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ADMINISTRATIEVE & TECHNISCHE GEGEVENS
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Kaart-Nr: 17E
PLAAT: TURNHOUT
Nr: 398 (VIII, b)
Type Boring: Verkenningsboring & peilput S45 (peilbuizen b & c)
Topografische kaart: 8/8
Uitgevoerd te: TURNHOUT
Postnr: 2300
Adres boorplaats: Stadsmagazijn Everdongenlaan (Industrieterrein)
Opdrachtgever: SCK.CEN (gesubsidieerd door NIRAS.ONDRAF) cf. opm.1
Boorfirma: n.v. SMET-GWT
Boordatum: 1996
Topografie: opgetekend ter plaatse
Stalen door: boormeester en werfgeologen
Boringsmethode: spoelboring
Lengte & doormeters: peilb. a: 11 m + 5 m f.; peilb. b: 0-299 m + 46 m
filter 90 mm; peilb. c: 0-362 m + 42 m filter
Grondwaterstanden: zie opmerking 3.
1ste maal:
Bij rust : idem
Tijdens pompen:
Debiet:
Waterzaaknr:
totale diepte: 412 m
Stalen bewaard: ja
Maaiveld/ref. peil: +21.0 m
X: 190600
Y: 221400
NIS-code: 11040
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BOORBESCHRIJVING volgens G.C.S.: Lie Sun Fan et al. 1996
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van * tot * AARD DER GRONDLAGEN
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8.52- 12.52 Whitish-grey coarse sand with a low glauconite content
12.52- 16.52 Whitish-grey coarse sand with glauconite
16.52- 20.52 Whitish-grey coarse sand with glauconite
20.52- 24.52 Whitish-grey coarse sand with glauconite
24.52- 28.52 Whitish-grey coarse sand with glauconite
28.52- 32.52 Whitish-grey medium - coarse sand with
glauconite
32.52- 36.52 Dark grey medium - coarse sand with increasing glauconite
content
36.52- 40.53 Dark grey medium - coarse sand with glauconite
40.53- 44.53 Dark grey medium - fine sand with glauconite
44.53- 48.53 Dark grey fine sand with glauconite
48.53- 52.53 Dark grey medium - coarse clayey heterogeneous sand with
glauconite, mica, green minerals and lignite
52.53- 56.53 Whitish-grey coarse heterogeneous Q-sand with a low glauconite
content, mica and green minerals
56.53- 60.55 Whitish-grey coarse heterogeneous Q-sand with glauconite, mica
and green minerals
60.55- 64.55 Whitish-grey coarse heterogeneous Q-sand with glauconite, mica
and green minerals
64.55- 68.55 Whitish-grey coarse heterogeneous Q-sand with a low glauconite
content, mica and green minerals
68.55- 72.55 Whitish-grey coarse heterogeneous Q-sand withglauconite, mica,
lignite and green minerals
72.55- 76.57 Whitish-grey coarse heterogeneous Q-sand with glauconite, mica
and green minerals
76.57- 80.58 Dark grey fine sand with a high glauconite content and a few
shell fragments
80.58- 84.59 Dark grey fine sand with a high glauconite content and a few
shell fragments
84.59- 88.59 Dark grey coarse sand with a high glauconite content and a few
shell fragments
88.59- 92.59 Dark grey medium - fine sand with a high glauconite content
and a few shell fragments
92.59- 96.59 Dark grey fine clayey sand with a high glauconite content and
a few shell fragments
96.59-100.59 Dark grey fine sand with a high glauconite content, mica and
a few shell fragments
100.59-104.59 Dark grey fine sand with a high glauconite content,
lignite and a few shell fragments
104.59-108.59 Dark grey medium - fine sand with a high glauconite content and
a few shell fragments
108.59-112.60 Very dark grey fine sand with a high glauconite content and a
few shell fragments
112.60-116.60 Dark grey coarse heterogeneous sand with a high glauconite
content
116.60-120.61 Very dark grey fine sand with a high glauconite content and
coarse Q-grains
120.61-124.61 Very dark grey fine sand with a high glauconite content and
coarse Q-grains
124.61-128.61 Very dark grey fine sand with a high glauconite content
128.61-132.64 Very dark grey medium - fine sand with a high glauconite
content and coarse Q-grains
