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Celebrating Marie Tharp 期刊论文
Science, 2020
作者:  Marco Romano;  Francesco Latino Chiocci
收藏  |  浏览/下载：4/0  |  提交时间：2020/12/22
Some fish fins are as sensitive to touch as human fingertips 新闻
来源平台：NewScientist. 发布日期：2020
作者:  admin
收藏  |  浏览/下载：0/0  |  提交时间：2020/11/09
Biological rhythms in the deep-sea hydrothermal mussel Bathymodiolus azoricus 期刊论文
NATURE COMMUNICATIONS, 2020, 11 (1)
作者:  Mat, Audrey M.;  Sarrazin, Jozee;  Markov, Gabriel, V;  Apremont, Vincent;  Dubreuil, Christine;  Eche, Camille;  Fabioux, Caroline;  Klopp, Christophe;  Sarradin, Pierre-Marie;  Tanguy, Arnaud;  Huvet, Arnaud;  Matabos, Marjolaine
收藏  |  浏览/下载：16/0  |  提交时间：2020/07/14
Hydrothermal (NN)-N-15-N-15 abundances constrain the origins of mantle nitrogen 期刊论文
NATURE, 2020, 580 (7803) : 367-+
作者:  Zhao, Steven;  Jang, Cholsoon;  Liu, Joyce;  Uehara, Kahealani;  Gilbert, Michael;  Izzo, Luke;  Zeng, Xianfeng;  Trefely, Sophie;  Fernandez, Sully;  Carrer, Alessandro;  Miller, Katelyn D.;  Schug, Zachary T.;  Snyder, Nathaniel W.;  Gade, Terence P.;  Titchenell, Paul M.;  Rabinowitz, Joshua D.;  Wellen, Kathryn E.
收藏  |  浏览/下载：14/0  |  提交时间：2020/05/13

Nitrogen is the main constituent of the Earth'  s atmosphere, but its provenance in the Earth'  s mantle remains uncertain. The relative contribution of primordial nitrogen inherited during the Earth'  s accretion versus that subducted from the Earth'  s surface is unclear(1-6). Here we show that the mantle may have retained remnants of such primordial nitrogen. We use the rare (NN)-N-15-N-15 isotopologue of N-2 as a new tracer of air contamination in volcanic gas effusions. By constraining air contamination in gases from Iceland, Eifel (Germany) and Yellowstone (USA), we derive estimates of mantle delta N-15 (the fractional difference in N-15/N-14 from air), N-2/Ar-36 and N-2/He-3. Our results show that negative delta N-15 values observed in gases, previously regarded as indicating a mantle origin for nitrogen(7-10), in fact represent dominantly air-derived N-2 that experienced N-15/N-14 fractionation in hydrothermal systems. Using two-component mixing models to correct for this effect, the (NN)-N-15-N-15 data allow extrapolations that characterize mantle endmember delta N-15, N-2/Ar-36 and N-2/He-3 values. We show that the Eifel region has slightly increased delta N-15 and N-2/Ar-36 values relative to estimates for the convective mantle provided by mid-ocean-ridge basalts(11), consistent with subducted nitrogen being added to the mantle source. In contrast, we find that whereas the Yellowstone plume has delta N-15 values substantially greater than that of the convective mantle, resembling surface components(12-15), its N-2/Ar-36 and N-2/He-3 ratios are indistinguishable from those of the convective mantle. This observation raises the possibility that the plume hosts a primordial component. We provide a test of the subduction hypothesis with a two-box model, describing the evolution of mantle and surface nitrogen through geological time. We show that the effect of subduction on the deep nitrogen cycle may be less important than has been suggested by previous investigations. We propose instead that high mid-ocean-ridge basalt and plume delta N-15 values may both be dominantly primordial features.


  
Deep high-temperature hydrothermal circulation in a detachment faulting system on the ultra-slow spreading ridge 期刊论文
NATURE COMMUNICATIONS, 2020, 11 (1)
作者:  Tao, Chunhui;  Seyfried, W. E., Jr.;  Lowell, R. P.;  Liu, Yunlong;  Liang, Jin;  Guo, Zhikui;  Ding, Kang;  Zhang, Huatian;  Liu, Jia;  Qiu, Lei;  Egorov, Igor;  Liao, Shili;  Zhao, Minghui;  Zhou, Jianping;  Deng, Xianming;  Li, Huaiming;  Wang, Hanchuang;  Cai, Wei;  Zhang, Guoyin;  Zhou, Hongwei;  Lin, Jian;  Li, Wei
收藏  |  浏览/下载：19/0  |  提交时间：2020/05/13
Deep-sea Hydrothermal Vent Microbial Communities Surprisingly Productive 新闻
来源平台：Environmental Monitor. 发布日期：2018
作者:  admin
收藏  |  浏览/下载：1/0  |  提交时间：2019/04/17
Genetic Study of Yeti Crabs Reveals Likely Common Ancestor—and Vulnerability 新闻
来源平台：Environmental Monitor. 发布日期：2018
作者:  admin
收藏  |  浏览/下载：46/0  |  提交时间：2019/04/17
Microbes in underground aquifers beneath deep-sea Mid-Atlantic Ridge 'chow down' on carbon 新闻
来源平台：US National Scientific Foundation (NSF). 发布日期：2018
作者:  admin
收藏  |  浏览/下载：0/0  |  提交时间：2019/04/17
Microbes in underground aquifers beneath deep-sea Mid-Atlantic Ridge 'chow down' on carbon 新闻
来源平台：US National Scientific Foundation (NSF). 发布日期：2018
作者:  admin
收藏  |  浏览/下载：0/0  |  提交时间：2019/04/17
Microbes in underground aquifers beneath deep-sea Mid-Atlantic Ridge 'chow down' on carbon 新闻
来源平台：US National Scientific Foundation (NSF). 发布日期：2018
作者:  admin
收藏  |  浏览/下载：0/0  |  提交时间：2019/04/17