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Topic: Argyle diamond mine

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	Argyle diamond mine at AllExperts
		The Argyle mine is the largest diamond producer in the world by volume, although due to the low proportion of gem-quality diamonds, is not the leader by value.
		The Argyle diamond mine is located in the Kimberley region in the far northeast of the Australian state of Western Australia.
		"The Argyle Mine and Its Diamonds" (adapted from Chapman).
	en.allexperts.com /e/a/ar/argyle_diamond_mine.htm (1623 words)

	Australian Diamonds
		While the predominantly eclogitic diamonds of the Argyle pipe have been dated at an estimated 1,580 million years old, these diamonds were emplaced hydrovolcanically shortly after their formation between 1,100 and 1,200 million years ago.
		Second, of the small percentage of the gem quality diamonds recovered from the Argyle mine about 95 per cent are brown and brownish yellow hued, some 4 per cent are either colourless or grey, and much less than 1 per cent have the very desired pink to red hues.
		It is clear that a significant feature of diamonds from the Argyle pipe is that the majority of them have suffered deformation of their crystal lattice.
	www.gem.org.au /diamond.htm (1398 words)

	Argyle diamond mine - Wikipedia, the free encyclopedia
		A significant quantity of diamonds are cut in India, where low costs of labor allow small diamonds to be cut for a profit; this is especially relevant to the Argyle mine, which on average produces smaller rough diamonds than other mines do.
		Only 5% of mined diamonds are of gem quality, compared to a worldwide average of 20%; of the remaining 95%, they are about evenly split between classifications of "near gem quality" and industrial grade.
		The estimated value of Argyle diamond production is only 7 USD per carat ($35/g); this compares to values of 70 USD per carat ($350/g) for diamonds produced at the Diavik mine in Canada, and 170 USD per carat ($850/g) at the Ekati mine (also in Canada).
	www.knowledgehunter.info /wiki/Argyle_diamond_mine (1660 words)

	Cost of Argyle diamond to increase by 15%, Argyle to Continue Mining Operations, Argyle diamond mine, Rio Tinto ... (Site not responding. Last check: 2007-10-20)
		Argyle will be spending some $900 million to move to the underground mining operations with production dropping to about 60% of the current 34 million carats per year.
		The Argyle mine provides about 17% of the world volume of diamonds but most of the diamonds are smaller, near gem quality and often brown in color.
		Colored diamond lovers worldwide are glad to hear the Argyle is continuing operations because the Argyle mine is the leading producer of colored diamonds, especially the celebrated pink colors.
	www.diamondworld.net /newsroom/print.asp?newsid=315 (255 words)

	: Diamond Source of Virginia Loose Diamonds Education
		Of all the diamonds mined in the world each year, less than half are gem quality; the rest fall into two other main categories known as near-gem quality and industrial quality diamonds.
		Millions of years ago, at the time the diamond pipes were formed, some diamonds were weathered out of the pipes and carried great distances along rivers and even into oceans.
		The grease in the pot is melted and the diamonds are removed in a strainer.
	www.diamondsourceva.com /Education/DiamondIndustry/diamonds-diamond-mining.asp (830 words)

	The Australian Diamond Industry
		The Argyle diamond story has its origins in the early 1970s, when one of the world's most significant find of diamonds was made at Smoke Creek in the remote north of Western Australia, over 2000 kilometres from Perth, the state capital.
		The Argyle diamond pipe is a linear body, 1600 metres along and varying in width from 150 to 600 metres.
		In addition to being the world's biggest diamond producer and only reliable supply of intense pink diamonds, the Argyle diamond mine is unique in a third way: the diamonds are recovered from a host rock call lamproite, not kimberlite which is the traditional host.
	www.costellos.com.au /diamonds/industry.html (1251 words)

	Argyle Diamond Pipe, Western Australia
		The Argyle diamond pipe is in a small valley at the southend of the Matsu Range.
		Diamond exploration in the Kimberley and the difficulty in determining the grade of ore in diamond pipes are described by Grant Boxer.
		Diamonds in Crater of Diamonds, Arkansas are hosted in lamproite but the diamond content (0.5 carat per 100 tons) is not economical for mining.
	volcano.und.edu /vwdocs/volc_images/australia/argyle/argyle.html (773 words)

	Rio Tinto Diamonds \| History of Argyle Mine, Rio Tinto and Diamonds \| About Rio Tinto Diamonds (Site not responding. Last check: 2007-10-20)
		CRA introduced a number of specific exploration objectives, including finding a diamond that was larger than a quarter of a carat, then to find a diamond-bearing pipe and finally a diamond-bearing pipe with a diamond grade high enough to justify a mine.
		Alluvial mining commenced at Smoke Creek in 1983, and the construction of the nearby Argyle mine began in 1984.
		Argyle Diamonds was named after Lake Argyle, which lies to the north of the site.
	www.riotintodiamonds.com /about/diamonds/default.asp (380 words)

