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发表于 5-11-2008 01:27 AM
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历史请见。。。
http://www.laventa.it/en/naica_crystal_cave.html
In the News ... Giant Crystal Cave's Mystery Solved National Geographic - April 7, 2007
It's "the Sistine Chapel of crystals," says Juan Manuel García- Ruiz.The geologist announced this week that he and a team of researchershave unlocked the mystery of just how the minerals in Mexico's Cueva delos Cristales (Cave of Crystals) achieved their monumental forms.Buried a thousand feet (300 meters) below Naica mountain in theChihuahuan Desert, the cave was discovered by two miners excavating anew tunnel for the Industrias Peñoles company in 2000. To learn how thecrystals grew to such gigantic sizes, García-Ruiz studied tiny pocketsof fluid trapped inside.The cave contains some of the largest natural crystals ever found:translucent gypsum beams measuring up to 36 feet (11 meters) long andweighing up to 55 tons.The crystals, he said, thrived because they weresubmerged in mineral-rich water with a very narrow, stable temperaturerange - around 136 degrees Fahrenheit (58 degrees Celsius). At thistemperature the mineral anhydrite, which was abundant in the water,dissolved into gypsum, a soft mineral that can take the form of thecrystals in the Naica cave.
Giant crystals enjoyed perfection BBC - April 6, 2007
With lengths over 11m, the giant gypsum crystals found in Mexico's Cueva de los Cristales are a great natural wonder
February 8, 2001 - Discovery News
The largest natural crystals on Earth have been discovered in two caves within a silver and zinc mine near Naica, in Chihuahua, Mexico, according to mine officials. Reaching lengths of over 20 feet, the clear, faceted crystals are composed of selenite, a crystalline form of the mineral gypsum. "Walking into either of these caves is like stepping into agigantic geode," said Richard D. Fisher, an American consultant withthe mining company to develop the discoveries as tourist attractions.Fisher said that most people can endure only a few minutes in the cavesdue to their high temperatures. The smaller of the two, which is aboutthe size of two-bedroom apartment, is 100 Fahrenheit. The largechamber, which Fisher describes as the size of a Cathedral, is 150 F.Both are located approximately 1200 feet below the surface. The miningcompany plans to air-condition the caves before opening them to thepublic next year, Fisher said. He adds that reducing the heat graduallywill not harm the crystals.
The largest previously known crystals were found in thenearby "Cave of the Swords", part of the same mine system. Some ofthese are now on display at the Smithsonian Institution. The localgovernment and mine owners hope to avoid removing any of the newdiscoveries for museum displays or private collections, Fisher said.
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发表于 5-11-2008 12:58 AM
发表于 5-11-2008 12:58 AM
有都等我吞了再跟你说
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