De Lutte Formation DCHL

 

Premise Unit, defined by Van Adrichem Boogaert and Kouwe (1994). The De Lutte Formation is probably restricted to the Ems Low (see Figure A.2, section A) and its western margin. The Step Graben Formation is found in the northern and western offshore. The Strijen Formation is restricted to the Campine Basin. The upper Ketch Member of the Schooner Formation and the Brig Formation of Cameron (1993) are partial lithostratigraphic counterparts in the UK offshore.
Derivatio nominis Named after the village of De Lutte in the eastern part of the province of Overijssel, where the type well De Lutte-6 (see pdf) is located.
Type section Location map See figure (pdf)
  Well De Lutte-6 (pdf)
  Location N 52°19’49.7
E 07°00’50.8
  Depth 2232 to 2987 m
  Length 755 m along hole
Additional section Location map See figure (pdf)
  Well Emmen-7 (pdf)
  Location N 52°46’56.6
E 06°50’37.4
  Depth 3612 to NaN m
  Length NaN m along hole
  Well Well Anlo-1 (pdf)
  Location N 53°01’58.2
E 06°41’34.8
  Depth 3403 to NaN m
  Length NaN m along hole
Definition Succession of predominantly reddish-brown, but also greenish-grey or variegated, silty to very fine-grained sandy mudstones. The intercalated sandstone beds consist of correlatable sheets of 5 to 15 m thick. The sands are light grey, white, pink, or red, subangular to rounded, fairly- to well-sorted, fine- to medium-grained, with intercalations of coarse-grained, pebbly sand and conglomerate. The mudstone intercalations are between 10 and 100 m thick (average around 50 m). Carbonaceous particles are common in some intervals, but coal seams are practically absent.
Upper Boundary The formation is truncated by an unconformity, which also marks the top of the Limburg Group. The unit can be succeeded by the Lower Rotliegend, Upper Rotliegend or Zechstein Group.
Lower Boundary The De Lutte Formation rests conformably on the Tubbergen Formation. The uppermost major sandstone bed of the latter is overlain by an interval consisting predominantly of mudstones of at least 40 m thick. Above this level a significant decrease in sand/shale ratio is observed.
Correlation As a consequence of the diachronous transition into the Tubbergen Formation, the youngest basin-fringe occurrences of the latter are partial lateral equivalents of the De Lutte Formation in the centre of the basin (compare wells Dalen-7 and Norg Zuid-1).
Distribution Probably restricted to the Ems Low and its western margin. In the Netherlands the unit occurs mainly in easternmost Twente and central-eastern Drenthe. For the distribution of the equivalent deposits in Germany, see Hedemann (1984) , Selter (1990) and Tantow (1993) .
Age Late Westphalian C to Westphalian D, probably extending into the Stephanian. The age of the boundary between the Tubbergen Formation and the De Lutte Formation varies from Late Westphalian D in western Twente to latest Westphalian C or Early Westphalian D in eastern Twente and northern Drenthe (see also paragraph 2.14 Hunze Group under Age).
Depositional Setting The thick mudstone intervals and relatively thin sandstone beds reflect deposition in a predominantly well-drained, distal flood-plain setting. Sands were mainly deposited by sheet floods or minor fluvial systems. The alternation of sandstone and mudstone beds reflects outbuilding of fluvial-fan systems onto the flood plain. Some sandstone intervals are associated with minor intraformational unconformities.
Subdivision In the province of Drenthe, NAM has subdivided the formation into several local units (Erm, Oosterhesselen, Weerdinge, Runde and Fehndorf members).
References See References Upper Carboniferous

Van Adrichem Boogaert, H.A. & Kouwe, W.F.P., 1993-1997. [Stratigraphic unit]. In: Stratigraphic Nomenclature of the Netherlands.
Retrieved [Datum] from [url].