Results 91 to 100 of about 81,493 (230)

High-Precision Mass-Dependent Molybdenum Isotope Variations in Magmatic Rocks Determined by Double-Spike MC-ICP-MS [PDF]

open access: yes, 2015
Small mass‐dependent variations of molybdenum isotope ratios in oceanic and island arc rocks are expected as a result of recycling altered oceanic crust and sediments into the mantle at convergent plate margins over geological timescales.
Coath, Christopher   +7 more
core   +5 more sources

Evidence for solar cycles in a late Holocene speleothem record from Dongge Cave, China [PDF]

open access: yes, 2014
The association between solar activity and Asian monsoon (AM) remains unclear. Here we evaluate the possible connection between them based on a precisely-dated, high-resolution speleothem oxygen isotope record from Dongge Cave, southwest China during the
A Grinsted   +54 more
core   +1 more source

Fe isotopic composition of Martian meteorites and some terrestrial analogues [PDF]

open access: yes, 2006
We report Fe isotopic composition of seven martian meteorites and other terrestrial materials that may be considered Martian ...
Anand, M.   +3 more
core  

A lead isotope perspective on urban development in ancient Naples [PDF]

open access: yes, 2016
The influence of a sophisticated water distribution system on urban development in Roman times is tested against the impact of Vesuvius volcanic activity, in particular the great eruption of AD 79, on all of the ancient cities of the Bay of Naples ...
Albarède, Francis   +6 more
core   +2 more sources

El volcanismo jurásico superior de la Formación Río Damas-Tordillo (33°-35,5°S): antecedentes su sobre petrogénesis, cronología, proveniencia e implicancias tectónicas [PDF]

open access: yes, 2014
Los depósitos continentales y volcánicos de la Formación Rio Damas-Tordillo, Jurásico Superior, representan un período restringido de sedimentación continental dentro del registro mayormente marino de la Cuenca Neuquina.
Calderón, Sergio   +7 more
core   +2 more sources

Fe isotopic composition of Martian meteorites [PDF]

open access: yes, 2005
In the present work, we have measured iron isotope compositions of a group of Martian meteorites to establish a baseline Fe-isotope fractionation pattern in the case of high-temperature igneous rocks from ...
Anand, M.   +3 more
core  

Reconstruction of Atmospheric Lead Pollution During the Roman Period Recorded in Belgian Ombrotrophic Peatlands Cores

open access: yesAtmosphere, 2018
Two peat cores from two bogs were used to record changes in the atmospheric Pb accumulation rate (Pb AR) in Belgium during the Roman period. The two records were compared to assess the reliability of peat cores as archives of atmospheric Pb deposition ...
Mohammed Allan   +5 more
doaj   +1 more source

Introducing a comprehensive data reduction algorithm for high-precision U-Th geochronology with isotope dilution MC-ICP-MS [PDF]

open access: yes, 2013
Multi collector inductively coupled plasma mass spectrometry (MC-ICP-MS) is being increasingly utilized for U-Th geochronology of carbonate deposits with comparable precision to thermal ionization mass spectrometry (TIMS) [1, 2].
Arienzo, Monica   +4 more
core  

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