Thursday, July 28, 2016

Diamonds of Brazil

In 1725 diamonds were found by placer gold miners in the Abaete and Jequitinhonha Tijuco rivers region of Minas Gerais, Brazil.

The discovery effectively ended India’s 2,600-year diamond monopoly. By the 1740s, the Portuguese government allowed a few plantation owners to work the land for diamonds using slave labor.
In the second half of the 18th century, more diamond discoveries extended Brazil's diamond fields from Diamantia (formerly Tejuco, where the stones were first found) to Bahia in the north, Goyaz in the west, and Matto Grasso in the jungle. In 1818, Brazil's total diamond production stood at 3,240,000 carats.

With independence in 1822 anyone who could afford to pay taxes was allowed to mine for diamonds.
Slavery was legal and slaves did virtually all the actual diamond mining. Production waned in succeeding years and by 2009 only 21,000 carats came from Brazil.

The largest diamond ever found in Brazil was a 254-carat stone, discovered in 1853 in Minas Gerais. The "Star of the South" was found by a slave girl named Rosa in 1853, at the Bagagem River. It was handed over to her master, Casimiro de Moraes, who rewarded her by granting her freedom and a pension for life. The stone was cut into an oval cushion shape weighing 128.48 carats.
The Moussaieff Red Diamond is 5.11 carats with a triangular brilliant cut, rated in color as Fancy Red and it is the world's largest known red diamond.

The Moussaieff Red was discovered in the 1990s by a Brazilian farmer in the Abaetezinho river in 1990, in a region known as Alto Paranaiba.

Ivanhoe Mines Ltd. - IVN.t

Ivanhoe Mines Ltd. - IVN.t formerly Ivanplats Limited, is a mineral exploration and development company with properties located in Africa.

The principal projects are; the Kamoa copper discovery in the DRC, the Platreef discovery on the Bushveld Complex in South Africa, and the Kipushi zinc, copper and germanium project, also in the DRC.

On July 14, 2016 the company released News

Robert Friedland, Executive Chairman of Ivanhoe Mines (TSX: IVN), and Lars-Eric Johansson, Chief Executive Officer, announced today that permanent sinking work has begun on Shaft 1 at the Platreef platinum-group metals, nickel, copper and gold mine in South Africa. Shaft 1, which will have an internal diameter of 7.25 metres, will provide initial access for early underground development at the Flatreef Deposit and will be utilized to fast-track production during the first phase of the project.

Following the successful commissioning and licensing of the required equipment, the permanent sinking phase started at a planned, initial rate of 1.8 metres per day. This is planned to double the current depth of Shaft 1 from 54 metres to 107 metres below surface – the point at which the main sinking phase will begin. Ivanhoe expects that the subsequent main sinking phase will advance at an average rate of 2.7 metres a day until it reaches the planned, final depth at 1,025 metres below surface in 2018.

“This is an important milestone in the building of a major, new underground mine at Platreef and we are extremely proud of our employees and contractors for the safe and efficient job they have done in transitioning Shaft 1 from the pre-sinking phase to the permanent-sinking phase,” said Mr. Friedland. Platreef’s Shaft 1 officially licensed for permanent sinking operations.

Wednesday, July 27, 2016

Argentine police arrest meteorite thieves

Police in Argentina have arrested four men who were trying to steal more than a tonne of meteorites in the northern province of Chaco. Highway police say they found more than 200 large pieces of meteorites hidden under the seats of a truck which they had stopped in a random check. Three Argentines and a Paraguayan were arrested.

The province of Chaco is world famous for meteorites, which are protected under Argentine law.
A 37-ton space rock crashed to Earth as part of a meteor shower between 4,000 and 5,000 years ago, forming a giant 1,300 sq km (500 sq miles) kilometer crater field in northeastern Argentina known as Campo del Cielo, or Field of the Sky.

Named El Chaco after the province it fell into, the meteorite is central to the native Moqoit people.
El Chaco was discovered with a metal detector in 1967. It is the second-biggest meteorite ever found.

In 1990 an Argentine highway police officer foiled a plot to steal it for sale to a private US collector.
Campo del Cielo meteorite is classified in Group I, , 6.68% Ni, 0.43% Co, 0.25% P, 87 ppm Ga, 407 ppm Ge, 3.6 ppm Ir. Almost all of the remaining portion of the meteorite is iron.

"Las Víboras" fragment found in Campo del Cielo

Campo del Cielo meteorite, El Chaco fragment

Campo del Cielo meteorite, El Chaco fragment

Victoria Gold Corp - VIT.v

Victoria Gold Corp - VIT.v is advancing the flagship Eagle Gold Deposit on the Dublin Gulch Property in the Yukon.

The Eagle Gold Project has a resource of 4.8 million gold ounces indicated and 1.5 million gold ounces inferred. A PEA suggests +200,000 ounces of gold annually at an operation cost of approximately $600 per ounce.

On July 20, 2016 the company released NEWS

Victoria Gold Corp. (TSX.V-VIT) "Victoria" or the "Company" is pleased to announce Shamrock Zone assay results from the Spring 2016 Olive-Shamrock Exploration Program.

Gold assays from all diamond drill holes of the 2016 Olive-Shamrock program have now been received and released. Previous results released earlier this summer from the Olive Zone included 38.1m at 2.1 g/t Au, 144.5m at 1.2 g/t, 73.8m at 1.6 g/t gold and 167.5m at 0.92 g/t including 30.1m at 2.85 g/t gold.