128.64-136.67 Black very fine sand with a high glauconite content
136.67-140.68 Very dark grey fine sand with a high glauconite content
140.68-144.70 Very dark grey fine sand with a high glauconite content and
coarse Q-grains
144.70-148.70 Very dark grey fine sand with a high glauconite content and
coarse Q-grains
148.70-152.70 Very dark grey fine sand with a high glauconite content and
coarse Q-grains
152.70-156.70 Very dark grey fine clayey sand with a high glauconite content
156.70-160.72 Very dark grey fine sand with a high glauconite content
160.72-164.73 Very dark grey medium - coarse sand with a high glauconite
content
164.73-168.75 Very dark grey fine sand with a high glauconite content and
small shell fragments
168.75-172.78 Very dark grey fine sand with a high glauconite content and
more shell fragments
172.78-176.78 Very dark grey clayey and fine sand with a high glauconite
content and shell fragments
176.78-180.79 Green-grey fine and clayey sand with a high
glauconite content, shell fragments and a few coarse Q-grains
180.79-184.82 Green-grey fine clayey sand with a high glauconite content
and coarse Q-grains
184.82-188.85 Green-grey fine clayey sand with a high glauconite content,
shell fragments and coarse Q-grains
188.85-192.88 Green-grey fine clayey sand with a high glauconite content and
coarse Q-grains
192.88-196.91 Green-grey fine clayey sand with a high glauconite content
196.01-200.91 Grey-green silty clay with glauconite
200.91-204.94 Grey-green clayey and coarse Q-sand, rich in glauconite
204.94-208.95 Green-grey clayey coarse sand, rich in glauconite, carbonate
fragments
208.95-212.98 Green grey clayey coarse sand, rich in glauconite, carbonate
fragments
212.98-216.98 Green-grey clayey coarse heterogeneous sand, rich in
glauconite, shell fragments
216.98-221.00 Green-grey clayey moderately coarse sand, rich in glauconite,
shell fragments
221.00-225.02 Green-grey clayey coarse sand, rich in glauconite, some shell
fragments
225.02-229.02 Green-grey clayey sand, rich in glauconite, some shell
fragments
229.02-233.02 Green-grey clayey sand, rich in glauconite, some shell
fragments
233.02-237.04 Green-grey clayey heterogeneous coarse sand, observed colours:
ocher, green and white, with shell fragments and some
foraminifers
237.04-241.07 Green-grey clayey sand with glauconite. Coarse Q and glauconite
grains are probably fall-out from higher levels
241.07-245.09 Green-grey clayey sand, rich in glauconite, some shell
fragments
245.09-249.10 Green-grey clayey sand, rich in glauconite, some shell
fragments
249.10-253.11 Green-grey clayey sand, rich in glauconite, some shell
fragments
253.11-257.14 Green-grey clayey sand, rich in glauconite, some shell
fragments
257.14-261.18 Green-grey clayey sand, rich in glauconite, some tube-like
carbonate fragments
261.18-265.18 Green-grey clayey sand, rich in glauconite, sometimes coarse
(see note), some shell fragments
265.18-269.20 Green-grey somewhat clayey sand, rich in finer glauconite,
some carbonate fragments
269.20-273.20 Green-grey somewhat clayey sand, rich in finer glauconite, some
carbonate fragments
273.20-277.22 Green-grey clayey silt, very rich inglauconite, some carbonate
fragments
277.22-281.25 Green-grey very sandy (coarse Q-grains) clay with glauconite
281.25-285.27 Green-grey very sandy clay (coarse Q-grains) with glauconite
285.27-289.30 Green-grey very sandy (coarse Q-grains) clay with glauconite
and echinoderm fragments
289.30-293.32 Green-grey and light green hard clay and coarse Q-grains
292.80-296.83 Coarse gravel with a lot of glauconite and suspended clay
(contamination)
296.83-300.86 Coarse gravel with a lot of glauconite and suspended clay
(contamination)
300.86-304.89 Coarse gravel with a lot of glauconite and suspended clay
(contamination)