	Reference.com/Encyclopedia/Argyle diamond mine
		The Argyle diamond mine is a diamond mine located in the north-east of Western Australia.
		Most Argyle diamonds are classified as type 1a (see material properties of diamond), and have low levels of nitrogen impurities, their colour resulting instead from structural defects of the crystal lattice.
		The estimated value of Argyle diamond production is only 7 USD per carat ($35/g); this compares to values of 70 USD per carat ($350/g) for diamonds produced at the Diavik mine in Canada, and 170 USD per carat ($850/g) at the Ekati mine (also in Canada).
	www.reference.com /browse/wiki/Argyle_diamond_mine (1665 words)

	Argyle Diamond Mine
		The Argyle Diamond Mine is one of the world's most successful diamond mining operations and is located 110km south of Kununurra in the East Kimberley.
		Argyle is the world's primary source of rare pink diamonds, which have become the company's signature stone.
		Argyle commenced its mining it's main ore body in 1985, and has since produced more than 500 million carats of diamonds, ranging from gem quality to near gem and industrial diamonds.
	www.slingair.com.au /kimberley/adm.htm (131 words)

	Australia Diamond Mines \| Argyle Diamond Mine
		The Argyle mine is the largest raw diamond producer in the world, but a low percentage of its yield (around 5%) is gem-quality.
		The mine produces 80% brown diamonds, 16% yellow diamonds, 2% white diamonds, and the remaining 1% are pink or green.
		Argyle diamonds fluoresce blue or green under ultraviolet light and the most common inclusions are graphite, crystalline orange garnet, pyroxene, and/or olivine.
	www.khulsey.com /jewelry/kh_jewelry_diamond_mines_australia.html (385 words)

	Bryson Burke Diamond Corporation: Diamond Exploration and Mining in Canada
		CRA introduced a number of specific exploration objectives, including finding a diamond that was larger than a quarter of a carat, then to find a diamond-bearing pipe and finally a diamond-bearing pipe with a diamond grade high enough to justify a mine.
		Alluvial mining commenced at Smoke Creek in 1983, and the construction of the nearby Argyle mine began in 1984.
		Argyle Diamonds was named after Lake Argyle, which lies to the north of the site.
	brysonburke.com /argyle_geology4.html (613 words)

	Kununurra and Bungle Bungles - Land Log 15 (Site not responding. Last check: 2007-10-20)
		Argyle Diamond Administration ensure their employees have an adequate exercise regime by installing a 14 km jogging track between the staff quarters and the mine.
		Diamonds were first discovered in Smoke Creek in 1979 and traced along the creek bed to the diamond source.
		Argyle is focused on delivering long term benefits from its operation to the people of the east Kimberley - in neighbouring Aboriginal communities and towns Kununurra, Wyndham and Halls Creek.
	www.users.bigpond.com /billyboytwo/Logs/Log15.htm (1796 words)

	Conquest Mining Ltd (CQT on ASX). (Site not responding. Last check: 2007-10-20)
		In 2000, 28 bulk samples of alluvial gravels taken from 18 sites south of the Argyle Mine and along the Bow River were processed in the HMS111 plant with final diamond recovery in Astro's diamond laboratory in Perth.
		Diamonds were recovered at all 18 sites, confirming that the Bow River was form part of the palaeo-drainage system of the Argyle Pipe, but grades recovered were sub-economic and more work is required to identify diamond trap-sites that may result in economic alluvial diamond placers.
		Astro Mining NL flew a high-resolution aeromagnetic survey over the area in January 2001 to detect signs of lamproite pipes, similar to the diamondiferous Argyle Pipe.
	www.mine.mn /Placer_Stockfile_Conquest_Mining.htm (525 words)

	ASTER Image Gallery: Argyle Diamond Mine, Australia
		The Argyle open-pit diamond mine, located in the Kimberley region in the far north east of Western Australia, is the world's largest single producer of diamonds.
		The discovery of the Argyle orebody marked the first time that a commercial diamond occurrence had been identified that is not hosted in kimberlite.
		Argyle also produces between 90% and 95% of the world's pink diamonds.
	asterweb.jpl.nasa.gov /content/02_gallery/gallery.htm@name=Argyle (176 words)

	argyle - Search Results - MSN Encarta
		Argyle, Lake, freshwater reservoir in Australia, one of the country's largest artificially created lakes, located in the far northeastern part of...
		Australia is the world’s largest producer of both gem or near-gem and industrial-grade diamonds, producing about two-fifths of the global total....
		- with diamond pattern: knitted with a pattern of colored diamond shapes
	ca.encarta.msn.com /argyle.html (91 words)

