Rose Petroleum plc

Sampling Confirms High Grade Copper Mineralisation at Choix Prospect


VANE Minerals Plc ("VANE" or "the Company") today announces the confirmation of
exposed copper mineralisation at its Choix Prospect, Sinaloa, Mexico. This
mineralisation was found in rock chip samples which were taken in September

A total of 34 samples were collected at surface from three near-parallel, NE-SW
trending zones. 22 of those samples were collected from the "South Zone", a
cluster of outcrops about 250 metres long and varying from 50 to 80 metres in
width. Seven samples were collected from the "Middle Zone" which is located
about 200 metres north of the South Zone and which outcrops over an area of 150
by 30 metres. Only three samples were taken from the poorly-exposed "North
Zone" which is located about 280 metres further north of the Middle Zone.

From the samples collected by VANE, total copper values from 32 of the 34
samples range from 0.56% to 3.23% Cu at an average grade of 1.85%. Values of
acid-soluble copper in those 32 samples average 1.67%, indicating that 90% of
the copper should be recoverable by leaching. Initial indications are that the
project offers great potential for an open pit leachable high grade copper

Original data on the property, taken by Cambior Exploration SA de CV in July
1996, showed that 80 surface samples had been collected over an area measuring
600 metres by 500 metres. These were assayed for copper, gold, silver, lead and
zinc. Copper values over 1.0% were obtained in 25 samples, while values between
0.5% and 1.0% copper were found in an additional 17 samples.

With the sampling now complete, VANE expects its first round of drilling at the
project to commence in December or as soon as the equipment can be mobilised.

Michael Spriggs, Chairman of VANE, commented: "We are very encouraged by the
initial samples taken from the Choix property and look forward to drilling the
property in order to ascertain the vertical extent of copper mineralisation. We
are confident that this project will add further significant value to VANE's

VANE's ex Freeport McMoran exploration team have a significant history of
identifying extensive copper prospects. Steven Van Nort has 19 years' experience
working at Hanna Mining in world-wide nickel laterite and porphyry copper
exploration. L. Clark Arnold worked for 17 years with Lowell Mineral
Exploration, and was jointly responsible for the development and implementation
of a statistically based method of porphyry copper prospecting which eventually
led to two major discoveries: the Santa Cruz deposit in Arizona and the
Escondida mine in Chile. Frank Nelson worked for 23 years as an exploration
geologist for Freeport. During that time he was often involved with porphyry
copper projects and was involved in the discovery of the Ertsberg East orebody
in Papua, Indonesia.

VANE Minerals was founded by the former international exploration team of
Freeport McMoRan Copper & Gold Inc., one of the world's largest producers of
copper and gold. The team negotiated exclusive access to Freeport McMoRan's
global exploration database, made up of 7,000 plus files generated over nearly
100 years of exploration and, following the review of these files, VANE is
ideally placed to capitalise on project acquisition opportunities. The Company
has assembled a highly qualified and experienced management team with a proven
track record in exploration and development, who have spent their entire careers
searching for and defining large scale mineral deposits.

The Company's principal objective, as set out at the time of its listing in June
2004, is to be a self-funding exploration company. As such, the initial focus
has been to identify high grade gold-silver projects which can be brought into
production as quickly as possible in order to provide revenue towards funding
the development of potentially much larger projects. VANE is well on its way to
achieving this objective as commercial production began at the Diablito mine in
Mexico in November 2005. The Company will use the revenue generated by this
first producing mine to help fund development work across its attractive
portfolio of gold, silver, copper and uranium assets in Mexico, Paraguay and the