The IgarapÃ© Bahia gold deposit has developed from weathering of a near-vertical hydrothermal Cu (Au) mineralization zone. The unweathered bedrock composed of chlorite schists is mainly metamorphosed basalts, pyroclastic and clastic sedimentary rocks and iron formation.
So what exactly is Bitcoin? Bitcoin is a digital currency and digital payment system that allows people to send and receive Bitcoins â or digital tokens â to anyone, anywhere in the world. It runs on a decentralized network of computers in which all transactions are recorded, verified and updated by technology known as blockchain, which is akin to an online public ledger.
Bitcoin is a decentralized cryptocurrency that offers pseudonymity to its users. Although a Bitcoin has no intrinsic value, it's becoming an increasingly popular form of digital currency, attracting venture capitalist attention, from Fred Wilson of Union Square Ventures to the Winklevoss twins. There is a limited supply of Bitcoins, 21 million in total, with 11 million currently in circulation. While Bitcoin allows you to keep your identity concealed, the block chain acts as a public ledger of every Bitcoin transaction.