Trace elements at the intersection of marine biological and geochemical evolution
Life requires a wide variety of bioessential trace elements to act as structural components
and reactive centers in metalloenzymes. These requirements differ between organisms and …
and reactive centers in metalloenzymes. These requirements differ between organisms and …
Bioactive trace metals and their isotopes as paleoproductivity proxies: An assessment using GEOTRACES‐era data
Phytoplankton productivity and export sequester climatically significant quantities of
atmospheric carbon dioxide as particulate organic carbon through a suite of processes …
atmospheric carbon dioxide as particulate organic carbon through a suite of processes …
A shale-hosted Cr isotope record of low atmospheric oxygen during the Proterozoic
The emergence and expansion of animal life on Earth represents a dramatic shift in the
structure and complexity of the biosphere. A lack of firm constraints on surface oxygen levels …
structure and complexity of the biosphere. A lack of firm constraints on surface oxygen levels …
Highly fractionated chromium isotopes in Mesoproterozoic-aged shales and atmospheric oxygen
The history of atmospheric oxygen through the Mesoproterozoic Era is uncertain, but may
have played a role in the timing of major evolutionary developments among eukaryotes …
have played a role in the timing of major evolutionary developments among eukaryotes …
Sedimentary pyrite sulfur isotopes track the local dynamics of the Peruvian oxygen minimum zone
Sulfur cycling is ubiquitous in sedimentary environments, where it mediates organic carbon
remineralization, impacting both local and global redox budgets, and leaving an imprint in …
remineralization, impacting both local and global redox budgets, and leaving an imprint in …
A new estimate of detrital redox-sensitive metal concentrations and variability in fluxes to marine sediments
The enrichment and depletion of redox sensitive trace metals in marine sediments have
been used extensively as paleoredox proxies. The trace metals in shale are comprised of …
been used extensively as paleoredox proxies. The trace metals in shale are comprised of …
Correlated molybdenum and uranium isotope signatures in modern anoxic sediments: Implications for their use as paleo-redox proxy
Redox-sensitive trace metals and their isotopes have emerged as important tools that are
used to reconstruct the redox-evolution of the ocean-atmosphere system. However …
used to reconstruct the redox-evolution of the ocean-atmosphere system. However …
Volatile loss following cooling and accretion of the Moon revealed by chromium isotopes
Terrestrial and lunar rocks share chemical and isotopic similarities in refractory elements,
suggestive of a common precursor. By contrast, the marked depletion of volatile elements in …
suggestive of a common precursor. By contrast, the marked depletion of volatile elements in …
[PDF][PDF] Oxygen, climate and the chemical evolution of a 1400 million year old tropical marine setting
X Wang, S Zhang, H Wang, CJ Bjerrum… - American Journal of …, 2017 - ajsonline.org
The **amaling Formation is an exceptionally well-preserved sedimentary succession
deposited on a marine passive margin about 1400 million years ago. We used a multi-proxy …
deposited on a marine passive margin about 1400 million years ago. We used a multi-proxy …
Chromium isotope geochemistry
L Qin, X Wang - Reviews in Mineralogy and …, 2017 - pubs.geoscienceworld.org
Chromium consists of four stable isotopes (50 Cr, 52 Cr, 53 Cr and 54 Cr) with natural
abundances of 4.35%, 83.79%, 9.50% and 2.36%, respectively (Rossman and Taylor 1998) …
abundances of 4.35%, 83.79%, 9.50% and 2.36%, respectively (Rossman and Taylor 1998) …