Late Ordovician glaciogenic reservoir heterogeneity: An example from the Murzuq Basin, Libya

Heron, Daniel Paul Le; Craig, Jonathan; Sutcliffe, Owen E.; Whittington, R J

doi:10.1016/j.marpetgeo.2006.05.006

Cited by 58 publications

(45 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Lower Palaeozoic succession ( Fig. 1a & d) comprises a Cambrian to Ordovician transgressive wedge (fluvial to shallowmarine succession), an end-Ordovician, erosion-based glacially-related unit, overlain by a Silurian to Early Devonian regressive wedge (inner shelf to fluvial) (Bellini and Massa, 1980;Boote et al, 1998;Davidson et al, 2000;Abugares, 2003;Eschard et al, 2005;Le Heron et al, 2006, 2010Ghienne et al, 2007aGhienne et al, , 2013.…”

Section: Geological and Glacial Settingsmentioning

confidence: 99%

“…Preserved glacial landsystems that have contributed to their characterisation in the Quaternary record (Shaw et al, 2000;Boulton et al, 2001;Lajeunesse and Allard, 2002;Ottesen et al, 2005;Boulton and Hagdorn, 2006;Occhietti, 2007;Evans, 2009;Winsemann et al, 2009;Jakobsson et al, 2012) are usually lacking for the identification of pre-Pleistocene ice-marginal systems. This is a severe limitation in our capacity to untangle former ice-sheet extents in deep time and in our capacity to propose sequence stratigraphic scenarios for related recessional ice-front development, whose associated deposits are nevertheless amongst the most abundant in the Earth glacial sedimentary record (Moncrieff and Hambrey, 1990;dos Santos et al, 1996;Von Brunn, 1996;Le Heron et al, 2006;Ghienne et al, 2007b). Ice-marginal depositional systems are of considerable economic importance as related deposits are genetically linked with groundwater reservoirs in Europe (e.g., Burval working group, 2009) or with gravel and sand quarries in Europe and America (e.g., Cutler et al, 2002;Winsemann et al, 2007) and are part of glaciogenic Palaeozoic or older petroleum systems in the Middle East and North Africa (Davidson et al, 2000;Bechstädt et al, 2009;Le Heron et al, 2009;Lottaroli et al, 2009;Roussé et al, 2009;Craig et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Sedimentary imprints of former ice-sheet margins: Insights from an end-Ordovician archive (SW Libya)

Girard

Ghienne

Du-Bernard

et al. 2015

Earth-Science Reviews

View full text Add to dashboard Cite

Section: Geological and Glacial Settingsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sedimentary imprints of former ice-sheet margins: Insights from an end-Ordovician archive (SW Libya)

Girard

Ghienne

Du-Bernard

et al. 2015

Earth-Science Reviews

View full text Add to dashboard Cite

“…Glacial depositional sequences, comprising a range of alluvial plain to shelf sediments (see below), were deposited on top of these surfaces during ice recession towards the south, and during ensuing interglacials. Four to five depositional sequences occur in Mauritania (Ghienne, 2003), Libya (Gargaf Uplift: Deynoux et al, 2000;Ghienne et al, 2003; western Murzuq Basin: Moreau, 2005;Moreau et al, 2005;Le Heron et al, 2006) and Jordan (Turner et al, 2005). In Mauritania and Libya, the most extensive ice sheet (e.g.…”

Section: Areas Closest To the Ice Centrementioning

confidence: 99%

“…In the Murzuq Basin (Libya), the depositional succession of the Hirnantian glacial record has been studied extensively (McDougall and Martin, 2000;Deynoux et al, 2000;Sutcliffe et al, 2000;Ghienne et al, 2003;El-ghali, 2005;Le Heron et al, 2006). Most of the interpretations are based on field studies conducted in the Gargaf area, in the northern Murzuq Basin.…”

