| 单词 | kimberlite |
| 例句 | Lots of carbon comes up with kimberlite ejecta, but most is vaporized or turns to graphite. A Short History of Nearly Everything 2003-05-06T00:00:00Z We also know a little bit about the mantle from what are known as kimberlite pipes, where diamonds are formed. A Short History of Nearly Everything 2003-05-06T00:00:00Z A kimberlite pipe could explode in your backyard as you read this. A Short History of Nearly Everything 2003-05-06T00:00:00Z The researchers tested this in the lab, introducing kimberlite to soil microbes and watching how they changed in number and species. Biological fingerprints in soil show where diamond-containing ore is buried 2023-10-24T04:00:00Z They found that over the last 500 million years, there is a pattern where the plates start to pull apart, then 22 million to 30 million years later, kimberlite eruptions peak. Fountains of Diamonds Erupt as Supercontinents Break Up 2023-08-21T04:00:00Z A new study offers clues to the mysteries of kimberlite eruptions, the source of most of the diamonds mined on Earth today. Your Thursday Briefing 2023-07-27T04:00:00Z One idea posits that the deep plumes of rising, hot mantle that may drive continental breakup could also fuel kimberlite formation. When Ancient Eruptions Pumped Diamonds to Earth’s Surface 2023-07-26T04:00:00Z As a result, kimberlite eruptive material is representative of mantle compositions: it is ultramafic. Physical Geology 2015-01-01T00:00:00Z Using these 'indicator' microbes and their DNA sequences, the team tested the surface soil at an exploration site in the Northwest Territories where kimberlite had previously been confirmed through drilling. Biological fingerprints in soil show where diamond-containing ore is buried 2023-10-24T04:00:00Z Interestingly, these kimberlite eruptions seemed to start at the edges of the rifts and then marched steadily toward the center of the land masses. Fountains of Diamonds Erupt as Supercontinents Break Up 2023-08-21T04:00:00Z An unusual magmatic process is a kimberlite pipe, which is a volcanic conduit that transports ultramafic magma from depths in the mantle to the surface. An Introduction to Geology 2017-01-01T00:00:00Z To solve this mystery, Dr. Gernon and his team analyzed statistical correlations between continental breakups and kimberlite blasts during the last billion years. When Ancient Eruptions Pumped Diamonds to Earth’s Surface 2023-07-26T04:00:00Z There have been no kimberlite eruptions in historic times. Physical Geology 2015-01-01T00:00:00Z Researchers have identified buried kimberlite, the rocky home of diamonds, by testing the DNA of microbes in the surface soil. Biological fingerprints in soil show where diamond-containing ore is buried 2023-10-24T04:00:00Z This finding matches the real-life pattern seen with kimberlite eruptions starting near rift zones and then moving to continental interiors, the researchers reported July 26 in the journal Nature. Fountains of Diamonds Erupt as Supercontinents Break Up 2023-08-21T04:00:00Z Scientists chanced on the latest evidence as they examined exploration samples of kimberlite, a rock that often contains diamonds, from Baffin Island. Diamond samples reveal size of lost continent 2020-03-21T04:00:00Z That makes it difficult to pin down kimberlite eruptions’ cause, especially because no one has witnessed one of the furious blasts. When Ancient Eruptions Pumped Diamonds to Earth’s Surface 2023-07-26T04:00:00Z These distinctive minerals are used for this type of exploration because they are many times more abundant in kimberlite than diamond is. Physical Geology 2015-01-01T00:00:00Z In future, exploration teams could build up a database of indicator species and test an unknown site to find out if kimberlite deposits are buried beneath the soil. Biological fingerprints in soil show where diamond-containing ore is buried 2023-10-24T04:00:00Z This churns together rock with lots of water and carbon dioxide trapped within it, along with many key kimberlite minerals — including diamonds. Fountains of Diamonds Erupt