SWIM 2004

ONBOARD PRELIMINARY SAMPLING REPORT

( LOCAL TIME)

27 Agosto 2004

Leaving from Faro at 19.00 (local time) for sampling point C32 (see General Map of Sampling Sites) in the Tagus Plain (violet square on Fig.1).

28 Agosto 2004

The transit is modified because of the bad weather conditions and new sampling points are selected across the southwestern Portuguese margin (Fig. 1)

Fig. 1

29 Agosto 2004

Working area across the southwestern Portuguese continental margin (Fig.1)

Site SWIM04-05 (Dredge) (red arrow on Figs.2 and 3)

Starting Lat: 37 10.297' Long: -9 47.442' depth: 2986

Ending Lat: 37 11.023' Long: -9 46.146' depth: 2450

Recovery: gray Mud.

Fig. 2

Site SWIM04-06 (Dredge) (Blue Arrow on Figs. 2 and 3)

Starting Lat: 37 09. 52' Long: -9 46.18' depth: 2790

Ending Lat: 37 10.14' Long: -9 46. 29' depth: 2450

Recovery: null

Fig.3 – Acoustic detail by TOBI Survey of the sampled structure (Bow Spur) (After Eulalia et al., 2001)

Site SWIM04-07 (Dredge) (red arrow on Fig. 4)

Starting Lat: 37 23.0' Long: -9 42.0' depth: 2990

Ending Lat: 37 30.0' Long: -9 41.0' depth: 2200

Recovery: 1 small piece of Upper Jurassic (?) light orange dolomitized limestone. Size 7x6.5x3 cm (Fig. 4A) .

Fig. 4

Fig.4A

30 Agosto 2004

Working area Southwestern of Cabo S. Vincente (Fig.5)

Site SWIM04-08 (4 m Gravity Core) (yellow circle on Fig.5)

Starting Lat: 36 42.9429' Long: -9 05.7681' depth: 885.8 m

SeaBottom Lat: 36 42.9437' Long: -9 05.7510' depth: 885.7 m

Cable: 913 m

Ending Lat: 36 42.9589' Long: -9 05.7610 depth: 885.7 m

Recovery: 50 cm of mud and bioclastic sand.

Fig. 5

Site SWIM04-09 (8 m Gravity Core) (brown circle on Fig. 5)

Starting Lat: 36 44.4151' Long: -9 06.0009' depth: 724.3 m

Seabottom Lat: 36 44.4084' Long: -9 06.0086' depth: 725.9 m

Ending Lat: 36 41.9897' Long: -8 59.6668' depth: 748.8 m

Recovery: 190 cm of Mud and bioclastic Sand .

Site SWIM04-10 (8 m Gravity Core) (red circle on Fig. 5)

Starting Lat: 36 41.9788' Long: -8 59.6659 depth: 749.9 m

Seabottom Lat: 36 41.9867' Long: -8 59.6747' depth: 750.0 m

Ending Lat: 36 41.9853' Long: -8 59.6763' depth: 750.3 m

Recupero: 320 cm of gray silty Mud.

Site SWIM04-11 (8 m Gravity Core) (violet circle on Fig. 5)

Starting Lat: 36 41.1343' Long: -9 05.8898 depth: 892.5 m

Seabottom Lat: 36 43.1480' Long: -9 06.8967' depth: 890.6 m

Ending Lat: 36 43.1299 Long: -9 05.9271 depth: 900.9 m

Recovery: 120 cm of gray silty Mud.

Site SWIM04-12 (Grab) (green circle on Fig. 5)

Seabottom Lat: 36 43.1416' Long: -9 05.9225' depth: 896.5 m

Recovery: Grab is full of light brown Mud

31 Agosto 2004

Working area next to the Tagus Plain (Fig.6).

