Ann: MINE: CRP: Chatham Rock Phosphate to apply f

• Release Date: 20/04/12 15:12
• Summary: MINE: CRP: Chatham Rock Phosphate to apply for mining licence
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CRP
20/04/2012 13:12
MINE

REL: 1312 HRS Chatham Rock Phosphate Limited

MINE: CRP: Chatham Rock Phosphate to apply for mining licence

CRP to apply for mining licence this year, after wealth of data gathering

Chatham Rock Phosphate (CRP) plans to apply for a mining licence in June and
a marine consent in September after gathering a wealth of information during
48 days surveying on the Chatham Rise this summer.

The information, targeted at the Rise's significant phosphate resource, also
contributes significantly to the store of public good information used by
scientists to understand New Zealand's oceanic environment.

The 100 m Dorado Discovery, based in New Zealand since December has conducted
four research surveys for CRP, using a range of high tech equipment. The
surveys collected geophysical data in December, bottom samples in February,
environmental data in March and geotechnical data in April. CRP's last cruise
ended today and the mammoth job of resource modelling, environmental
assessment and geotechnical analysis now begins.

CRP chief executive Chris Castle said the trips have generated a massive
amount of data.  "Following the four trips to Chatham Rise, there is now
available a wealth of geophysical data and remote operated vehicle (ROV)
observations, as well as a great variety of sea floor samples including box
cores, vibrocores and grab samples.

"Based on geophysical and environmental data, CRP will be able to tie it all
together and optimise the mining efforts. The project has all it needs to
move forward."

Mr Castle paid tribute to the work done by the project team, and the
scientists, engineers and other technical staff gathered from the United
States, Netherlands, Germany and New Zealand who worked under immense time
pressure. "Our team put together these trips in just a few weeks; it normally
takes months or even years."

"Our focus now is on undertaking the necessary analysis and preparing the
reports required for the two key consents we need," Mr Castle said.  "We plan
to begin production in 2014."

The data and samples acquired by the four cruises will be used for:

o The application for the mining licence
o The environmental impact assessment report required to accompany the
application for a marine (environmental) consent
o Refinement of the design of the phosphate recovery and on-board separation
systems
o Acceleration of the rock phosphate beneficiation studies presently under
way
o Further design work in respect of the on-board glauconite separation
systems
o New fertiliser market development.
"The project continues to maintain considerable momentum.  We have a strong
focus on setting objectives and achieving ongoing milestones.  We have met
all our key deadlines so far and we are determined to keep delivering on our
goals."

Boskalis project leader Gerard Van Raalte said the data gathering this summer
is invaluable for designing the undersea and onboard extraction equipment and
separation techniques.

"We are also results orientated and so we are working very well with the CRP
team."

December cruise:
The survey mapped 715 km2 of the sea floor with multi-beam swath bathymetry
(seafloor topography) data and 199 km2 with side-scan sonar data. It
collected 263 km of sub-bottom seismic reflection data and magnetic data.
The survey collected information about the shape and character of the sea
floor and the properties of the shallow sediments that will help understand
the distribution of the phosphate resource. The data guided planning for
subsequent surveys, assisted the development of mining technology and
strategy, and contributed to the identification of priority areas for the
first few years of mining. The ship recovered two oceanographic moorings that
had collected current and turbidity data, now downloaded for processing and
analysis.

The new detailed bathymetry data show the irregularity is primarily the
result of underlying geology and iceberg scours up 15 m deep, 400 m wide and
tens of km long. The data obtained are valuable for the detailed design of
the dredging operations.

February cruise:
The survey collected 50 precisely located grab samples, bringing more that 35
tonnes of sediment back to analyse nodule content and distribution and test
separation techniques. The bulk sediment also brought in considerable
environmental data that contributed to the March environmental survey. The
project team conducted four ROV dives (the first ever on the Chatham Rise) to
inspect the sea floor before and after grab sampling and to test the physical
properties of the sediment, as well as expanding the geophysical mapping of
the sea floor.

March cruise:
The team surveyed 13 of the environmental areas identified by NIWA (eight
target mining areas and five reference areas outside mining zones) and
collected more than 77 km of ROV video transects, recording more than 150
hours (or 700 Gb) of video and 62,000 observations from the video transects
as well as 17,000 still photos.  In addition, the cruise collected 130 box
cores from 38 sites, 3 km2 of high-resolution bathymetry and backscatter data
and more than 500 km2 of regional bathymetry data.  The ROV stopped on 12
occasions to take biology samples or close-up photos.  The sampling and
photography will enable detailed assessment of animals that live on the
seafloor.

April cruise:
The cruise, with Boskalis engineers on board, involved the first
investigation that specifically focused on properties of the seafloor as they
relate to design and construction of a mining machine. Four ROV dives tested
the geotechnical properties of the sand and chalk, including how hydraulic
jets could loosen the sediment without creating high turbidity before the
phosphate and associated sediment can be pumped on board for separation. Cone
Penetration Test (CPT) measurements were done at 129 sites, collecting
information about sediment strength, hardness, friction and porewater
pressure. Fifteen short vibrocores returned 12.6 m of sediment. A vibrocorer
uses vibration to work the core tube into the seabed as distinct to a corer
that relies on gravity alone for penetration into the sediments.  The cruise
took four box core samples for environmental and geotechnical analysis.

Chris Castle 021 55 81 85 or [email protected]
End CA:00222064 For:CRP    Type:MINE       Time:2012-04-20 13:12:33