SEAM MINERALS · LATERITE MN OPERATIONS · SEMI-ARID BASIN
Proven
Reserves.
Delivered.
Battery-grade and steel-grade manganese processed at mine gate. Open-pit laterite extraction with full JORC 2012 resource classification and quarterly reserve updates.
PROVEN RESERVES
UPDATED Q1 2026
247.3
MILLION TONNES
38.4%
AVG MN GRADE
18.2 Mt
ANN. CAPACITY
34 yr
MINE LIFE
JORC
2012 COMPLIANT
MEASURED
142.1 Mt
INDICATED
105.2 Mt
JURISDICTIONWESTERN AUSTRALIA
DEPOSIT TYPELATERITE / SUPERGENE
PROCESSINGHYDROMET + HPMS
PRODUCTSMnSO₄ · EMD · SiMn
LOGISTICSMINE GATE → PORT HEDLAND
CERTIFICATIONISO 9001 · ISO 14001
SECTION 01 · ORE INTELLIGENCE
Grade Distribution
& Deposit Profile
MN GRADE DISTRIBUTION HISTOGRAM
Total Resource: 247.3 Mt · JORC 2012
DRILLHOLE DATABASE: 2,847 INTERVALS
BATTERY-GRADE RESOURCE
146.8 Mt
≥38% Mn · MEASURED + INDICATED
STEEL-GRADE RESOURCE
87.6 Mt
32–38% Mn · MEASURED + INDICATED
STRIP RATIO
1.4 : 1
WASTE TO ORE · OPEN PIT
PEAK GRADE INTERCEPT
52.3% Mn
SINGLE DRILLHOLE · 18m @ 52.3% Mn
COMPOSITE ELEMENT PROFILE · DEPTH VS GRADE
Average of 847 vertical drillholes · 5m composite intervals
Mn%
Fe%
Al₂O₃%
SiO₂%
SECTION 02 · PRODUCTION & OFFTAKE
Production Tonnage
& Capacity Utilisation
22.5 Mt
FY2025 ORE MINED
9.57 Mt
FY2025 PRODUCT
94.2%
CAPACITY UTIL.
QUARTERLY ORE MINED & PRODUCT SHIPPED
Q1 2023 – Q4 2025 · Million Tonnes
ORE MINED
PRODUCT
TARGET
CURRENT QUARTER PACE
6.2
Mt / quarter
VS TARGET 5.0 Mt+24%
PROCESSING RECOVERY
MnSO₄ RECOVERY
91.4%
EMD RECOVERY
88.2%
SIMN YIELD
94.7%
UPTIME
96.1%
CASH OPERATING COST
US$124
PER TONNE PRODUCT · CIF PORT HEDLAND
MINING$44/t
PROCESSING$62/t
G&A + LOGISTICS$18/t
OFFTAKE CAPACITY VS COMMITTED VOLUME · kt/yr
2026 Annual Contracted Volume by Product Stream
CAPACITY
COMMITTED
AVAILABLE
MnSO₄
(Battery)
360kt
COMMITTED
60kt
AVAILABLE
EMD
(Battery)
120kt
COMMITTED
60kt
AVAILABLE
SiMn
(Steel)
480kt
COMMITTED
160kt
AVAILABLE
HCFeMn
(Steel)
200kt
COMMITTED
120kt
AVAILABLE
SECTION 03 · PRODUCT SPECIFICATIONS
Technical
Data Sheets
BATTERY-GRADE
MnSO₄·H₂O
Manganese Sulphate Monohydrate
MnSO₄·H₂O · LMNO / NMC CATHODE PRECURSOR
END-USE APPLICATIONS
NMC 811 PrecursorNMC 622 PrecursorLMNO CathodeLMO CathodeMn-Rich NMC
CERTIFICATIONS & COMPLIANCE
ISO 9001:2015
REACH Compliant
RoHS Compliant
IATF 16949
CHEMICAL & PHYSICAL SPECIFICATIONS
PARAMETER
TYPICAL VALUE
UNIT
METHOD
Mn Content
31.8
%
MIN 31.5%
Fe Content
≤0.0005
%
ICP-OES
Ca Content
≤0.005
%
ICP-OES
Pb Content
≤0.0002
%
ICP-MS
Ni Content
≤0.001
%
ICP-OES
Co Content
≤0.001
%
ICP-OES
Moisture
≤0.3
%
AT 105°C
D50 Particle Size
80–120
μm
LASER DIFFRACTION
Bulk Density
1.05–1.15
g/cm³
TAPPED
pH (5% Solution)
4.5–6.5
—
AT 25°C
PACKAGING1,000 kg FIBC / 25 kg HDPE BAG
MIN ORDER500 TONNES
INCOTERMFOB PORT HEDLAND / CIF
LEAD TIME6–8 WEEKS EX-STOCK
PRODUCT STREAM OVERVIEW
| PRODUCT | CHEMISTRY | MN% | PURITY | APPLICATION | ANNUAL CAPACITY | AVAILABLE VOL. |
|---|---|---|---|---|---|---|
MnSO₄·H₂O | Battery | 31.8% | 99.5%+ | NMC / LMNO | 420 kt/yr | 60 kt/yr |
EMD | Battery | ≥91.5% | ≥99% | Primary Battery | 180 kt/yr | 60 kt/yr |
SiMn (6517) | Steel | 65–68% | Mill Cert | BOF / EAF | 640 kt/yr | 160 kt/yr |
HCFeMn | Steel | 74–78% | Mill Cert | Alloy Steel | 320 kt/yr | 120 kt/yr |
SECTION 04 · ESG & LOGISTICS
Rehabilitation Metrics
& Pit-to-Port Routing
NDVI REHABILITATION INDEX · DISTURBED VS REHABILITATED AREA
% of Disturbed Area by Status · Annual Survey
ACTIVE DISTURB.
REHABILITATED
NDVI SCALE
BAREDENSE VEG
ESG PERFORMANCE SCORECARD
FY2025 · Self-Assessed + Third-Party Verified
WATER RECYCLED
94%
REHAB RATE
87%
GHG INTENSITY
0.34 tCO₂/t
LOCAL HIRE
78%
LOGISTICS ROUTING · PIT TO PORT HEDLAND BULK TERMINAL
OPEN PIT
SEAM CONCESSION
0 km
→
PRIMARY CRUSH
ON-SITE FACILITY
0.8 km
→
HYDROMET PLANT
MINE GATE PROCESSING
1.2 km
→
PRODUCT STOCKPILE
MINE GATE STORE
1.4 km
→
HAUL ROAD
SEALED MINE ROAD
42 km
→
RAIL SIDING
PILBARA RAIL LINK
220 km
→
PORT HEDLAND
BULK EXPORT TERMINAL
420 km
PARTNERSHIP & OFFTAKE
Request
Offtake Terms
Seam is currently contracting 2026–2030 offtake for battery-grade MnSO₄ and steel-grade SiMn. Annual volume commitments from 500 tonnes to full stream allocation. Incoterm flexible: FOB Port Hedland, CIF, or DDP.
MINIMUM TERM1 YEAR
PRICE REFERENCECIF CHINA + PREMIUM
PAYMENT TERMSLC AT SIGHT / TT 30
FIRST SHIPMENTQ3 2026
DOWNLOAD TECHNICAL DATA SHEET
Full product specifications, assay certificates, and process flow diagrams. No commitment required.
OFFTAKE INQUIRY FORM · CONFIDENTIAL