REGIONAL EXAMINATION
OF SEDIMENTS
International Seabed Authority
Geological Model Project
Final Workshop
Kingston, Jamaica, December 2009
REGIONAL SEDIMENTS
ITEMS FOR DISCUSSION
• OBJECTIVES
• METHODS
• RESULTS
• RELATIONSHIPS TO
ABUNDANCE & METAL
CONTENT
International Seabed Authority
Geological Model Project
Final Workshop
Kingston, Jamaica, December 2009
OBJECTIVES
•ASSEMBLE AVAILABLE DATA FROM
CONTRACTORS & PUBLIC SOURCES
•INTEGRATE DATA INTO COMMON
FORMAT
•EXAMINE RELATIONSHIPS WITH
ABUNDANCE & METAL CONTENT
•GENERATE MAPS FOR POSTER
DISPLAY
International Seabed Authority
Geological Model Project
Final Workshop
Kingston, Jamaica, December 2009
AVAILABLE DATA
Source
File Names
Sed‐stations20‐28.xls Afernod
Sed‐frotis20‐28.xls
COMRA
China sediments type.xls
Depth,nod.abund and sediments(230 stations).xls
IOM
depth,nodtype and sediment(310 stations).xls
NGDC
ArcIMS® ArcView® shape files
shape files
Total
International Seabed Authority
Geological Model Project
Final Workshop
Kingston, Jamaica, December 2009
N
1,750
951
540
1,443
1
443
4,684
AVAILABLE DATA
20N
Clarion Fracture Zone
15N
10N
ne
ctu re Zo
a
r
F
n
o
t
r
Clip pe
110W
115W
120W
W
125W
W
W
130W
135W
W
140W
W
145W
W
150W
W
155W
W
160W
W
5N
Scale: 1:
15,000,000
The n
I ternational
Seabed Authority
Source
AFERNOD
IOM
COMRA
NGDC
Sediment Sample
Stations Used
in the Study
CLASSIFICATION METHOD
Code
Dominant Constituents
Criteria (when available)
1
Ooze, Calcareous
Dominant Biogenic Carbonate
2
Mud, Calcareous
Mud, Calcareous
Mud ≥ 25%; Biogenic Carbonate ≥ 25%
Mud ≥ 25%; Biogenic Carbonate ≥ 25%
3
Ooze, Calcareous, Siliceous
Dominant Biogenic Carbonates & Bio. Silica; Ca>Si
4
Mud, Calcareous, Siliceous
Mud ≥ 25%; Silica ≥ 25%; Carbonate ≥ 25%; Ca>Si
5
Mud, Siliceous, Calcareous
Mud ≥ 25%; Silica ≥ 25%; Carbonate ≥ 25%; Si>Ca
6
Ooze, Siliceous, Calcareous
Dominant Biogenic Silica & Carbonates; Si>Ca
7
Mud, Siliceous
Mud ≥ 25%; Biogenic Silica ≥ 25%
8
Ooze, Siliceous
Dominant Biogenic Silica
9
Mud
Grain size < 0.004 mm
10
Mud, Volcanic
Mud ≥ 25%; Volcanic debris ≥ 25%
11
Silt
Grain size 0.004 mm – 0.063 mm
12
S d
Sand
G i i 0 063
Grain size 0.063 mm –
2 00
2.00 mm
13
Gravel
Grain size > 2.00 mm
14
Large rock or no recovery
International Seabed Authority
Geological Model Project
Final Workshop
Kingston, Jamaica, December 2009
CLASSIFICATION METHOD
Code
Dominant Constituents
Criteria (when available)
1
Ooze, Calcareous
Dominant Biogenic Carbonate
2
Mud, Calcareous
Mud, Calcareous
Mud ≥ 25%; Biogenic Carbonate ≥ 25%
Mud ≥ 25%; Biogenic Carbonate ≥ 25%
3
Ooze, Calcareous, Siliceous
Dominant Biogenic Carbonates & Bio. Silica; Ca>Si
4
Mud, Calcareous, Siliceous
Mud ≥ 25%; Silica ≥ 25%; Carbonate ≥ 25%; Ca>Si
5
Mud, Siliceous, Calcareous
Mud ≥ 25%; Silica ≥ 25%; Carbonate ≥ 25%; Si>Ca
6
Ooze, Siliceous, Calcareous
Dominant Biogenic Silica & Carbonates; Si>Ca
7
Mud, Siliceous
Mud ≥ 25%; Biogenic Silica ≥ 25%
8
Ooze, Siliceous
Dominant Biogenic Silica
9
Mud
Grain size < 0.004 mm
10
Mud, Volcanic
Mud ≥ 25%; Volcanic debris ≥ 25%
11
Silt
Grain size 0.004 mm – 0.063 mm
12
S d
Sand
G i i 0 063
Grain size 0.063 mm –
2 00
2.00 mm
13
Gravel
Grain size > 2.00 mm
14
Large rock or no recovery