as Supercontinents Break Up 2023-08-21T04:00:00Z Figure 1 | Cross-section of kimberlite from West Greenland. Enigmatic origin of diamond-bearing rocks revealed 2019-09-24T04:00:00Z To argue against erosion erasing the craters, the researchers pointed to geological features known as kimberlite pipes — carrot-shaped rock formations that form during explosive eruptions. What Happened to Earth’s Ancient Craters? Scientists Seek Clues on the Moon’s Pocked Surface 2019-01-17T05:00:00Z A typical kimberlite in northern Canada may look something like the diagram shown below. Physical Geology 2015-01-01T00:00:00Z The Nyurbinsky open pit mine spirals down for about a thousand feet, circling around a core of ore called a kimberlite pipe. A Diamond Giant Plays Up Its Russian Ties to Appeal to Americans 2018-07-11T04:00:00Z A mining company report suggests that the area could have as many as 14 sites of kimberlite, the rocks known to sometimes contain diamonds. The Cinta Larga and the curse of the diamonds - BBC News 2017-03-24T04:00:00Z By contrast, there is little consensus on the exact location of the kimberlite source in the mantle and, even more crucially, on the nature of this source. Enigmatic origin of diamond-bearing rocks revealed 2019-09-24T04:00:00Z They greet each other in front of the rocky kimberlite mountain that has been created by Koidu Holdings' blasts. One man's search for diamonds - BBC News 2017-01-04T05:00:00Z At that time it was standard practice to break down any kimberlite ore to 30mm before putting it through the sorting machine to test its density and see if it contained any diamonds. Why have so many huge diamonds been found recently? - BBC News 2016-06-29T04:00:00Z Then, last November, the mine’s X-ray machine found a clod of kimberlite that an underground volcanic eruption had shot to the Earth’s surface, like a hundred-and-fifty-pound soccer ball, some ninety million years ago. The Ungraspable Value of the World’s Largest Diamond 2016-06-07T04:00:00Z Researchers recently found kimberlite deposits hinting at the existence of diamonds. Countries Rush for Upper Hand in Antarctica 2015-12-28T05:00:00Z These peculiar characteristics raise questions about the nature of the kimberlite source and its location in the mantle. Enigmatic origin of diamond-bearing rocks revealed 2019-09-24T04:00:00Z A South African company, Koidu Holdings, runs a large mine that uses sophisticated machinery to blast through kimberlite and identify diamond-dense areas in the deep earth. One man's search for diamonds - BBC News 2017-01-04T05:00:00Z Corrections & Amplifications: Only about 15 in 100 kimberlite pipes contains even one diamond. Inside De Beers’s Hunt for Africa’s Elusive Diamonds 2015-10-23T04:00:00Z The palm-like Pandanus candelabrum apparently prefers soil rich in kimberlite — a type of igneous rock that forms in the Earth's crust in huge vertical columns. Rare African plant points the way to diamonds 2015-05-07T04:00:00Z Although many kimberlite eruptions took place relatively recently, the diamonds themselves are ancient: typically about 3 billion years old. Rare African plant signals diamonds beneath the soil 2015-05-04T04:00:00Z There is a general consensus on several aspects of kimberlite formation. Enigmatic origin of diamond-bearing rocks revealed 2019-09-24T04:00:00Z The biggest of the stones weighs 1.3 carats, but potentially of greater importance is the surface area of the biggest kimberlite, measured at 540 acres which is big by world standards. A Small Bet On Diamonds Pays Off Handsomely For John Kahlbetzer 2014-07-10T04:00:00Z A research team led by Prof Graham Pearson of the University of Alberta, Canada, studied a diamond from a 100-million-year-old kimberlite found in Juina, Brazil, as part of a wider project. Hints of deep Earth's blue rocks 2014-03-13T01:16:58Z Haggerty adds that even though the plant's presence indicates that there's kimberlite in the ground, this doesn't guarantee that there'll be diamonds as well. Rare African plant points the way to diamonds 2015-05-07T04:00:00Z He