Microstructural characterization and in-situ sulfur isotopic analysis of silver-bearing sphalerite from the Edmond hydrothermal field, Central Indian Ridge

2018 ◽  
Vol 92 ◽  
pp. 318-347 ◽  
Author(s):  
Zhongwei Wu ◽  
Xiaoming Sun ◽  
Huifang Xu ◽  
Hiromi Konishi ◽  
Yan Wang ◽  
...  
Keyword(s):  
Microstructural Characterization ◽  
Isotopic Analysis ◽  
Hydrothermal Field ◽  
Central Indian Ridge ◽  
Indian Ridge

scholarly journals Hydrogenimonas thermophila gen. nov., sp. nov., a novel thermophilic, hydrogen-oxidizing chemolithoautotroph within the ε-Proteobacteria, isolated from a black smoker in a Central Indian Ridge hydrothermal field

2004 ◽  
Vol 54 (1) ◽  
pp. 25-32 ◽  
Author(s):  
Ken Takai ◽  
Kenneth H. Nealson ◽  
Koki Horikoshi
Keyword(s):  
Thermophilic Bacterium ◽  
Black Smoker ◽  
Central Indian Ridge ◽  
Rdna Sequences ◽  
16S Rdna Sequences ◽  
Group A ◽  
The Indian Ocean ◽  
Bacterium Strain ◽  
Indian Ridge

A novel thermophilic bacterium, strain EP1-55-1%T, was isolated from an in-situ colonization system deployed in a superheated, deep-sea, hydrothermal vent emission at the Kairei Field on the Central Indian Ridge in the Indian Ocean. The cells were highly motile rods, each possessing a single polar flagellum. Growth was observed between 35 and 65 °C (optimum temperature, 55 °C; 70 min doubling time) and between pH 4·9 and 7·2 (optimum, pH 5·9). The isolate was a microaerobic-to-anaerobic chemolithoautotroph capable of using molecular hydrogen as the sole energy source and carbon dioxide as the sole carbon source. Molecular oxygen, nitrate or elemental sulfur (S0) could serve as electron acceptors to support growth. The G+C content of the genomic DNA was 34·6 mol%. Phylogenetic analysis based on 16S rDNA sequences indicated that strain EP1-55-1%T represents the first strain for which taxonomic properties have been characterized within the previously uncultivated phylogroup classified as belonging to the uncultivated ε-Proteobacteria group A; the name Hydrogenimonas thermophila gen. nov., sp. nov. is proposed, with strain EP1-55-1%T (=JCM 11971T=ATCC BAA-737T) as the type strain.

Mineralogy and geochemistry of hydrothermal precipitates from Kairei hydrothermal field, Central Indian Ridge

2014 ◽  
Vol 354 ◽  
pp. 69-80 ◽  
Author(s):  
Yejian Wang ◽  
Xiqiu Han ◽  
Sven Petersen ◽  
Xianglong Jin ◽  
Zhongyan Qiu ◽  
...  
Keyword(s):  
Hydrothermal Field ◽  
Central Indian Ridge ◽  
Indian Ridge

Occurrences and distribution of “invisible” precious metals in sulfide deposits from the Edmond hydrothermal field, Central Indian Ridge

2016 ◽  
Vol 79 ◽  
pp. 105-132 ◽  
Author(s):  
Zhongwei Wu ◽  
Xiaoming Sun ◽  
Huifang Xu ◽  
Hiromi Konishi ◽  
Yan Wang ◽  
...  
Keyword(s):  
Precious Metals ◽  
Hydrothermal Field ◽  
Central Indian Ridge ◽  
Sulfide Deposits ◽  
Indian Ridge

scholarly journals Petrology of Peridotites and Related Gabbroic Rocks Around the Kairei Hydrothermal Field in the Central Indian Ridge

2014 ◽  
pp. 177-193 ◽  
Author(s):  
Tomoaki Morishita ◽  
Kentaro Nakamura ◽  
Takazo Shibuya ◽  
Hidenori Kumagai ◽  
Taichi Sato ◽  
...  
Keyword(s):  
Hydrothermal Field ◽  
Central Indian Ridge ◽  
Indian Ridge

Laboratory and in-situ analysis of comet dust

1988 ◽  
Vol 46 ◽  
pp. 8-9
Author(s):  
D.E. Brownlee ◽  
A.L. Albee
Keyword(s):  
Electron Microscopy ◽  
Solar System ◽  
Laboratory Study ◽  
Isotopic Analysis ◽  
Building Blocks ◽  
Sem Analysis ◽  
Early Solar System ◽  
Cometary Material ◽  
Comet Dust

Comets are primitive, kilometer-sized bodies that formed in the outer regions of the solar system. Composed of ice and dust, comets are generally believed to be relic building blocks of the outer solar system that have been preserved at cryogenic temperatures since the formation of the Sun and planets. The analysis of cometary material is particularly important because the properties of cometary material provide direct information on the processes and environments that formed and influenced solid matter both in the early solar system and in the interstellar environments that preceded it.The first direct analyses of proven comet dust were made during the Soviet and European spacecraft encounters with Comet Halley in 1986. These missions carried time-of-flight mass spectrometers that measured mass spectra of individual micron and smaller particles. The Halley measurements were semi-quantitative but they showed that comet dust is a complex fine-grained mixture of silicates and organic material. A full understanding of comet dust will require detailed morphological, mineralogical, elemental and isotopic analysis at the finest possible scale. Electron microscopy and related microbeam techniques will play key roles in the analysis. The present and future of electron microscopy of comet samples involves laboratory study of micrometeorites collected in the stratosphere, in-situ SEM analysis of particles collected at a comet and laboratory study of samples collected from a comet and returned to the Earth for detailed study.

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