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Discovery of a new type of seamount chain in the Pacific Ocean
Ocean islands, seamounts and volcanic ridges are thought to form above mantle plumes – hot upwellings that probable rise from the core-mantle boundary. Yet, this mechanism cannot explain many volcanic features on the Pacific Ocean floor and some might instead be caused by cracks in the oceanic crust linked to the reorganization of plate motions.
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New in GCA (v.156, 1 May 2015)
Mn–Cr systematics in primitive meteorites: Insights from mineral separation and partial dissolution

Development of recent chronologies and evaluation of temporal variations in Pb fluxes and sources in lake sediment and peat cores in a remote, highly radiogenic environment, Cairngorm Mountains, Scottish Highlands

Tracing the composition and origin of fluids at an ancient hydrocarbon seep (Hollard Mound, Middle Devonian, Morocco): A Nd, REE and stable isotope study

Experimental study of the replacement of calcite by calcium sulphates

Experimental measurements of U60 nanocluster stability in aqueous solution

Hf–W chronology of the eucrite parent body

Investigation of extractable organic compounds in deep-sea hydrothermal vent fluids along the Mid-Atlantic Ridge

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New in G-Cubed (v.16, issue 3)
A global model for cave ventilation and seasonal bias in speleothem paleoclimate records

Structural heterogeneity of the midcrust adjacent to the central Alpine Fault, New Zealand: Inferences from seismic tomography and seismicity between Harihari and Ross

Natural remanent magnetization acquisition in bioturbated sediment: General theory and implications for relative paleointensity reconstructions

Tracking the Late Jurassic apparent (or true) polar shift in U-Pb-dated kimberlites from cratonic North America (Superior Province of Canada)

Reconciling subduction dynamics during Tethys closure with large-scale Asian tectonics: Insights from numerical modeling

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Ascent or no ascent? How hot material is stopped in Earth's mantle
GFZ German Research Centre for Geosciences via ScienceDaily
Gigantic volumes of hot material rising from the deep earth's mantle to the base of the lithosphere have shaped the face of our planet. Provided they have a sufficient volume, they can lead to break-up of continents or cause mass extinction events in certain periods of the Earth's history.
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Scientists find large water system beneath Antarctica's dry valleys
An international team of researchers discovered salty groundwater beneath the Dry Valleys region of the world’s coldest and driest continent, according to findings published in the current edition of Nature Communications. The discovery of groundwater in this area may offer a glimpse into past climactic events on Antarctica, as well as clues about the potential for life on other planets.
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Did dinosaur-killing asteroid trigger largest lava flows on Earth?
University of California - Berkeley via
The asteroid that slammed into the ocean off Mexico 66 million years ago and killed off the dinosaurs probably rang the Earth like a bell, triggering volcanic eruptions around the globe that may have contributed to the devastation, according to a team of University of California, Berkeley, geophysicists.
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Missed last week's issue? See which articles your colleagues read most.

    Thawing permafrost feeds climate change (AGU)
Oldest fossils controversy resolved (University of Bristol via ScienceDaily)
Yellowstone supervolcano: Magma reservoir big enough to fill Grand Canyon 11 times discovered (International Business Times)
Did diamond-bearing orangeites originate from MARID-veined peridotites in the lithospheric mantle? (Nature)

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