304.89-308.89 Coarse gravel a lot of glauconite and suspended clay
(contamination)
308.89-312.92 Coarse gravel with a lot of and suspended clay (contamination)
312.92-316.93 Coarse gravel with a lot of glauconite and suspended clay
(contamination)
316.93-320.96 Coarse gravel with a lot glauconite suspended clay
(contamination)
320.96-324.96 Coarse gravel with a lot of glauconite and suspended clay
(contamination)
324.96-328.98 Coarse gravel with a lot of glauconite and suspended clay
(contamination
328.98-333.00 Coarse gravel with a lotof glauconite and suspended clay
(contamination
333.00-337.00 Grey clay with less contamination of gravel and glauconite
337.00-341.00 Grey clay with less contamination of gravel
341.00-345.02 Light grey clay with little contamination of gravel
345.02-349.05 Light grey clay
349.05-353.07 Light grey clay
353.07-357.08 Light grey silty clay with nummulites
357.08-361.09 Light grey silty clay with nummulites
361.09-365.12 Light grey silty clay with nummulites
365.12-369.16 Light grey silty clay with echinoderm fragments and nummulites
369.16-373.16 Light grey clay nummulites and sandstone fragments with
glauconite
373.16-377.17 White-grey clay and silty grey clay with nummulites, echinoderm
and sandstone fragments
377.17-381.17 White-grey sandstone fragments with glauconite and white clay
with echinoderm fragments and nummulites
381.17-385.19 White-grey and grey clay with a lot of sandstone fragments with
glauconite and echinoderm fragments and nummulites
385.19-389.22 Sandstone fragments, light grey with glauconite, some
nummulites and echinoderm fragments, less clayey
389.22-393.24 Somewhat more clayey, sandstone fragments, nummulites
393.24-397.27 Abundant sandstone fragments and nummulites, almost no clay in
the cuttings, abundant glauconite
397.27-401.29 Sandstone fragments with glauconite, nummulites. Coarse sand
may be contamination (drilling fluid has been diluted)
401.29-405.31 Clayey coarse sand Sand fraction inspected on sieve (250
micrometer): shell fragments, some grey clay fragments, some
echinoderm fragments and black grains (glauconite?)
405.31-409.33 Shell fragments and echinoderm fragments, coarse-grained
glauconite, very clayey (average grain size: 1 mm)
409.33-411.92 Very clayey, coarse shell fragments (3 mm) and coarse black
glauconite (this observation disagrees with the grey clay and
brown-grey compact clay collected directly on a sieve while
drilling)
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STRATIGRAFISCHE INTERPRETATIE
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Top * basis * STRATIGRAFISCHE EENHEDEN
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8.0- 32 m Poederlee Formation Brasschaat Sand
32.0- 52 m Formation Lillo/Poederlee and Mol Sand
52.0- 76 m Kasterlee Formation
76.0-116 m Diest Formation
116.0-160 m Berchem Formation Berchem Sand
160.0-180 m Currently unassigned Currently unassigned
180.0-296 m Boom Formation Boom Clay
? -312 m Zelzate Formation Ruisbroek Sand
312/321 m Maldegem Formation S3
321/325 m A3
325/329 m S2
329/337.5 A2
337.5-347 m S1
347.0-360 m A1 Asse Clay
360.0-368 m Wemmel Sand
368.0-400? m Lede and Brussel Lede and Brussel Sand
400? -407 m Formations Ieper Group Egem Sand
407.0-(412) m Aalbeke Clay
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AUTEUR G.C.S. (Lie Sun Fan et al. 1996)
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OPMERKINGEN
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1. Het doel van de studie is de bouw en verbetering van het regionaal
hydrogeologisch model
2. Commentaar bij de stratigrafische interpretatie:
Brasschaat Sand(8-32 m).
This unit is a coarse-grained whitish-grey quartz sand with a low
glauconite content. The top of the unit was not recognised.
