Lecture: Andy Knoll – Systems Paleobiology

May 30, 2017By Tais W DahlUncategorized

The relationship between Earth and life through time How Systems Paleobiology uses physiology as the conceptual bridge between paleobiological and geochemical data sets and provides us with a template for understanding global climate change and evaluation of the habitability of other planets.  Professor Andrew H. Knoll, Fisher Professor of Natural History,Departments of Organismic and Evolutionary … Read More

Publication: Molybdenum re-dissolves and re-precipitates in euxinic lake sediments

April 20, 2017By Tais W DahlPublication

In a paper published in Chemical Geology entitled: “Molybdenum isotope fractionation and speciation in a euxinic lake—Testing ways to discern isotope fractionation processes in a sulfidic setting”, we compare molybdenum isotope and speciation data from lake sediments deposited under euxinic (anoxic and sulfidic) waters. We conclude that the chemical Mo species present in sediments did not … Read More

MSc thesis defense: Sune F. Månsson

April 18, 2017By Tais W DahlTalk

When Wednesday April 26, 2017 at 12:30-14:00 Where Undervisningslokalet Øster Farimagsgade 2D What Sune F Månsson will defend his MSc thesis entitled: “Did Bioturbating Animals in the Early Cambrian Influence the Global Biogeochemical Cycles of Carbon and Sulfur?” Abstract A major global change in the biogeochemical cycle of carbon in the Early Cambrian, Stage 2 … Read More

Call for applications: PhD in geochemistry / geobiology. Deadline April 30

March 15, 2017By Tais W DahlJob announcement

The project is to study how the invasions of land plants influenced the oxygenation state of Earth’s oceans. The project will include experimental geochemistry (laboratory work), field work and geochemical modelling. Check out the official call here: We are looking for a self-driven student with a background in experimental geochemistry (or equivalent) and a strong motivation to conduct research in Earth history. Please … Read More

Molybdenum review: The answer is 42

January 26, 2017By Tais W DahlPublication

Molybdenum is element number 42 in the periodic table. Although, this element is a trace constituent in the Earth and life, it currently deserves a lot of attention. With Brian Kendall and Ariel Anbar, I have written a review that brings the latest update on the various aspects of molybdenum isotopes and their current use in geochemistry, cosmochemistry and … Read More

Publication: Molybdenum interacts directly with organic matter in sulfidic environments

December 21, 2016By Tais W DahlPublication, Research

Molybdenum is one of the most powerful elements used to track hydrogen sulfide and oxygen in the ocean from the geological record. Still, we have an incomplete understanding of the chemical removal pathway between ocean and sediments.  Sediments deposited under anoxic and sulfidic waters display tight correlations between their contents of molybdenum (Mo) and total organic matter  (TOC). Yet, association does not mean causation. Instead, … Read More

Dr. Li Da is visiting from Nanjing University

October 5, 2016By Tais W DahlResearch

Dr. Li Da is visiting the our research group to carry out isotope analyses of approx. 525 million years old limestone from China. These limestone comes from the Cambrian explosion, a period of approx. 540-520 million years ago, when skeletonized, marine animals suddenly diversified into new species.  The study will compare the stable isotopic composition of uranium deposited in a Chinese … Read More

Back to the Grind

Back to the Grind

August 31, 2016By Tais W DahlNews

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A Much Needed Vacation

A Much Needed Vacation

August 31, 2016By Tais W DahlNews

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