Heavy-Mineral Stratigraphy of the Clair Group (Devonian– Carboniferous) in the Clair Field, West of Shetland, U.K.

Morton, Andrew; Hallsworth, C. R.; Kunka, J.; Laws, Ewan; Payne, S. N. J.; Walder, Dave

doi:10.2110/sepmsp.094.183

Cited by 16 publications

(17 citation statements)

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“…Its composition is known to be controlled by the composition of its source rock (Belousova et al, 2002;Morton and Yaxley, 2007), and U-Pb dating of apatite is becoming more widely used (Chew and Donelick, 2012). The morphology of detrital apatite has been previously employed to evaluate the relative influences of fluvial and aeolian transport (Mange-Rajetzky, 1995;Morton et al, 2010), since apatite is markedly less durable than zircon owing to its lower hardness. Although apatite is stable during diagenesis, it is highly unstable during weathering and is therefore an important indicator of the extent of floodplain residence, during which sediment compositions are modified by weathering (Morton et al, 2012;Hurst and Morton, 2014).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Roundness of heavy minerals (zircon and apatite) as a provenance tool for unraveling recycling: A case study from the Sefidrud and Sarbaz rivers in N and SE Iran

Zoleikhaei

Frei

Morton

et al. 2016

Sedimentary Geology

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Section: Accepted Manuscriptmentioning

confidence: 99%

Roundness of heavy minerals (zircon and apatite) as a provenance tool for unraveling recycling: A case study from the Sefidrud and Sarbaz rivers in N and SE Iran

Zoleikhaei

Frei

Morton

et al. 2016

Sedimentary Geology

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“…The fully cored well 206/8-8 ( Figure 13) was used for this purpose. Variations in a number of key parameters enable subdivision of the succession into two major lithostratigraphic units, the Lower Clair Group and the Upper Clair Group [37,73]. The Lower Clair Group has been further subdivided into Units I-VI, with the Upper Clair Group comprising Units VII-X.…”

Section: Application Of Heavy Mineral Stratigraphy At the Well Site: mentioning

confidence: 99%

“…The criteria used in the Clair Field correlation scheme are the apatite:tourmaline index (ATi), apatite roundness index (ARi), garnet:zircon index (GZi), rutile:zircon index (RuZi), and staurolite:zircon index (SZi), as defined by Morton and Hallsworth [33], Morton et al [72], and Morton et al [73]. In addition, the abundance of the unstable minerals epidote and titanite, and the associated unstables:tourmaline index (UTi), have proved useful locally in parts of the field.…”

Section: Application Of Heavy Mineral Stratigraphy At the Well Site: mentioning

confidence: 99%

“…Variations in these parameters are due to a combination of provenance, transport history, and diagenetic factors. Provenance variations result from the interplay between an axial sediment transport system and sediment of local derivation from an adjacent basement high, together with longer-term variations in sediment composition supplied by the axial system and a fundamental shift in provenance at the Lower Clair Group-Upper Clair Group boundary [37,73,74]. The highest ARi values are found in Units III and V ( Figure 13), which display the greatest aeolian influences in the succession.…”

Section: Application Of Heavy Mineral Stratigraphy At the Well Site: mentioning

confidence: 99%

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Correlation of Hydrocarbon Reservoir Sandstones Using Heavy Mineral Provenance Signatures: Examples from the North Sea and Adjacent Areas

Morton

McGill²

2018

Minerals

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Correlation of hydrocarbon reservoir sandstones is one of the most important economic applications for heavy mineral analysis. In this paper, we review the fundamental principles required for establishing correlation frameworks using heavy mineral data, and illustrate the applications of a wide variety of heavy mineral techniques using a number of case studies from hydrocarbon reservoirs in the North Sea and adjacent areas. The examples cover Triassic red-bed successions in the central North Sea and west of Shetland, which have been subdivided and correlated using provenance-sensitive ratio data and mineral morphologies; Middle Jurassic paralic sandstones in the northern North Sea, correlated using garnet geochemistry; Upper Jurassic deep water sandstones in the northern North Sea, discriminated using rutile geochemistry and detrital zircon age data; and the “real-time” application of the technique at well site in Devonian-Carboniferous fluvio-lacustrine sandstones of the Clair Field, west of Shetland.

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“…The lack of biostratigraphic data means that other tools have to be sought to test the correlation of units within and between basins. Key provenance parameters may be identified and could be used for chemostratigraphy to correlate the sedimentary units within and between basins, as has been shown for the Clair Group west of the Shetland Islands (Morton et al 2010). In general, understanding the origin of sedimentary units is important for reconstructions of palaeosource areas and sediment transport.…”

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confidence: 99%

Insights into crust formation and recycling in North Africa from combined U–Pb, Lu–Hf and O isotope data of detrital zircons from Devonian sandstone of southern Libya

Meinhold

Morton

Fanning

et al. 2013

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Combined U -Pb, Lu-Hf and O isotope data of detrital zircons from the Devonian sandstone of southern Libya provide important new boundary parameters for reconstruction of palaeosource areas and sediment transport and may lead to novel approaches to test current plate tectonic models, with important implications for our understanding of the evolution of northern Gondwana (in present-day coordinates) during the Palaeozoic. Detrital zircon U-Pb ages from Devonian sandstone of the eastern margin of the Murzuq Basin show four main age populations: 2.7-2.5 Ga (13%), 2.1-1.9 Ga (10%), 1.1-0.9 Ga (25%) and 0.7-0.5 Ga (46%). The ubiquitous occurrence of c. 1.0 Ga detrital zircons is characteristic of the Saharan Metacraton sedimentary cover sequence and provides new insights into palaeogeographic reconstructions of Gondwanaderived terranes in the Eastern Mediterranean and SW Europe. The Lu-Hf isotope data suggest that zircons crystallized within a narrow time interval from magmas with heterogeneous Hf isotope compositions. These magmas were derived by melting of pre-existing rocks, rather than being juvenile. The calculated Hf model ages range from 3.7 Ga to 1.3 Ga, with a major population between 2.8 Ga and 1.9 Ga, indicating prominent recycling of Archaean and Palaeoproterozoic crust.

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Heavy-Mineral Stratigraphy of the Clair Group (Devonian– Carboniferous) in the Clair Field, West of Shetland, U.K.

Cited by 16 publications

References 0 publications

Roundness of heavy minerals (zircon and apatite) as a provenance tool for unraveling recycling: A case study from the Sefidrud and Sarbaz rivers in N and SE Iran

Roundness of heavy minerals (zircon and apatite) as a provenance tool for unraveling recycling: A case study from the Sefidrud and Sarbaz rivers in N and SE Iran

Correlation of Hydrocarbon Reservoir Sandstones Using Heavy Mineral Provenance Signatures: Examples from the North Sea and Adjacent Areas

Insights into crust formation and recycling in North Africa from combined U–Pb, Lu–Hf and O isotope data of detrital zircons from Devonian sandstone of southern Libya

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