Section: The Middle Glaciated Shelf: Western Libyamentioning

confidence: 99%

The Late Ordovician Glacial Sedimentary System of the North Gondwana Platform

Ghienne

Heron

Moreau

et al. 2007

Glacial Sedimentary Processes and Products

Self Cite

133

View full text Add to dashboard Cite

The Late Ordovician (Hirnantian) glaciation is examined through the North Gondwana record. This domain extended from southern high palaeo-latitudes (southeastern Mauritania, Niger) to northern lower palaeo-latitudes (Morocco, Turkey) and covered a more than 4000 km-wide section perpendicular to ice-flow lines. A major mid-Hirnantian deglaciation event subdividing the Hirnantian glaciation in two first-order cycles is recognised. As best illustrated by the glacial record in western Libya, each cycle comprises 2-3 glacial phases separated by ice-front retreats several hundreds kilometres to the south. From ice-proximal to ice-distal regions, the number of glacial surfaces differentiates (i) a continental interior with post-glacial reworking of the glacial surfaces), (ii) a glaciated continental shelf that is subdivided into inner (1-2 surfaces), middle (2-5 surfaces) and outer (a single surface related to the glacial maximum) glaciated shelves, and (iii) the non-glaciated shelf. Ice-stream-generated glacial troughs, 50-200 km in width, cross-cut these domains. These troughs are zones of preferential glacial erosion and subsequent sediment accumulation. A glacial depositional sequence, bounded by two glacial erosion surfaces, records one glacial phase. The position either within or outside a glacial trough controls the stratigraphic architecture of a glacial sequence. Glaciomarine outwash diamictites are developed at or near the maximum position of the ice-front. During ice-sheet recession, and in an ice-stream-generated trough, a relatively thin sediment cover blankets the foredeepened erosion surface. An initial rapid ice-sheet withdrawal is inferred. Marine-terminating ice fronts then evolve later into more slowly retreating, land-terminating ice fronts. In adjacent inter-stream areas where a more gradual ice-sheet recession occurred, fluvioglacial deposits prevailed. The progradation of a delta-shelf system, coeval with fluvial aggradation, that may be locally interrupted by a period of isostatic rebound, characterises the late glacial retreat to interglacial conditions. This model should facilitate the sequence stratigraphic interpretation of Late Ordovician glacial deposits and other ancient glacial successions.

show abstract

“…This region straddles southeastern Algeria and southwestern Libya. The Late Ordovician glaciogenic succession in the Libyan part of the Tassili N'Ajjer region has been studied in detail Le Heron et al 2006;Moreau 2011), but comparatively little has been published to date on the Algerian side since the landmark memoir of Beuf et al (1971), with the exception of Eschard et al (2005). Spectacular successions crop out in the Djanet -Illizi region, where the Late Ordovician succession has been subject to some limited study (Hirst et al 2002;Le Heron 2010b;Hirst 2012).…”

Section: Late Ordovicianmentioning

confidence: 99%

Glaciogenic reservoirs and hydrocarbon systems: an introduction

Huuse

Heron

Dixon

et al. 2012

View full text Add to dashboard Cite

Glaciogenic reservoirs host important hydrocarbon and groundwater resources across the globe. Their complexity and importance for exploration and palaeoclimate reconstruction have made glaciogenic successions popular subjects for study. In this paper we provide an overview of the palaeoclimatic and tectonic setting for Earth glaciation and a chronological account of glaciogenic deposits since c. 750 Ma, with particular emphasis on their reservoir potential and associated hydrocarbon systems. Hydrocarbon accumulations within glaciogenic reservoirs occur principally in Palaeozoic (Late Ordovician and Permo-Carboniferous) sandstones in South America, Australia, North Africa and the Middle East, with relatively minor occurrences of shallow gas hosted in Pleistocene deposits in the North Sea and Canada. Groundwater reserves occur within glaciogenic sandstones across the northern European lowland and in North America. The main glaciogenic environments range from subglacial to glacier front to proglacial and deglacial. Rapidly changing environments, hydrodynamic regimes and glacier-front and subglacial deformation often result in very complex glaciogenic sequences with significant challenges for reconstruction of their origin and resource importance, which this volume seeks to address.

show abstract

Late Ordovician glaciogenic reservoir heterogeneity: An example from the Murzuq Basin, Libya

Cited by 58 publications

References 28 publications

Sedimentary imprints of former ice-sheet margins: Insights from an end-Ordovician archive (SW Libya)

Sedimentary imprints of former ice-sheet margins: Insights from an end-Ordovician archive (SW Libya)

The Late Ordovician Glacial Sedimentary System of the North Gondwana Platform

Glaciogenic reservoirs and hydrocarbon systems: an introduction

Contact Info

Product

Resources

About