Results 131 to 140 of about 4,448 (271)

Evaluating maturity of organic matter in hydrated C1 and CM‐like clasts and a dehydrated clast within a polymict eucrite and a howardite

Meteoritics &Planetary Science, EarlyView.
Abstract Volatile‐rich xenolithic clasts in different types of brecciated meteorites represent unique pristine solar system material. This study investigates the maturity and thermal history of organic matter using Raman spectroscopy and aqueous alteration effects using infrared spectroscopy in the matrix of 15 volatile‐rich clasts (C1 and CM‐like ...
Swarna Prava Das, Alessandro Maturilli, Aurélie Van den Neucker, Markus Patzek, Dipak Kumar Panda, Gopal K. Pradhan, Guneshwar Thangjam, Surya Snata Rout   +7 more
wiley   +1 more source

Time constraints on the formation of lithospheric mantle beneath cratons: a re-Os isotope and platinum group element study of peridotite xenoliths from northern Canada and Lesotho, [PDF]

, 2001
Understanding the generation and evolution of cratonic lithospheric keels requires detailed knowledge of their age, timescale of formation, and the relationship between the crust and mantle part of the lithosphere.
Irvine, Gordon James
core  

Measuring the 34S and 33S Isotopic Ratios of Volatile Sulfur during Planet Formation

The Astrophysical Journal
Stable isotopic ratios constitute powerful tools for unraveling the thermal and irradiation history of volatiles. In particular, we can use our knowledge of the isotopic fractionation processes active during the various stages of star, disk, and planet ...
Alice S. Booth, Maria N. Drozdovskaya, Milou Temmink, Hideko Nomura, Ewine F. van Dishoeck, Luke Keyte, Charles J. Law, Margot Leemker, Nienke van der Marel, Shota Notsu, Karin Öberg, Catherine Walsh   +11 more
doaj   +1 more source

Geochemical characteristics and implications of pyrite sulfur isotope in Fengcheng Formation of Mahu Sag, Junggar Basin

Shiyou shiyan dizhi
The Fengcheng Formation in the Mahu Sag of the Junggar Basin spans the Carboniferous and Permian boundary and represents a typical shale oil reservoir deposited in a marine to continental transitional environment.
Chengzhou JIANG, Guiwen WANG, Song WANG, Yilin ZHANG, Yuyue HUANG   +4 more
doaj   +1 more source

Changes in photosynthesis and grazing facilitate growth of a mixotrophic protist under ocean acidification and warming

New Phytologist, EarlyView.
Grazing rates of Ochromonas CCMP2951 expressed as carbon obtained per mean cell volume (a) and Caut/het‐photosynthetically fixed carbon divided by carbon obtained through grazing (b) in the four experimental treatments. Summary Mixotrophic protists capable of both photosynthesis and phagotrophy are key members of marine plankton communities.
Shai Slomka, Jolanda M. H. Verspagen, Rocio B. Rodriguez‐Perez, Jef Huisman, Susanne Wilken   +4 more
wiley   +1 more source

Physiology and Transcriptomics Reveal Divergent Strategies of Mycorrhiza‐Mediated Drought Adaptation in Poplar

Plant, Cell &Environment, EarlyView.
ABSTRACT Mycorrhizal symbiosis shapes plant growth and stress resilience. Here, we compared physiological and molecular responses of poplars (P. x canescens) colonised by Paxillus involutus (Pi) or Cenococcum geophilum (Cg) under control conditions, drought stress and recovery.
Huili Shi, Zhuchou Lu, Andrea Polle
wiley   +1 more source

Evolution Model for the Paleoproterozoic Talvivaara Mudstone‐Hosted Ni‐Zn‐Cu‐Co Deposit in Fennoscandia

Terra Nova, EarlyView.
ABSTRACT The Paleoproterozoic Talvivaara mudstone is a very large sulfidic Ni‐Co deposit that records enhanced organic matter accumulation during the global Shunga Event. Here, rock geochemistry and microscale S and Fe isotope composition of in situ pyrrhotites and pyrites are studied in well‐characterised, well‐preserved drill core samples.
Raimo Lahtinen, Jaakko J. Laitala, Joonas J. Virtasalo, Martin J. Whitehouse   +3 more
wiley   +1 more source

Diversity decoupled from sulfur isotope fractionation in a sulfate‐reducing microbial community [PDF]

, 2019
Jesse R. Colangelo-Lillis, Claus Pelikan, Craig W. Herbold, Ianina Altshuler, Alexander Loy, Lyle G. Whyte, Boswell A. Wing   +6 more
openalex   +1 more source

Fractionation of Stable Isotopes of Sulfur by Microorganisms and Their Role in Deposition of Native Sulfur [PDF]

Applied Microbiology, 1957
G E, JONES, R L, STARKEY
openaire   +2 more sources

Experimental determination of equilibrium sulfur isotope fractionation factors in the gas-silicate melt-sulfide liquid system

International audienceSulfur, despite its minor presence (~ 250 µg.g -1 ) in the bulk silicate Earth, can exhibit high solubility in melts, up to 1.5 wt. %, depending on the melt's oxidation state. Sulfur is also integral to the formation of economically
Labidi, Jabrane, Narváez, Diego, F, Koga, Kenneth, T, Rose-Koga, Estelle, F, Mohan, Shashank Prabha   +4 more
core   +1 more source