Site SWIM04-13 (10 m Gravity Core) (red circle on Fig. 6)

target Lat: 37 41.986718' Long: -10 43.294205 depth: 4885 m

Starting Lat: 37 42.0086' Long: -10 43.3004' depth: 4997 m

Seabottom Lat: 37 41.9973' Long: -10 43.2769' depth: 4994 m

Ending Lat: 37 41.8660 Long: -10 42.5337' depth: 4843 m

Recovery: 359 cm of gray Mud

Fig.6

1 Settembre 2004

Working area across the canyon of the Portuguese margin and in the Tagus Plain (Fig.6)

Site SWIM04-14 (10 m Gravity Core) (yellow circle on Fig. 6 and arrow on Fig. 7)

Target Lat: 37 27.78' Long: -10 35.60' depth: 4689 m

Starting Lat: 37 27.7669' Long: -10 35.6159' depth: 4885 m

Seabottom Lat: 37 27.7710' Long: -10 35.5774' depth: 4896 m

Cable: 5025m (cable strenght: 11 ton; Fig. 8)

Ending Lat: 37 27.9751 Long: -10 35.1222' depth: 4851 m

Recovery: 85 cm + 11 cm core catcher of Miocene (?) green shaly Marls (Fig. 9) with red patches somewhere. Miocene uncunformity (?)

Fig.7

Fig. 8

Fig .9

Site SWIM04-15 (10 m Gravity Core) (green circle on Fig. 6)

Target Lat: 37 34.8300' Long: -11 13.1200' depth: 5200 m

Starting Lat: 37 34.8548' Long: -11 12.9887' depth: 5190 m

Seabottom Lat: 37 34.8418' Long: -11 13.1419' depth: 5189 m

Ending Lat: 37 34.9277' Long: -11 12.8693' depth: 5188 m

Coring trouble (see Fig.10)

Recovery: 117 cm + core catcher of fine sand.

FIG.10

2 Settembre 2004

Working area south of Cabo S. Vincente (Fig.11)

Site SWIM04-16 (Dredge) (red arrow on Fig. 11)

Starting Lat: 36 23.7227' Long: -9 0.0610' depth: 2900.3 m

Seabottom Lat: 36 24.2386' Long: -8 59.9933' depth: 2708.2 m Cable: 3310 m

Working Lat: 36 25.0599' Long: -8 59.9770' depth: 2200 m Cable: 4800 m

Working* Lat: 36 25.2149' Long: -8 59.9758' depth: 2141 m Cable: 4786 m

Working* Lat: 36 25.4451' Long: -8 59.9795' depth: 2081 m Cable: 4503 m

Working Lat: 36 25.5137' Long: -8 59.9679' depth: 2060 m Cable: 4400 m

Seabottom Lat: 36 26.3467' Long: -8 59.9534' depth: 1777 m Cable: 2331

Ending Lat: 36 26.3758' Long: -8 59.9561' Prof: 1777 m

Recovery: ocraceous and grey Mud enveloping red silty mud metric beds with animal burrowing, and irregular pieces of white limestones (Miocene or Mesozoic ?) and bioclastic calcarenites.

Fig.11

Samples:

17 pieces of limestones

23 pieces of calcarenites (Fig. 12 b, c)

1 box of small pieces of reddish silty muds

6 metric beds of red silty muds (Fig. 12a)

Fig. 12

Site SWIM04-17 (10 m Gravity Coring) (blue circle on Fig. 11)

Target Lat: 36 33.9100' Long: -9 00.6000' depth: 2225 m

Starting Lat: 36 33.9130' Long: -9 00.6003' depth: 2117 m

Seabottom Lat: 36 33.9119' Long: -9 00.5998' depth: 2118 m

Ending Lat: 36 33.9127' Long: -9 00.5966' depth: 2117 m

Recovery: 158 cm + 8 cm core catcher of dark gray mud. At the top plastic light gray mud.

Site SWIM04-18 (4 m Gravity Core) (red circle on Fig. 11)

Target Lat: 36 20.6687' Long: -8 54.9422' depth: 3120 m

Starting Lat: 36 20.6686' Long: -8 54.9411' depth: 3132 m

Seabottom Lat: 36 20.6694' Long: -8 54.9691' depth: 3131 m

Ending Lat: 36 20.6009' Long: -8 55.0897' depth: 3130 m

Recovery: 173 cm of plastic gray Mud.

