Mindanao

Mindanao (/mɪndəˈnaʊ/ min-də-NOW) is the second largest and southernmost major island in the Philippines. It is also the name of one of the three island groups in the country (the other two being Luzon and the Visayas), consisting of the island of Mindanao and smaller outlying islands. Davao City is the largest city in Mindanao. As of the 2010 census, the island's population itself is 20,281,545 people, while the Mindanao island group has 21,968,174 inhabitants.

Parts of south-western Mindanao island group, particularly the provinces of Maguindanao, Basilan, Lanao del Sur, Sulu, and Tawi-Tawi (part of the Autonomous Region of Muslim Mindanao (ARMM)), are home to a sizeable Muslim population, making the island group, along with Palawan, the only area of the Philippines with a significant Muslim presence. Due to widespread poverty and religious differences, the island has seen a communist insurgency as well as armed Moro separatist movements.

Mindanao is considered the food basket of the Philippines. Eight of the top 10 agri-commodities exported from the Philippines come from here. Mindanao is also dubbed with the moniker as The Philippines' Land of Promise.

Mineral processing

In the field of extractive metallurgy, mineral processing, also known as ore dressing, is the process of separating commercially valuable minerals from their ores.

History

Before the advent of heavy machinery the raw ore was broken up using hammers wielded by hand, a process called "spalling". Before long, mechanical means were found to achieve this. For instance, stamp mills were used in Samarkand as early as 973. They were also in use in medieval Persia. By the 11th century, stamp mills were in widespread use throughout the medieval Islamic world, from Islamic Spain and North Africa in the west to Central Asia in the east. A later example was the Cornish stamps, consisting of a series of iron hammers mounted in a vertical frame, raised by cams on the shaft of a waterwheel and falling onto the ore under gravity.

The simplest method of separating ore from gangue consists of picking out the individual crystals of each. This is a very tedious process, particularly when the individual particles are small. Another comparatively simple method relies on the various minerals having different densities, causing them to collect in different places: metallic minerals (being heavier) will drop out of suspension more quickly than lighter ones, which will be carried further by a stream of water. The process of panning and sifting for gold uses both of these methods. Various devices known as 'buddles' were used to take advantage of this property. Later, more advanced machines were used such as the Frue vanner, invented in 1874.

Philippines

Coordinates: 13°N 122°E / 13°N 122°E / 13; 122

The Philippines (ⁱ/ˈfɪlᵻpiːnz/; Filipino: Pilipinas [ˌpɪlɪˈpinɐs]), officially known as the Republic of the Philippines (Filipino: Republika ng Pilipinas), is a sovereign island country in Southeast Asia situated in the western Pacific Ocean. It consists of about 7,500 islands that are categorized broadly under three main geographical divisions: Luzon, Visayas, and Mindanao. The capital city of the Philippines is Manila and the most populous city is Quezon City; both are part of Metro Manila.

To the north of the Philippines across the Luzon Strait lies Taiwan; Vietnam sits west across the South China Sea; southwest lies Malaysia in the island of Borneo across the Sulu Sea, and to the south the Celebes Sea separates it from other islands of Indonesia; while to the east it is bounded by the Philippine Sea and the island-nation of Palau. Its location on the Pacific Ring of Fire and close to the equator makes the Philippines prone to earthquakes and typhoons, but also endows it with abundant natural resources and some of the world's greatest biodiversity. At approximately 300,000 square kilometers (115,831 sq mi), the Philippines is the 72nd-largest country in the world.

Gold

Gold is a chemical element with symbol Au (from Latin: aurum) and atomic number 79. In its purest form, it is a bright, slightly reddish yellow, dense, soft, malleable and ductile metal. Chemically, gold is a transition metal and a group 11 element. It is one of the least reactive chemical elements, and is solid under standard conditions. The metal therefore occurs often in free elemental (native) form, as nuggets or grains, in rocks, in veins and in alluvial deposits. It occurs in a solid solution series with the native element silver (as electrum) and also naturally alloyed with copper and palladium. Less commonly, it occurs in minerals as gold compounds, often with tellurium (gold tellurides).

Gold's atomic number of 79 makes it one of the higher atomic number elements that occur naturally in the universe. It is thought to have been produced in supernova nucleosynthesis from the collision of two neutron stars and to have been present in the dust from which the Solar System formed. Because the Earth was molten when it was just formed, almost all of the gold present in the early Earth probably sank into the planetary core. Therefore, most of the gold that is present today in the Earth's crust and mantle is thought to have been delivered to Earth later, by asteroid impacts during the late heavy bombardment, about 4 billion years ago.

Born to Be Wild

"Born to Be Wild" is a song first performed by the band Steppenwolf, written by Mars Bonfire. The song is often invoked in both popular and counter culture to denote a biker appearance or attitude. It is sometimes described as the first heavy metal song, and the second verse lyric "heavy metal thunder" marks the first use of this term in rock music (although not as a description of a musical style).

Composition

"Born to Be Wild" was written by Mars Bonfire (who also wrote several other songs for Steppenwolf) as a ballad. Bonfire was previously a member of the Sparrows, the predecessor band to Steppenwolf, and his brother was Steppenwolf's drummer. Although he initially offered the song to other bands — The Human Expression, for one — "Born to Be Wild" was first recorded in 1967 by Steppenwolf in a sped-up and rearranged version, that AllMusic's Hal Horowitz described as "a roaring anthem of turbo-charged riff rock" and "a timeless radio classic as well as a slice of '60s revolt that at once defines Steppenwolf's sound and provided them with their shot at AM immortality."