A5042698065- Paleontology and Stratigraphy of Fossils
- Geochemistry and Elemental Analysis
- Geological and Geochemical Analysis
- Geology and Paleoclimatology Research
- Hydrocarbon exploration and reservoir analysis
- Methane Hydrates and Related Phenomena
- Astro and Planetary Science
- Geochemistry and Geologic Mapping
- Radioactive element chemistry and processing
- Calcium Carbonate Crystallization and Inhibition
- Isotope Analysis in Ecology
- Planetary Science and Exploration
- Geological and Geophysical Studies
- Origins and Evolution of Life
- Geomagnetism and Paleomagnetism Studies
- Mineralogy and Gemology Studies
- Microbial Fuel Cells and Bioremediation
- Marine and environmental studies
- Photosynthetic Processes and Mechanisms
- High-pressure geophysics and materials
- Geological Studies and Exploration
- Groundwater and Isotope Geochemistry
- Ion channel regulation and function
- Mesoporous Materials and Catalysis
- Clay minerals and soil interactions
London Centre for Nanotechnology
2015-2024
University College London
2015-2024
Institute of Deep-Sea Science and Engineering
2024
Chinese Academy of Sciences
2024
China University of Geosciences
2017-2024
Birkbeck, University of London
2019-2024
State Key Laboratory of Biogeology and Environmental Geology
2023
Planetary Science Institute
2020-2022
Carnegie Institution for Science
2006-2015
Boston College
2011-2015
The mineralogy of terrestrial planets evolves as a consequence range physical, chemical, and biological processes. In pre-stellar molecular clouds, widely dispersed microscopic dust particles contain approximately dozen refractory minerals that represent the starting point planetary mineral evolution. Gravitational clumping into protoplanetary disk, star formation, resultant heating in stellar nebula produce primary constituents chondritic meteorites, including chondrules calcium-aluminum...
ABSTRACT Stromatolites, organosedimentary structures formed by microbial activity, are found throughout the geological record and important markers of biological history. More conspicuous in past, stromatolites occur today a few shallow marine environments, including Hamelin Pool Shark Bay, Western Australia. often have been considered contemporary analogs to ancient stromatolites, yet little is known about communities that build them. We used DNA-based molecular phylogenetic methods do not...
The distribution of major phosphate deposits in the Precambrian sedimentary rock record is restricted to periods that witnessed global biogeochemical changes, but cause this unclear. oldest known phosphogenic event occurred around 2.0 Ga and was followed, after more than 1.3 billion years, by an even larger Neoproterozoic. Phosphorites (phosphate-rich rocks contain 15% P2O5) preserve a unique seawater chemistry, biological activity, oceanographic changes. In attempt emphasize potentially...
Microbial life permeates Earth's critical zone and has likely inhabited nearly all our planet's surface near subsurface since before the beginning of sedimentary rock record. Given vast time that Earth been teeming with life, do astrobiologists truly understand what geological features untouched by biological processes would look like? In search for extraterrestrial in Universe, it is to determine constitutes a biosignature across multiple scales, how this compares "abiosignatures" formed...
The oldest putative fossils occur as hematite filaments and tubes in jasper-carbonate banded iron formations from the 4280- to 3750-Ma Nuvvuagittuq Supracrustal Belt, Québec. If biological origin, these might have affinities with modern descendants; however, if abiotic, they could indicate complex prebiotic forms on early Earth. Here, we report images of centimeter-size, autochthonous that are pectinate-branching, parallel-aligned, undulated, containing Fe2+-oxides. These microstructures...
Research Article| October 01, 2013 Biogeochemical Cycling of Nitrogen on the Early Earth Christophe Thomazo; Thomazo 1UMR CNRS/uB6282 Biogéosciences, Université de Bourgogne21000 Dijon, FranceE-mail: Christophe.Thomazo@u-bourgogne.fr Search for other works by this author on: GSW Google Scholar Dominic Papineau 2London Centre Nanotechnology and Department Sciences, University College London, Gower Street, WC1E 6BT, UK3Geophysical Laboratory, Carnegie Institution WashingtonWashington, DC...
Abstract Member IV of the Ediacaran Doushantuo Formation records recovery from most negative carbon isotope excursion in Earth history. However, main biogeochemical controls that ultimately drove this have yet to be elucidated. Here, we report new and nitrogen concentration data Nanhua Basin (South China), where δ 13 C values carbonates (δ carb ) rise − 7‰ −1‰ 15 N decrease +5.4‰ +2.3‰. These trends are proposed arise a equilibrium cycles primary production overcomes secondary as source...
Progress in understanding mineral evolution, Earth's changing near-surface mineralogy through time, depends on the availability of detailed information localities known ages and geologic settings. A comprehensive database including this information, employing mindat.org web site as a platform, is now being implemented. This resource will incorporate software to correlate range occurrences properties vs. it thus facilitate studies diversity, distribution, associations, characteristics...
Research Article| December 01, 2014 Graphitic Carbons and Biosignatures Sylvain Bernard; Bernard 1Institut de Minéralogie, Physique des Matériaux, et Cosmochimie (IMPMC), Sorbonne Universités – MNHN, UPMC Université Paris 06, CNRS UMR 7590, IRD 20675005 Paris, FranceE-mail: sbernard@mnhn.fr Search for other works by this author on: GSW Google Scholar Dominic Papineau 2London Centre Nanotechnology Department of Earth Sciences, University College London, 17-19 Gordon Street, WC1H 0AH, United...