3 Settembre 2004

Working area Coral Patch Ridge across the seismic line AR07 (Fig.13)

Site SWIM04-19 (Core) (red circle on Fig.13)

Target Lat: 35 23.8621' Long: -10 54.4799' Prof: 4377 m

Aborted because of bad whatering

Fig. 13

Site SWIM04-20 (Dredge) (red arrow on Figs. 13 e 14)

Starting Lat: 35 24.6739' Long: -10 54.7970' depth: 4387 m

Seabottom Lat: 35 23.3967' Long: -10 54.3198' depth : 4153 m cable: 5750 m

Working Lat: 35 22.9115' Long: -10 54.1032' depth: 4139 m cable: 5650 m

Working Lat: 35 22.8189' Long: -10 54.0493 depth: 4140 m cable: 5402 m

Seabottom Lat: 35 22.5374' Long: -10 54.8380 depth: 4146 m cable: 4146 m

Ending Lat: 35 21.2468' Long: -10 53.0552 depth: 4020 m

Recovery: null

Fig. 14

4 Settembre 2004

Example of Chirp profile across the Seine plain (Fig. 15). Working area across The Coral Patch Ridge.

Fig.15

Site SWIM04-21 (4 m Gravity Core) (red circle on Fig. 13 and red arrow on Fig. 14)

Target Lat: 35 23.8621' Long: -10 54.4799' depth: 4377 m

Starting Lat: 35 23.8717' Long: -10 54.5022' depth: 4338 m

Seabottom Lat: 35 23.8623' Long: -10 54.4825' depth: 4335 m

Ending Lat: 35 23.8793' Long -10 54.5527' depth: 4341 m

Recovery: 293 cm of light brow oozes .

Site SWIM04-22 (4 m Gravity Core) (red circle on Fig. 13 and red arrow on Fig. 14)

Target Lat: 35 23.5954' Long: -10 54.383072' depth: 4300 m

Starting Lat: 35 23.5957' Long: -10 54.38370' depth: 4303 m

Seabottom Lat: 35 23.5936' Long: -10 54.38130' depth: 4299 m

Ending Lat: 35 23.7137' Long: -10 54.52010' depth: 4298 m

Recovery: 290 cm of light brown oozes.

5 Settembre 2004

Working area across the Coral Patch Seamount (Fig.16)

Site SWIM04-23 (Grab) (violet circle on Fig.16)

Seabottom Lat: 34 57.4845' Long: -11 53.2248' depth: 936.2 m

Recovery: bioclastic sands with corals, pteropods and molluscs.

Site SWIM04-24 (Grab) (violet circle on Fig.16)

Seabottom Lat: 34 57.1886' Long: -11 54.3686' depth: 965 m

Recovery: null

Site SWIM04-25 (Grab) (violet circle on Fig.16)

Seabottom Lat: 34 56.9759' Long: -11 55.1617' depth: 800 m

Recovery: null

Site SWIM04-26 (Grab) (violet circle on Fig.16)

Seabottom Lat: 34 56.3798' Long: -11 57.4512' depth: 675 m

Recovery: null

Site SWIM04-27 (Grab)(violet circle on Fig.16)

Seabottom Lat: 34 58.2230' Long: -11 57.3555' depth: 1052 m

Recovery: null

Site SWIM04-28 (Dredge) (red arrow on Fig. 16)

Starting Lat: 34 57.2124' Long: -11 54.3041' depth: 958.2 m

Seabottom Lat: 34 57.2019' Long: -11 54.7258' depth: 897.2 m cable: 1100 m

Working Lat: 34 56.9636' Long: -11 55.2546' depth: 803.2 m cable: 1871 m

Working Lat: 34 56.9408 Long: -11 55.3521 depth: 791.8 m cable: 1737 m

Working Lat: 34 56.9285' Long: -11 55.4156' depth: 783.9 m cable: 1631 m

Working Lat: 34 56.9215' Long: -11 55.3430' depth:784.6 m cable: 1498 m

Working Lat: 34 56.9052' Long: -11 55.4663' depth:782.2 m cable: 1158 m

Seabottom Lat: 34 56.8779' Long: -11 55.6029' depth:790.4 m cable: 861 m

Ending Lat: 34 57.0204' Long: -11 55.8870' depth: 725. m

Recovery: bioclastic sand with corals, pteropods, and fragments of bio-calcarenites and a small piece of volcanic rock (?)