wants to continue analyzing the plant and the kimberlite soil to see exactly how nutrients are exchanged. Rare African plant signals diamonds beneath the soil 2015-05-04T04:00:00Z The case for a primitive kimberlite source is bolstered by the evidence that this source is deep. Enigmatic origin of diamond-bearing rocks revealed 2019-09-24T04:00:00Z Finding diamonds in kimberlite is a breakthrough for the company, but finding enough to justify a mine is the next step. A Small Bet On Diamonds Pays Off Handsomely For John Kahlbetzer 2014-07-10T04:00:00Z A research team led by Professor Graham Pearson of the University of Alberta, Canada, studied a diamond from a 100 million-year-old kimberlite found in Juina, Brazil, as part of a wider project. Hints of deep Earth's blue rocks 2014-03-13T01:16:58Z A violent volcanic eruption called a kimberlite quickly carried this particular diamond from deep in the mantle. Rare Diamond Confirms that Earth's Mantle Holds an Ocean's Worth of Water 2014-03-12T19:58:00Z Kimberlite mines tend to be narrow and vertical, with much smaller footprints than, say, open-pit copper mines, and their effluent—ground-up kimberlite—is benign. Rare African plant signals diamonds beneath the soil 2015-05-04T04:00:00Z Finally, kimberlitic diamonds are plucked from the mantle during ascent, and the information that they provide might be irrelevant in terms of the kimberlite source. Enigmatic origin of diamond-bearing rocks revealed 2019-09-24T04:00:00Z "These rocks represent the first reported occurrence of genuine kimberlite in Antarctica," they wrote of the finds around Mount Meredith in the Prince Charles Mountains. Antarctica may have a new type of ice - diamonds 2013-12-17T16:03:53Z Many diamonds are embedded in a dense volcanic rock called kimberlite, which gets its name from the town of Kimberley, South Africa, where several of the world's first diamond mines were discovered. How a Diamond Is Like a Champagne Cork 2012-01-18T18:00:00Z Deep, deep diamonds Scientists investigated six diamonds from the Juina kimberlite field in Brazil. 'Superdeep' Diamonds Hint at Depth of Carbon Cycle 2011-09-16T17:45:05.187Z To look for diagnostic kimberlite minerals, he used corrugated steel rods to dredge up samples from the swampy soil. Rare African plant signals diamonds beneath the soil 2015-05-04T04:00:00Z Diamond has also been reported from kimberlite “pipes” in Rhodesia. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 4 "Diameter" to "Dinarchus" Teal Riley of the British Antarctic Survey said less than 10 percent of deposits of similar kimberlite were economically viable. Antarctica may have a new type of ice - diamonds 2013-12-17T16:03:53Z The lab tests mimic what goes on in the earliest phase of a kimberlite eruption deep inside Earth, the researchers speculate. How a Diamond Is Like a Champagne Cork 2012-01-18T18:00:00Z The yellow ground was already gone, and the equipment was cutting into the blue kimberlite below. The Flaming Mountain In 2013, near an area called Camp Alpha, he discovered a new kimberlite pipe 500 meters long and 50 meters wide. Rare African plant signals diamonds beneath the soil 2015-05-04T04:00:00Z The diamonds at Kimberley are found in a blue earth, technically known as kimberlite and commonly called "blue ground." An African Adventure "This is an excellent paper that really helps fill in some important parts of the kimberlite puzzle," says James Head III, a planetary geologist at Brown University. How a Diamond Is Like a Champagne Cork 2012-01-18T18:00:00Z Also, he adds, the process described by Russell and his colleagues nicely complements a model of kimberlite eruptions that Head and his colleagues set forth early in 2007. How a Diamond Is Like a Champagne Cork 2012-01-18T18:00:00Z In that model, due to dramatic changes in pressure as the kimberlite magma rose, the material became less buoyant and therefore slowed down as it approached Earth's surface. How a Diamond Is Like a Champagne Cork 2012-01-18T18:00:00Z |
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