They perform the gold-diggers’ function in the forests that grow above ore bodies – within multiple years they draw soluble salts out of the soil and die off leaving behind the concentrate with “enormous” precious metals content.
The researchers found native gold, silver and platinum salts in the dust of decayed stumps. A ton of their ashes contains 3 kilograms of silver, nearly 200 milligrams of gold and 5 grams of platinum.
The oxidation zone of some ore bodies is placed only at a distance of a meter and a half to three meters from the ground surface, and the tree roots can reach the zone. That is why, the researchers believe, the soil contains almost as much noble elements as the ore does. For centuries, trees and microorganisms gradually sucked them out of the depth and laid in the soil. A living substance decayed, washed out and turned into carbonic acid gas, but metals remained intact.
The researchers investigated mineralogical composition of protore and oxidized ores from the Dovatka and Mykert-Sanjeevsky deposits. It has turned out that native gold, silver and minerals, which include platinum, palladium, iridium, rhodium and ruthenium, are contained in the extinct bacteria capsules. The mineralogical composition of particles of bacterial origin turned out to be almost identical in the dust, soil and oxidized ores. Consequently, biomass of the trees, (reformed by bacteria), growing above the ore bodies’ oxidation zones is as if their natural continuation or their overground part.
There is peculiar division of labor among bacteria in the course of soil enrichment by precious metals. Sulfur-oxidizing bacteria leach minerals, i.e., transfer minerals from not readily soluble forms into labile forms, and iron bacteria glue them into new granules or nuggets. Trees assimilate the most readily soluble substances, which are later found in the cells of organolytic microbes feeding on dead timber. The latter also ensures normal vital functions of the first two groups.
Nadezda Markina | alfa
Early organic carbon got deep burial in mantle
25.04.2017 | Rice University
New atlas provides highest-resolution imagery of the Polar Regions seafloor
25.04.2017 | British Antarctic Survey
More and more automobile companies are focusing on body parts made of carbon fiber reinforced plastics (CFRP). However, manufacturing and repair costs must be further reduced in order to make CFRP more economical in use. Together with the Volkswagen AG and five other partners in the project HolQueSt 3D, the Laser Zentrum Hannover e.V. (LZH) has developed laser processes for the automatic trimming, drilling and repair of three-dimensional components.
Automated manufacturing processes are the basis for ultimately establishing the series production of CFRP components. In the project HolQueSt 3D, the LZH has...
Reflecting the structure of composites found in nature and the ancient world, researchers at the University of Illinois at Urbana-Champaign have synthesized thin carbon nanotube (CNT) textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.
"The structural robustness of thin metal films has significant importance for the reliable operation of smart skin and flexible electronics including...
The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.
Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...
The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...
Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.
Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...
20.04.2017 | Event News
18.04.2017 | Event News
03.04.2017 | Event News
25.04.2017 | Physics and Astronomy
25.04.2017 | Materials Sciences
25.04.2017 | Life Sciences