Evolution of provenance in the NE Atlantic rift: The Early–Middle Jurassic succession in the Heidrun Field, Halten Terrace, offshore Mid-Norway

Detrital Rutile Geochemistry and Thermometry as Guides to Provenance of Jurassic-Paleocene Sandstones of the Norwegian Sea

“…The source of the MN4 sand type is interpreted to lie in central East Greenland (Fig. 1), on account of the zircon age data, the presence of similar MN4 sandstones in the Cretaceous of the Kangerlussuaq area (Whitham et al 2004), and on the occurrence of moraine in East Greenland with similar characteristics (Morton et al 2009). …”

“…Five different sand types (termed MN1, MN2, MN3, MN4, and MN5) have been identified in the Jurassic-Paleocene of the Norwegian Sea on the basis of variations in the provenancesensitive heavy-mineral ratios apatite:tourmaline (ATi), garnet:zircon (GZi), rutile:zircon (RuZi), monazite:zircon (MZi) and chrome spinel:zircon (CZi), garnet geochemistry, tourmaline geochemistry, and detrital zircon geochronology (Morton et al, 2005a(Morton et al, , 2005b(Morton et al, , 2009). These five sand types are interpreted as being derived from different source areas that lay to the east (Scandinavia) and west (Greenland) of the Norwegian Sea (Fig.…”

“…This case study deals with Jurassic, Cretaceous, and Paleocene sandstones from the Norwegian Sea (Fig. 1), which have already been extensively studied using a combination of provenance-sensitive heavy mineral ratios, garnet geochemistry, tourmaline geochemistry, and detrital zircon geochronology (Fonneland et al 2004;Morton et al 2005a;Morton et al 2005b;Morton et al 2009). Additional objectives of the study were to provide additional constraints on composition and metamorphic grade of the ultimate source regions and to assess the value of rutile geochemistry in the more deeply-buried parts of the basin where some key provenance indicator minerals (notably garnet) are absent due to diagenetic modification (Walderhaug and Porten 2007).…”

Depositional evolution of a progradational to aggradational, mixed-influenced deltaic succession: Jurassic Tofte and Ile formations, southern Halten Terrace, offshore Norway

“…The succession hosts significant oil and gas resources on the Halten Terrace (e.g. Alve, Åsgard, Heidrun, Kristin, Mikkel, Morvin, Njord, Norne, Skalv, Skuld and Urd fields; Harris, 1989;McIlroy, 2004;Morton et al, 2009; Norwegian Petroleum Directorate (NPD), 2016), but reservoir distribution and character are difficult to predict away from limited well penetrations in the southern Halten Terrace.…”

“…However, the abundance of coarse grained, extra-basinal sediment, which cannot be derived from reworking the finer grained, underlying successions, precludes local, intra-basinal source areas. It has been proposed that some of the sediment at the Halten Terrace was derived from Greenland (Morton et al, 2009). However, the presence of a palaeo-high between the Baltic Shield and Greenland (Doré, 1992;Nøttvedt et al, 2008;Eide et al, 2016) precludes a source of sediment as far Greenland ( Figure 12A).…”