Lillo-Poederlee Formation (32-52 m
This formation consists of medium - coarse dark-grey sand with glauconite.
Kasterlee Formation (52-76 m)
This sand is coarse, whitish-grey and heterogeneous (glauconite, mica
and green minerals).
Diest Formation (76-116 m)
Fine and coarse dark green-grey sand, rich in glauconite.
Berchem Formation (116- 160 m)
The Berchem Sand consists of fine green-grey sand that is rich in glauconite
and with some shell banks. The boundary between the Berchem Sand and the Boom
Clay could not be traced precisely using the cuttings because of a major
contamination of glauconite and gravel. Currently unassigned (160-180 m)
Formerly, this stratigraphic unit was erroneously referred to as the
Eigenbilzen Formation. Its distinctive pattern is quite clear on the
resistivity log. From 150 m downwards the clay content progressively
increases.
Boom Formation (180-296 m)
The Boom Clay could not be recognised in the cuttings because of
contamination from higher levels. Only from the ROP log and the different
logging parameters a boundary could be traced. At 170 m the clay becomes very
compact. However, the resistivity still decreases below that level to become
quite low only at 195 m. The natural gamma reaches a high and constant level
at a depth of 180 m. At a depth of 254 m the resistivity increases slowly and
at the same depth the natural gamma decreases. Cuttings show a gradual
increase in silt content from 255 m downwards. There are several hard banks
in the Boom Formation. A characteristic feature of the Boom Clay are two
silt layers ("dubbelband"), recognised at 272 m depth.
Ruisbroek Sands - Zelzate Formation (? -312 m) These silty sand units have
a low glauconite content.
S3 (312 - 321 m) and A3 (321-325 m) - Maldegem Formation
Grey-green clay with bioturbations and pyrite (concretions and tubes). The top
is more silty.
S2 - Maldegem Formation (325 -329 m)
Dark green-grey clayey sand. S2 could only be recognised on the resistivity
and natural gamma logs.
A2 - Maldegem Formation (329 -337.5m)
Grey-green clay that becomes progressively more silty at the base.
S1 - Maldegem Formation (337.5-347 m)
Green-grey silty clay with a few foraminifers and black spots.
A1 Asse Clay - Maldegem Formation (347-360 m)
Grey-green clay with greenish hue and black spots. The Bande Noire
can be recognised on the gamma-gamma log around a depth of 355 m, and is taken
as the basis of the Asse Clay.
Wemmel Sand - Maldegem Formation (360-368 m)
An alternation of glauconite-rich sand and light green-grey clay. Glauconite
grains are coarse and strongly concentrated at some levels. Numerous
nummulites are found in this interval. The boundary with the underlying
formation is characterised by the first appearance of hard banks.
Lede and Brussel Sand- Lede and Brussel Formations (368-400? m)
An alternation of glauconite-rich silty clay, sand and hard banks containing
nummulites and shell fragments at the base. At 66.16 m, there are abundant
fossils including large nummulites and echinoderm fragments. At 380 m there
is a strong increase in clay content in the cuttings. Hard banks were
recognised between 360-400 m depth. The depths of the hard banks are the same
for the ROP and the results of the short and long normal logging.
Egem Sand - Ieper Group (400?-407 m)
In the cuttings no distinction could be made between the Lede, Brussel and
Egem Sand. However, on the resistivity and the natural gamma logs their
distinctive patterns can be recognised.
Aalbeke Clay - Ieper Group (407-412 m)
The Aalbeke Clay corresponds to the clayey top of the Ieper Group. The light
green-grey, occasionally brown clay is very hard and compact. The bottom of
this unit was not reached.
3. Grondwaterstanden:
peil in rust in a op 13/02/97: 0.71 m onder maaiveld
peil in rust in b op 11/12/96: 1.31 m onder maaiveld
peil in rust in c op 11/12/96: 4.20 m onder maaiveld
peil in b, na het pompen in b aan 1300 l/u (gedurende 15 min): 40.8 m onder
maaiveld
peil in c, na het pompen in c aan 2500 l/u (gedurende 12 min): 6.58 m onder
maaiveld