Site SWIM04-29 (Dredge) (red arrow on Fig.16)

Starting Lat: 34 58.3106' Long: -11 57.3238' depth:1011.8 m

Seabottom Lat: 34 57.9640' Long: -11 57.3454' Prof:1017 m Cable: 1215 m

Lavora Lat: 34 57.3766' Long: -11 57.3229' Prof: 821.2 m Cable: 1959 m

Lavora Lat: 34 57.3181 Long: -11 57.3255' Prof: 806.3 m Cable: 1853 m

Lavora Lat: 34 57.2304' Long: -11 57.3502' Prof: 792.9 m Cable: 1757m

Lascia il Fondo Lat: 34 56.8458' Long: -11 57.2962' Prof: 742.7 m Cable: 777 m

Bordo Lat: 34 56.7734' Long: -11 57.1400' Prof: 723.8 m

Recovery: ocraceous mud with small fragments of recent brown limestones; several fragments of altered red basaltic rocks and a large metric fragment of pillow lava basalts with interbedded pelagic limestones.

Samples:

Sample 1: metric fragment of pillow basalts with interbedded light brown consolidated pelagic sediments; 100x70x50 (Fig 17 a,b).

Sample 2: altered reddish basaltic lava flow 22x10x7 cm

Campione3: altered reddish basaltic lava flow10x7x5 cm

Campione 4: altered reddish basaltic lava flow12x10x5 cm

Campione 5: 2 small altered reddish basaltic lava flow

Campione 6: rounded black pebble. Gabbro (?) 3x2x1

Campione 7: scoriaceous fragments

Campione 8: recent brown limetones

Site SWIM04- 29b (deep water recovery)

Lat: 34 57.0959 Long -11 57.2846 Prof: 745.8

Fig. 17 a,b

6 Settembre 2004

Working area on the Ormonde Bank of the Gorringe Ridge (fig.18)

Site SWIM04-30 (Grab) (light blue square on Fig.18)

Seabottom Lat: 36 47.0637' Long: -11 03.0746' depth: 607.3 m

Recovery: bioclastic sand

Fig. 18

Site SWIM04-31 (Grab) (ligth blue square on Fig.18)

Seabottom Lat: 36 46.3932' Long: -11 03.1073' depth: 452.9 m

Recovery: bioclastic sand

Site SWIM04-32 (Grab) (ligth blue square on Fig.18)

Seabottom Lat: 36 45.7210' Long: -11 03.0424' depth: 316.9 m

Recovery: bioclastic sand with forams and a volcanic fraction. Several centimetric volcanic fragments.

Site SWIM04-33 (Grab) (ligth blue square on Fig.18)

Seabottom Lat: 36 44.9452' Long: -11 03.0220' depth: 170 m

Recovery: bioclastic sand

Site SWIM04-34 (Grab) (ligth blue square on Fig.18)

Al fondo Lat: 36 44.0872' Long: -11 03.0970' depth: 102.8 m

Recovery: decimetric fragment of volcanic rocks (Paleogene alkaline basalts ?)

Site SWIM04-35 (Grab) (ligth blue square on Fig.18)

Seabottom Lat: 36 44.0688' Long: -11 03.0780' depth: 112 m

Recovery: some centimetric fragments of volcanites (Paleogene alkaline basalts ?)

Site SWIM04-36 (10 m Piston Core) (red circle on Fig. 18)

Target Lat: 36 56.0810' Long: -10 44.94398' depth: 2235 m

Starting Lat: 36 56.0615' Long: -10 44.9982' depth: 2239 m

Seabottom Lat: 36 56.0247 Long: -10 45.0427 depth: 2237 m

Ending Lat: 36 55.9868 Long: -10 45.2250 depth: 2212 m

Recovery: 76 cm + 21 cm core catcher of light brown oozes.

