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Boring to study slow earthquakes

Drill preparation. The team prepare the deep-sea drill for use on the seafloor. © 2021 JAMSTEC-IODP
Slow earthquakes are long-period earthquakes that are not so dangerous alone, but are able to trigger more destructive earthquakes. Their origins lie in tectonic plate boundaries where one plate subsides below another. Though the causal mechanism is already known, there has been a lack of data to accurately model the life cycle of slow earthquakes. For the first time, researchers use deep-sea boreholes to gauge pressures far below the seafloor. They hope data from this and future observations can aid the understanding of earthquake evolution.
The surface of the Earth lies upon gargantuan tectonic plates. The edges of these interact in different ways depending on the plates’ relative movement, composition and density. Where plates collide and one sinks below another is known as a subduction zone, often the site of what are known as slow earthquakes. These are low-frequency ....

Masa Kinoshita , Ocean Drilling Program , University Of Tokyo Earthquake Research Institute , Earthquake Research Institute , Integrated Ocean Drilling Program , Earthquake Research , Professor Masa Kinoshita , Nankai Trough , State Buildings , கடல் துளையிடுதல் ப்ரோக்ர்யாம் , பல்கலைக்கழகம் ஆஃப் டோக்கியோ பூகம்பம் ஆராய்ச்சி நிறுவனம் , பூகம்பம் ஆராய்ச்சி நிறுவனம் , ஒருங்கிணைந்த கடல் துளையிடுதல் ப்ரோக்ர்யாம் , பூகம்பம் ஆராய்ச்சி , நங்கை தொட்டி , நிலை கட்டிடங்கள் ,

New Geology articles published online ahead of print in May

Boulder, Colo., USA: Article topics include Zealandia, Earth's newly recognized continent; the topography of Scandinavia; an interfacial energy penalty;. ....

New Zealand General , New Zealand , United States , Rio Madre De Dios , Madre De Dios , Tao Yang , Aibing Li , El Laco , Pityusa Patera , Emilyc Geyman , Joels Scheingross , Pedro Waterton , Ryan Luo , Adamc Maloof , Rosseland Knutsen , Emilyc Creaser , Yiduo Liu , Rasmus Haugaard , Damien Daval , Emilyi Burt , Johnm Hanchar , Heriberto Roch , Evan Greenberg , Wyattm Bain , Ras Gharib , Mahmouda Faris ,

Multiple carbon incorporation strategies support microbial survival in cold subseafloor crustal fluids

19). Decreasing cell concentrations after drilling has also been observed in other CORKs [Juan de Fuca ridge flank; (
21)] and groundwater well systems (
5)], low cell counts likely indicate that the North Pond system had recovered from drilling and that the 2017 fluids (and resulting data) are the best representation of microbial activity in the cold, oxic crustal subseafloor aquifer to date.
Table 1 North Pond CORK fluids and bottom water values for cell enumeration, dissolved inorganic carbon (DIC), and dissolved organic carbon (DOC) from 2017 samples collected for this study.
Additional geochemistry (oxygen, nitrate, and pH) reproduced from (
5) also collected in 2017. Ammonium concentrations were all below detection ( ....

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Microbes deep beneath seafloor survive on byproducts of radioactive process -- Science & Technology -- Sott.net

© Justine Sauvage
Marine sediment samples used in the irradiation experiments.A team of researchers from the University of Rhode Island s Graduate School of Oceanography and their collaborators have revealed that the abundant microbes living in ancient sediment below the seafloor are sustained primarily by chemicals created by the natural irradiation of water molecules.
The team discovered that the creation of these chemicals is amplified significantly by minerals in marine sediment. In contrast to the conventional view that life in sediment is fueled by products of photosynthesis, an ecosystem fueled by irradiation of water begins just meters below the seafloor in much of the open ocean. This radiation-fueled world is one of Earth s volumetrically largest ecosystems. ....

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100-Million-Year-Old Seafloor Sediment Bacteria Have Been Resuscitated

100-Million-Year-Old Seafloor Sediment Bacteria Have Been Resuscitated
The evidence mounts that bacteria can be effectively immortal
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In 2010, Japanese scientists from the Integrated Ocean Drilling Program’s Expedition 329 sailed into the South Pacific Gyre with a giant drill and a big question.
The gyre is a marine desert more barren than all but the aridest places on Earth. Ocean currents swirl around it, but within the gyre, the water stills and life struggles because few nutrients enter. Near the center is both the Oceanic Pole of Inaccessibility (made famous by H.P. Lovecraft as the home of the be-tentacled Cthulhu) and the South Pacific garbage patch. At times the closest people are astronauts passing above on the International Space Station. ....

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