International Seabed Authority
Geological Model Project
Final Workshop
Kingston, Jamaica, December 2009
DISTRIBUTION OF SAMPLES
20°
Clarion Fracture Zone
15°
10°
e
ture Zon
c
a
r
F
n
o
Cli ppert
The International
Seabed Authority
Sediment Code
1
5
9
13
2
6
10
14
3
7
11
4
8
12
Code
1
2
3
4
Dominant Constituents
Ooze, Calcareous
Mud, Calcareous
Ooze, Calcareous,Siliceous
Mud, Calcareous,Siliceous
Code
5
6
7
8
Dominant Constituents
Mud, Siliceous,Calcareous
Ooze, Siliceous,Calcareous
Mud, Siliceous
Ooze, Siliceous
Code
9
10
11
12
Dominant Constituents Code Dominant Constituents
13 Gravel
Mud
14 Large rockornorecovery
Mud, Volcanic
Silt
Sand
110° W
120°
130°
140°
150°
160°
5° N
Station Sediment
Classifications
NEAREST NEIGHBOR
EXTRAPOLATION
20°
Clarion Fracture Zone
15°
10°
e
ture Zon
c
a
r
F
n
o
Cli ppert
110° W
120°
130°
140°
150°
160°
5° N
Scale: 1:14,000,000
The n
I ternational
Seabed Authority
Sample
Station
Sediment Code
1
5
9
13
2
6
10
14
3
7
11
4
8
12
Code
1
2
3
4
Dominant Constituents
Ooze, Calcareous
Mud, Calcareous
Ooze, Calcareous, Siliceous
Mud, Calcareous,Siliceous
Code
5
6
7
8
Dominant Constituents
Mud, Siliceous,Calcareous
Ooze, Siliceous, Calcareous
Mud, Siliceous
Ooze, Siliceous
Code Dominant Constituents
9 Mud
10 Mud, Volcanic
11 Silt
12 Sand
Code
13
14
Dominant Constituents
Gravel
Large rockornorecovery
Nearest Station
Sediment
Classifications
CONTOUR OF FINEFINE-GRAINED
SEDIMENTS
20°
Clarion Fracture Zone
15°
10°
ne
cture Zo
a
r
F
n
o
t
Cli pper
110° W
120°
130°
140°
150°
160°
5° N
Scale: 1:14,000,000
The International
Seabed Authority
Sample
Station
Calcareous Ooze
Calcareous, Siliceous Mud
Siliceous Mud
Calcareous Mud
Siliceous, Calcareous Mud
Siliceous Ooze
Calcareous, Siliceous Ooze
Siliceous, Calcareous Ooze
Contoured Sediment
Classificatio ns
3D SEDIMENTS ON BATHYMETRY
Calcareous Ooze
Calcareous, Siliceous Mud
Siliceous Mud
Calcareous Mud
Siliceous, Calcareous Mud
Siliceous Ooze
Calcareous, Siliceous Ooze
Siliceous, Calcareous Ooze
Sediment Type
on
Bathymetry
SEDIMENTS VS NODULES
Nickel
1.35
1.20
0.21
6
7
8
1.00
2
9
3
4
800
Metric tons/km
900
800
700
600
6
7
8
7
8
0.20
2
9
3
8,000
4
5
6
7
8
24
2
9
700
600
500
3
4
5
6
7
Sediment Type
3
Sediment Type
8
9
4
5
6
7
8
9
Sediment Type
20
400
2
9
2
5
Metric tons/km
4
Sediment Type
6
Metric tons/km2
1,000
2
900
3
5
Sediment Type
1 100
1,100
26
2 500
2,500
2
5
Metric tons/km
4
27
25
Sediment Type
Metric tons/km2
Dry Wt. %
1.10
0.22
1.05
3
Manganese
29
28
Dry Wt. %
1.25
500
2
Cobalt
0.23
1.15
Dry Wt. %
Dry Wt. %
1.30
1.15
2
Copper
1.20
15
10
5
2
3
4
5
6
7
Sediment Type
8
9
2,000
1,500
1,000
2
3
4
5
6
7
Sediment Type
8
9
Legend
Nodule Abundance
3.
4
4.
5.
6.
7.
8.
7,000
6,000
Calcareous, Siliceous Ooze
Calcareous
Calcareous, Siliceous Mud
Siliceous, Calcareous Mud
Siliceous, Calcareous Ooze
Siliceous Mud
Siliceous Ooze
5,000
4,000
2
3
4
5
6
7
Sediment Type
8
9
Metal Content & Abundance
vs
Sediment Type
SUMMARY
• SUBSTANTIAL DATA ASSEMBLED
• SOME LIMITATIONS FROM INTEGRATION
• VARIETY OF PRESENTATION GRAPHICS
AVAILABLE
• CONFIRM CLASSIC ASSOCIATION WI TH
BIOSILICA
International Seabed Authority
Geological Model Project
Final Workshop
Kingston, Jamaica, December 2009