Working area next to the Marques de Pombal Structure (Fig.19)

Site SWIM-37 (6 m Gravity Core and SW) (red circle on Fig. 19)

Target Lat: 36 50.2558' Long: -10 08.6600' depth: 3890 m

Starting Lat: 36 50.2625' Long: -10 08.6790' depth: 3895 m

Seabottom Lat: 36 50.2520' Long: -10 08.6678' depth: 3895 m

Ending Lat: 36 50.2380' Long: -10 08.6389' depth: 3895 m

Recovery: SW 100 cm + 2 l of water

Recovery Core: 198 cm + 5 cm core catcher of homogeneous green silty mud.

Fig. 19

7 Settembre 2004

Working area south of Faro across the slope of the southern Portuguese continental margin (Fig.22)

Site SWIM04-38 (10 m Piston Core) (red arrow on Figs.20, 21 and red circle on Fig. 22)

Target Lat: 36 39.627078' Long: -7 42.2406' depth: 760 m

Starting Lat: 36 39.5167' Long: -7 42.2222' depth: 797.7 m

Seabottom Lat: 36 39.5165' Long: -7 42.2226' depth: 797 m Cable: 810 m

Ending Lat: 36 39.5073' Long: -7 42.2226' depth: 797.7 m

Recovery: 310 cm + 11 cm core catcher of very fossiliferous gray silty mud.

Fig. 20

Fig 21

Fig. 22

Site SWIM04-39 (10 m Piston Core) (red circle on Fig.22)

Target Lat: 36 24.31464' Long: -7 40.36204' depth: 760 m

Starting Lat: 36 24.3229' Long: -7 40.3651' depth: 797.2 m

Seabottom Lat: 36 24.3152' Long: -7 40.3824' depth: 798 m Cable: 819 m

Ending Lat: 36 24.3656' Long: -7 40.3920' depth: 799.6 m

Recovery: 55 cm + 15 cm core catcher of light gray semi-consolidated marls.

Coring trouble

Site SWIM04-40 (5 m Piston Core) (red circle on Fig.22 and red arrow on Fig. 23)

Target Lat: 36 35.48918' Long: -7 34.177254' depth: 650 m

Starting Lat: 36 35.4659' Long: -7 34.1596' depth: 636.8.m

Seabottom Lat: 36 35.4786' Long: -7 34.1747' depth: 635 m Cable: 648 m

Ending Lat: 36 35.4560' Long: -7 34.1907' depth: 637 m

Fig. 23

Recovery: 415 cm of light brown fine sand at the bottom; coarser at the top.

8 Settembre 2004

Working area in the central part of the Gulf of Cadiz (Fig.24)

Site SWIM04-41 (5 m Piston Core) (red circle on Fig. 24)

Target Lat: 35 43.0000' Long: -7 05.0000' depth: 1238 m

Starting Lat: 35 42.9969' Long: -7 04.9975' depth: 1234 m

Seabottom Lat: 35 42.9974' Long: -7 05.0058' depth: 1234 m Cable: 1265 m

Ending Lat: 35 43.0115' Long: -7 04.9535' depth: 1234 m

Fig. 24

Recovery: 92 cm of light brown silty mud.

Site SWIM04-42 (SW Core)(blue circle on Fig.24)

Target Lat: 35 53.13' Long: -7 31.67' depth: 1180 m

Starting Lat: 35 53. 1163' Long: -7 31.6723' depth: 1172 m

Seabottom Lat: 35 53.1311' Long: -7 31.6706' Prof: 1172 m Cable: 1190 m

Ending Lat: 35 53.0959' Long: -7 31.6872' Prof: 1169 m

Recovery: 85 cm of light brown Mud.

Site SWIM04-43 (Dredge) ( green circle on Fig. 24)

Starting Lat: 36 06.4490' Long: -7 36.8450' depth: 1170.3 m

Seabottom Lat: 36 06.6078' Long -7 36.60.75' depth: 985 m cable: 1240 m

Working Lat: 36 06.0753' Long: -7 36.2897 depth: 960 m

cable: 1465 m

Seabottom Lat:36 07.0080' Long: -7 36.1194' depth: 924 m cable: 1022 m

Ending Lat:36 07.1270' Long: -7 36.1183' depth: 900 m

Recovery: Several fragments of carbonates “Chimneys” with decimetric to metric sizes and variable shapes. Some of them are covered by grey mud.