Um projecto de prospecção e exploração de diamantes de aluvião levou-me, de novo, a Angola. Estreámos uma nova tecnologia (um drone acabado de comprar; como vivemos até agora sem um?), revimos velhos amigos e fizemos novos conhecimentos, falámos com garimpeiros e ouvimos a chamada muçulmana para as orações às 4 da manhã no Lucapa, experimentámos uma … Continue reading Camissombo – Moquita – Lucapa – Saurimo – Malanje – Luanda: ida e volta
Lucapa Diamond Company Limited (ASX: LOM) just announced the sale of a fourth parcel of diamonds from the Lulo Diamond Concession in Angola for gross proceeds of A$2.9 million as alluvial mining operations at the project continue to ramp up. The sale represented an exceptional average price of A$1,870/carat (US$1,500) for the 1,539 carat parcel, demonstrating … Continue reading LULO (Lucapa Diamond Company) 1,539 ct parcel sold at 1.500 USD/ct
The precambrian Sopa Conglomerate is the source for modern alluvial diamonds deposits in the Diamantina (Minas Gerais) region. This old secondary formation is being reworked by the rivers in the area, releasing the diamonds it stores (themselves originated in primary, still unidentified, sources) into modern alluvia. Both the old conglomerate (Fm. Sopa – Brumadinho – … Continue reading The source of diamonds in the Diamantina (Minas Gerais) region: Fm. Sopa – Brumadinho
Many people and institutions have been involved in the Angolan diamond industry during the last 100 years; places and natural features unknown until then have fallen under the spotlight of the industry. Among those involved, some had a leading role. DIAMANG was the greatest among them; this gallery (in time, a set galleries) honors the … Continue reading DIAMANG: the old times, a new photo gallery
Lucapa Diamond Company Limited (ASX: LOM) recently released some reports containing information (grade and stone size) on the samples recovered in their Lulo concession – our post of December 19 about the scheduled start of the alluvial operations. The releases are detailed but we decided to extract the locations of their reported sampling pits and … Continue reading Alluvial sampling and kimberlite at LUCAPA’s (ASX:LOM) Lulo project
Congo Brazzaville – first trip Pointe Noire to Mayoko and back (february 2013) A short but intense field trip to study the columbo-tantalite deposits in the area. Deep in the dense forest. Friendly people. Nb-Ta and Au alluvial deposits; Nb-Ta pegmatite source. Greenstone belt relic (with iron deposits).