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Tag: Mineral Researches

Microplastics of 2mm. Credit: NIOZ

Sunlight pulps the plastic soup

Earth, core, mantle

Researchers discover previously unknown mineralogy of the deep Earth

Using Mössbauer spectroscopy, Osaka Metropolitan University scientists investigate the iron ion status of pyroxenes, a major group of rock-forming silicate minerals. Their study revealed that in pyroxene crystals consisting of roughly 50% calcium, the tensor that determines the ratios of iron ions at the Mössbauer spectral peaks is independent of the iron content but dependent on the calcium content. Credit: Shinoda, OMU

Calcium content determines the peak intensity ratio due to iron ions...

A depiction of an asteroid heading toward Earth, with the moon in the background. (Image credit: Juan Gartner via Getty Images)

The largest meteorite impacts on Earth

The diamond from Botswana revealed to the scientists that considerable amounts of water are stored in the rock at a depth of more than 600 kilometres. Photo: Tingting Gu, Gemological Institute of America, New York, NY, USA

An ocean inside Earth? Water hundreds of kilometers down

A selection of some of the rare earth artificial rocks produced by the team. Picture taken at the iCRAG Lab at Trinity College Dublin. Credit: Trinity College Dublin

Researchers create synthetic rocks to better understand how increasingly sought-after rare...

The iron-carbon alloy reacted with water at high pressure and high temperature conditions related to the Earth’s deep mantle in a diamond-anvil cell.

Diamonds and rust at Earth’s core-mantle boundary

An anaerobic, motile, gram-positive bacterium adheres to the molybdenite (MoS2) surface to uptake the trace elements from the mineral structure for cell synthesis. Credit: Science China Press

Mineral-microbe interactions play important roles in geological and environmental processes

Thin section of NASA sample, LAP 02436, Lunar Mare Basalt containing indigenous noble gases. Image type: optical microscopy, cross-​polarized light. (Image: ETH Zurich / Patrizia Will)

One more clue to the Moon’s origin

Examining ocean floors key to minerals needed for renewable energy. Image: Supplied

Ancient ocean floors could help in the search for critical minerals

Kimberlites are complex rocks that came to the Earth's surface from great depths. The picture shows a thin section of a carbonate-​rich kimberlite. (Photograph: David Swart / Messengers of the Mantle Exhibition)

Traces of life in the Earth’s deep mantle

Minerals are visible in rock samples from the coast of Oman. Scientists said these rocks may reveal new information about subduction, an important tectonic process on Earth. Credit: Joshua Garber / Penn State.

Mineral dating reveals new clues about important tectonic process

Can diamonds originate methane?

Igánâq, Greenland: view to the southwest from the Igánâq summit (~540m) towards Tunulliarfik and the snowy peaks of Ilímaussaq. Credit: University of St Andrews

New tools to unearth rare metals

Some of the world’s oldest rubies linked to early life

Gold in pyrite

‘Fool’s gold’ not so foolish after all

Zircons studied by the research team, photographed using cathodoluminescence, a technique that allowed the team to visualize the interiors of the crystals using a specialized scanning electron microscope. Dark circles on the zircons are the cavities left by the laser that was used to analyze the age and chemistry of the zircons.Scientists led by Michael Ackerson, a research geologist at the Smithsonian's National Museum of Natural History, provide new evidence that modern plate tectonics, a defining feature of Earth and its unique ability to support life, emerged roughly 3.6 billion years ago. The study, published May 14 in the journal Geochemical Perspective Letters, uses zircons, the oldest minerals ever found on Earth, to peer back into the planet's ancient past.The team tested more than 3,500 zircons, each just a couple of human hairs wide, by blasting them with a laser and then measuring their chemical composition with a mass spectrometer. These tests revealed the age and underlying chemistry of each zircon. Of the thousands tested, about 200 were fit for study due to the ravages of the billions of years these minerals endured since their creation. Credit: Michael Ackerson, Smithsonian.

Earth’s oldest minerals date onset of plate tectonics to 3.6 billion...

McGill Colloidal Au research team study a mineralized (gold-bearing) vein underground at the Brucejack mine. Credit: Duncan McLeish

Clues from soured milk reveal how gold veins form

The research potentially has wide implications for the materials sector and industry. Credit: Monash University

Rare earth unlocks copper, gold and silver secrets

Scientists and philosopher team up, propose a new way to categorize...

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