Deposits in lakes and seas contain a wealth of information related to the environ-mental conditions prevalent during their genesis. Thus, they are an unfailing archive, particularly with regard to paleo-environmental conditions, for environmental and climate scientists. Now, the fine art is to interpret the derived data correctly.
For this purpose, geoscientists often use "witnesses" or proxies. Widely known witnesses from sediments are fossils, the remains of plants and animals. By comparisons with their well-studied living relatives, ideas about the conditions that predominated at the time of sediment deposition can be deduced. Minerals potentially offer further valuable insights but only if the environmental circumstances present at the time of their formation have been deciphered.
A team of researchers from Germany, Austria and Spain, under the co-ordination of geochemists from the Leibniz Institute for Baltic Sea Research Warnemünde (IOW) has now succeeded in reproducing the formation of a BaMn-double carbonate originally found in sediments from the oxygen-deficient region of the Landsort Deep in the laboratory, and thus to elucidate the environmental conditions that gave birth to it. This carbonate, which has yet to be named, serves as a mineral witness for future research to hone in on very specific biogeochemical processes and environmental conditions.
„Sediments in which barium-manganese carbonate are found contain dissolved methane“says Michael E. Böttcher, the leading scientist. "We were able to demonstrate that the prerequisite for the genesis of this carbonate was the microbial decomposition of sulfate and the destruction of barium and manganese minerals stemming from the water column. Methane seems to be involved in these processes.” The consortium around Michael Böttcher used a broad range of methods resulting in a detailed characterization of the carbonate enable its unmistakable detection in other locations.
Thus, wherever this new mineral witness is found, additional important information on the environmental conditions at the time of the carbonate's deposition will be revealed, thanks to the fundamental work of the Warnemünde-based geochemists and their co-workers. The word is out - the search can begin.These results were published in:
The IOW is a member of the Leibniz Association, which currently includes 86 research insti-tutes and a scientific infrastructure for research. The Leibniz Institutes' fields range from the natural sciences, engineering and environmental sciences, business, social sciences and space sciences to the humanities. Federal and state governments together support the Institute. In total, the Leibniz Institute has 16 800 employees, of which approximately are 7,800 scientists, and of those 3300 young scientists. The total budget of the Institute is more than 1.4 billion Euros. Third-party funds amount to approximately € 330 million per year.
A promising target in the quest for a 1-million-year-old Antarctic ice core
24.05.2018 | University of Washington
Tropical Peat Swamps: Restoration of Endangered Carbon Reservoirs
24.05.2018 | Leibniz-Zentrum für Marine Tropenforschung (ZMT)
The more electronics steer, accelerate and brake cars, the more important it is to protect them against cyber-attacks. That is why 15 partners from industry and academia will work together over the next three years on new approaches to IT security in self-driving cars. The joint project goes by the name Security For Connected, Autonomous Cars (SecForCARs) and has funding of €7.2 million from the German Federal Ministry of Education and Research. Infineon is leading the project.
Vehicles already offer diverse communication interfaces and more and more automated functions, such as distance and lane-keeping assist systems. At the same...
A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.
The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...
At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.
At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...
There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?
At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...
So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics
Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...
25.05.2018 | Event News
02.05.2018 | Event News
13.04.2018 | Event News
25.05.2018 | Event News
25.05.2018 | Machine Engineering
25.05.2018 | Life Sciences