Geochemistry – Page 4
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NewsWhat can we learn from asteroids?
Flying space rocks could hold the answer to the origins of life
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ResearchHydrothermal vents generate deep-sea currents
Minerals spewed by ocean vents set up redox reactions that allow electrical currents to flow
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![Simonkolleite [Zn5(OH)8Cl2·H2O] is an anthropogenic mineral - Index](https://d2cbg94ubxgsnp.cloudfront.net/Pictures/100x67/7/9/9/114799_Cataloguing-minerals-of-the-anthropocene---Simonkolleite---Index.jpg)
ResearchHuman-made minerals add to evidence for Anthropocene epoch
List of minerals that form either directly or indirectly as a result of humanity’s activities offers insights into our impact on Earth’s geology
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ResearchOcean chemistry changes triggered Earth's greatest extinction event
The Great Dying 250 million years ago has its roots in the intrusion of deadly sulfide rich waters into oxygenated shallows with lessons for today
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OpinionThe global dangers of melting permafrost
Russia’s thawing permafrost risks global warming, disease and ‘megaslumps’
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ResearchPrimitive microbe may offer a hotbed of methane
Microbe digests complex compounds from coal and turns them into methane
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ResearchSoil sponge soaking up far less carbon dioxide than expected
Geochemistry experiments suggest the climate might warm more than current models suggest
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ResearchNaturally occurring MOFs found in coal mine minerals
Rare minerals overturn conventional wisdom that metal–organic frameworks are only found in the lab
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ResearchMystery of black blotches on Smithsonian museum cleared up
Discolouration of iconic Washington, DC, building’s red stone is all down to a manganese oxide-rich rock varnish
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FeatureExplosive science
Nina Notman learns the role chemistry plays in monitoring volcanoes and understanding the impact of their eruptions
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ResearchEarthly xenon’s asteroid origins reveal planet’s genesis
Discovery that atmospheric xenon is unrelated to that in the mantle hints at two separate extra-terrestrial ‘deliveries’ of the element
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ResearchIron found in ancient rock is recycled from bacteria
Isotopic analysis suggests iron in banded rock formations can be traced back to ancient bacteria
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FeatureEngineering the climate
Could technologies that modify the Earth’s climate control systems help us limit global temperature rises? Nina Notman investigates
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ResearchEarth’s earliest continent formed like Iceland
Newly discovered rocks shed light on the geology of Earth’s first continental crust
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ResearchChemistry calculations reveal Earth's inner core
Higher levels of oxygen suggest early Earth may have been hotter than some model predict
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ResearchDinosaur mass extinction may have been triggered by acid rain
Asteroid impact could have produced enough sulfur trioxide to dramatically lower ocean pH
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FeatureExtreme extraction
The increasing price of precious metals has prompted mineral prospectors to consider unusual places. Jon Evans looks into the future of mining