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Recycling and metabolic flexibility dictate life in the lower oceanic crust 期刊论文
NATURE, 2020, 579 (7798) : 250-+
作者:  Zhou, Peng;  Yang, Xing-Lou;  Wang, Xian-Guang;  Hu, Ben;  Zhang, Lei;  Zhang, Wei;  Si, Hao-Rui;  Zhu, Yan;  Li, Bei;  Huang, Chao-Lin;  Chen, Hui-Dong;  Chen, Jing;  Luo, Yun;  Guo, Hua;  Jiang, Ren-Di;  Liu, Mei-Qin;  Chen, Ying;  Shen, Xu-Rui;  Wang, Xi;  Zheng, Xiao-Shuang;  Zhao, Kai;  Chen, Quan-Jiao;  Deng, Fei;  Liu, Lin-Lin;  Yan, Bing;  Zhan, Fa-Xian;  Wang, Yan-Yi;  Xiao, Geng-Fu;  Shi, Zheng-Li
收藏  |  浏览/下载：89/0  |  提交时间：2020/05/13

The lithified lower oceanic crust is one of Earth'  s last biological frontiers as it is difficult to access. It is challenging for microbiota that live in marine subsurface sediments or igneous basement to obtain sufficient carbon resources and energy to support growth(1-3) or to meet basal power requirements(4) during periods of resource scarcity. Here we show how limited and unpredictable sources of carbon and energy dictate survival strategies used by low-biomass microbial communities that live 10-750 m below the seafloor at Atlantis Bank, Indian Ocean, where Earth'  s lower crust is exposed at the seafloor. Assays of enzyme activities, lipid biomarkers, marker genes and microscopy indicate heterogeneously distributed and viable biomass with ultralow cell densities (fewer than 2,000 cells per cm(3)). Expression of genes involved in unexpected heterotrophic processes includes those with a role in the degradation of polyaromatic hydrocarbons, use of polyhydroxyalkanoates as carbon-storage molecules and recycling of amino acids to produce compounds that can participate in redox reactions and energy production. Our study provides insights into how microorganisms in the plutonic crust are able to survive within fractures or porous substrates by coupling sources of energy to organic and inorganic carbon resources that are probably delivered through the circulation of subseafloor fluids or seawater.


  
The April 2017 M(w)6.5 Botswana Earthquake: An Intraplate Event Triggered by Deep Fluids 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2018, 45 (17) : 8886-8896
作者:  Gardonio, B.;  Jolivet, R.;  Calais, E.;  Leclere, H.
收藏  |  浏览/下载：36/0  |  提交时间：2019/04/09
intraplate earthquake  InSAR  precursory phase  source inversion  lower crust  
On the Role of Lower Crust and Midlithosphere Discontinuity for Cratonic Lithosphere Delamination and Recycling 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2018, 45 (15) : 7425-7433
作者:  Wang, Zhensheng;  Kusky, Timothy M.;  Capitanio, Fabio A.
收藏  |  浏览/下载：32/0  |  提交时间：2019/04/09
craton destruction  delamination  midlithosphere discontinuity  lower crust  intraplate orogeny  
The 2017 Jiuzhaigou Earthquake: A Complicated Event Occurred in a Young Fault System 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2018, 45 (5) : 2230-2240
作者:  Sun, Jianbao;  Yue, Han;  Shen, Zhengkang;  Fang, Lihua;  Zhan, Yan;  Sun, Xiangyu
收藏  |  浏览/下载：29/0  |  提交时间：2019/04/09
Jiuzhaigou earthquake  joint inversion  viscous lower crust  Tibetan Plateau  Minshan Uplift Zone  fault system