	The Argyle Diamond Mine
		The Argyle Diamond mine, located in the East Kimberley region of Western Australia, is the largest producer of diamonds in the world by volume.
		Diamonds were first found in the Argyle mine region in the 70’s.
		The mine is located in a remote area and has living quarters for the employees who typically work in two week alternating shifts.
	www.thediamondblog.org /diamond-mines/the-argyle-diamond-mine.htm (298 words)

	Rio Tinto \| Minerals and Metals for the world \| Community & Environment
		Argyle instituted weeklong assessment workshops, which provided the opportunity for groups of around 20 applicants to see what it is like to live and work on a mine.
		For jobs where proficiency in using machinery is required, Argyle has set up a small quarry - and, with the aid of an instructor, applicants are guided through a range of exercises using the machinery to determine their aptitude for advanced machinery operation training.
		Argyle's target is to achieve 30 per cent local indigenous employment by 2005.
	www.riotinto.com /library/microsites/socEnv2003/casestud/139_argyle.htm (673 words)

	Argyle Diamond Pipe, Western Australia
		The Argyle diamond pipe is in a small valley at the southend of the Matsu Range.
		Diamond exploration in the Kimberley and the difficulty in determining the grade of ore in diamond pipes are described by Grant Boxer.
		Diamonds in Crater of Diamonds, Arkansas are hosted in lamproite but the diamond content (0.5 carat per 100 tons) is not economical for mining.
	volcano.und.nodak.edu /vwdocs/volc_images/australia/argyle/argyle.html (773 words)

	Sustainability in Western Australia - Case studies
		Diamonds are usually found in kimberlite 'pipes' that have extruded and cooled rapidly during a volcanic event.
		Thus, plans have changed to enable diamonds to be mined for a further six years, while creating the time needed to assess the added possibility of extending the life of the mine further through underground operations.
		With 10% indigenous representation at present, Argyle is aiming to increase this to reflect Kimberley demographics at 15%, as part of an overarching local employment scheme that has a goal of 30% local employment by 2005.
	www.sustainability.dpc.wa.gov.au /CaseStudies/Argyle/Argyle.htm (3396 words)

	Argyle cuts in on diamond monopoly - theage.com.au
		Many of the gem-quality diamonds from Argyle are under one carat, so it is to India that they are sent.
		Many Argyle diamonds are also processed in nearby Ahmedabad, a noisy and chaotic city also known for its dust.
		The international diamond trade works on secrecy, trust and strong cross-border connections, all necessary for the security that is needed for handling small but valuable consignments.
	www.theage.com.au /articles/2002/05/15/1021415010050.html (889 words)

	MiningNews.net - Making diamonds from the rough
		McLeish insists the decision to have a predominantly local workforce at Argyle is not driven by the State Government's royalty concessions, but in fact comes as a potential answer to the skills shortage and from Rio's commitment to the Kimberley.
		On a recent visit to Argyle jointly hosted by the WA Chamber of Minerals and Energy and the Minerals Council of Australia, MiningNews.net spoke to a number of indigenous workers at the diamond mine.
		Argyle executives were reluctant to comment on the amount of money being spent on indigenous training programs at Argyle, but confirmed it tops $1 million annually.
	www.miningnews.net /storyview.asp?storyid=66918 (860 words)

	Israel Trade Commission
		Diamonds have been sought after, fought over and even worshiped, so it is appropriate they have become the ultimate gift of love.
		Australian Argyle Diamonds are internationally renowned for their unique brilliance and stunning array of colours.
		The remaining 5 per cent is made up of gem quality diamonds and includes the rare and highly valued pink diamonds, as well as a range of sparkling champagne and rich cognac diamonds.
	www.israeltrade.org.au /diamondinfo.htm (655 words)

	Percy Marks - Argyle Diamonds (Site not responding. Last check: 2007-10-20)
		Richly coloured stones perfectly complimented by the warmth of gold and highlighted by the stark contrast of brilliant white diamonds.
		The unique mix of geological and geographical conditions also created the only source of the exquisite pink diamonds, so rare that for the millions of carats of Argyle rough diamonds released from their dusty tomb only 0.1% are the coveted pink hue making them the rarest of all diamonds.
		As an Argyle Panel Member Percy Marks is one of a select group of Australian jewellers able to source stones directly from the mine and offer an extensive collection of both champagne and pink diamonds in store.
	www.percymarks.com.au /diamonds/argyle_diamonds (238 words)

	Pink diamonds are a fancy colored diamond
		Prior to the discovery in 1985 of pink diamonds from the Argyle mine in Australia, most of the pink diamonds came from India and were light and pastel in color.
		The diamond was graded by the GIA as fancy light pink VS2.
		About 5% of pink diamonds come from India, Brazil, and South Africa, but the vast majority is sourced from the Argyle Diamond Mine in Western Australia, the world's foremost source of unrivalled intense pink diamonds, producing 95% of the world's supply.
	www.jeweler.com /pink_diamonds.htm (610 words)

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