulation of hot meteoric waters during extensional stages of tectonism. The results of this study illustrate that diagenetic evolution pathways of the arenites and sandstones are closely linked to the variation in detrital composition, particularly the proportion and types of extrabasinal noncarbonates, extrabasinal carbonates, and intrabasinal carbonate grains. These insights suggest that marine turbiditic hybrid arenites and calclithites of foreland basins are subjected to more rapid and extensive porosity loss owing to compaction and cementation than associated siliciclastic sandstones. Degradation of reservoir quality makes these hybrid arenites, calclithites, and sandstones suitable as tight gas reservoirs, but only if fracture porosity and permeability develop during tectonic deformation.",
author = "H. Mansurbeg and Caja, {M. A.} and R. Marfil and S. Morad and E. Remacha and D. Garcia and T. Mart{\'i}n-Crespo and El-Ghali, {M. A K} and Nystuen, {J. P.}",
year = "2009",
month = "9",
doi = "10.2110/jsr.2009.060",
language = "English",
volume = "79",
pages = "711--735",
journal = "Journal of Sedimentary Research",
issn = "1527-1404",
publisher = "SEPM Society for Sedimentary Geology",
number = "10",

}

TY - JOUR

T1 - Diagenetic evolution and porosity destruction of turbiditic hybrid arenites and siliciclastic sandstones of foreland basins

T2 - Evidence from the Eocene Hecho Group, Pyrenees, Spain

AU - Mansurbeg, H.

AU - Caja, M. A.

AU - Marfil, R.

AU - Morad, S.

AU - Remacha, E.

AU - Garcia, D.

AU - Martín-Crespo, T.

AU - El-Ghali, M. A K

AU - Nystuen, J. P.

PY - 2009/9

Y1 - 2009/9

N2 - This study aims to unravel the impact of diagenetic alterations on porosity loss of foreland-basin turbiditic hybrid arenites and associated siliciclastic sandstones of the Eocene Hecho Group (south-central Pyrenees, Spain). In this succession, hybrid arenites and calclithites are extensively cemented by mesogenetic calcite cement (δ 180 VPDB = -10.0% 0 to -5.8% 0; T h, mode = 80° C; salinity mode = 18.8 wt% eq. NaCl), Fe-dolomite (δ 18O VPDB = -8.5% 0 to -6.3% 0) and trace amounts of siderite. The extent of carbonate cementation is interpreted to be related to the amounts of extrabasinal and intrabasinal carbonate grains, which provided nuclei and sources for the precipitation and growth of carbonate cements. Other diagenetic alterations, such as pyrite and albitization, had no impact on reservoir quality. Scarce early diagenetic cements, coupled with abundant ductile carbonate and siliciclastic framework grains, have led to rapid porosity loss owing to compaction. Conversely, abundant quartz in the sandstones prevented rapid loss of porosity by mechanical compaction. Reservoir quality was affected by mesogenetic cementation by quartz overgrowths, calcite and dolomite intergranular pressure dissolution of quartz grains, and formation of fracture-filling calcite cement (δ 18O VPDB values from - 10.4% 0 to -7.8% 0; T h temperatures of ≈ 150° C), which are attributed to deep circulation of hot meteoric waters during extensional stages of tectonism. The results of this study illustrate that diagenetic evolution pathways of the arenites and sandstones are closely linked to the variation in detrital composition, particularly the proportion and types of extrabasinal noncarbonates, extrabasinal carbonates, and intrabasinal carbonate grains. These insights suggest that marine turbiditic hybrid arenites and calclithites of foreland basins are subjected to more rapid and extensive porosity loss owing to compaction and cementation than associated siliciclastic sandstones. Degradation of reservoir quality makes these hybrid arenites, calclithites, and sandstones suitable as tight gas reservoirs, but only if fracture porosity and permeability develop during tectonic deformation.

AB - This study aims to unravel the impact of diagenetic alterations on porosity loss of foreland-basin turbiditic hybrid arenites and associated siliciclastic sandstones of the Eocene Hecho Group (south-central Pyrenees, Spain). In this succession, hybrid arenites and calclithites are extensively cemented by mesogenetic calcite cement (δ 180 VPDB = -10.0% 0 to -5.8% 0; T h, mode = 80° C; salinity mode = 18.8 wt% eq. NaCl), Fe-dolomite (δ 18O VPDB = -8.5% 0 to -6.3% 0) and trace amounts of siderite. The extent of carbonate cementation is interpreted to be related to the amounts of extrabasinal and intrabasinal carbonate grains, which provided nuclei and sources for the precipitation and growth of carbonate cements. Other diagenetic alterations, such as pyrite and albitization, had no impact on reservoir quality. Scarce early diagenetic cements, coupled with abundant ductile carbonate and siliciclastic framework grains, have led to rapid porosity loss owing to compaction. Conversely, abundant quartz in the sandstones prevented rapid loss of porosity by mechanical compaction. Reservoir quality was affected by mesogenetic cementation by quartz overgrowths, calcite and dolomite intergranular pressure dissolution of quartz grains, and formation of fracture-filling calcite cement (δ 18O VPDB values from - 10.4% 0 to -7.8% 0; T h temperatures of ≈ 150° C), which are attributed to deep circulation of hot meteoric waters during extensional stages of tectonism. The results of this study illustrate that diagenetic evolution pathways of the arenites and sandstones are closely linked to the variation in detrital composition, particularly the proportion and types of extrabasinal noncarbonates, extrabasinal carbonates, and intrabasinal carbonate grains. These insights suggest that marine turbiditic hybrid arenites and calclithites of foreland basins are subjected to more rapid and extensive porosity loss owing to compaction and cementation than associated siliciclastic sandstones. Degradation of reservoir quality makes these hybrid arenites, calclithites, and sandstones suitable as tight gas reservoirs, but only if fracture porosity and permeability develop during tectonic deformation.

UR - http://www.scopus.com/inward/record.url?scp=70350146661&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=70350146661&partnerID=8YFLogxK

U2 - 10.2110/jsr.2009.060

DO - 10.2110/jsr.2009.060

M3 - Article

AN - SCOPUS:70350146661

VL - 79

SP - 711

EP - 735

JO - Journal of Sedimentary Research

JF - Journal of Sedimentary Research

SN - 1527-1404

IS - 10

ER -