Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience
9.2K views | +8 today
Follow
 
Scooped by Ath Godelitsas
onto Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience
Scoop.it!

Elhunyt Bárdossy György geológus, az MTA rendes tagja

Elhunyt Bárdossy György geológus, az MTA rendes tagja | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Ath Godelitsas's insight:

Életének 88. évében, 2013. április 15-én elhunyt Bárdossy György Széchenyi-díjas magyar geológus, geokémikus, a Magyar Tudományos Akadémia Földtudományok Osztályának Akadémiai Aranyérmes rendes tagja. A bauxitkutatás neves tudósa a karsztbauxit és a laterit előfordulásával és keletkezésével foglalkozott, emellett a radioaktív hulladékok elhelyezési lehetőségeit is vizsgálta, és úttörő szerepet töltött be a matematikai módszerek földtudományi területen történő bevezetésében, alkalmazásában.

more...
No comment yet.
Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience
Your new post is loading...
Your new post is loading...
Scooped by Ath Godelitsas
Scoop.it!

Plate tectonics started at least 3.5 billion years ago

Plate tectonics started at least 3.5 billion years ago | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Empty description
Ath Godelitsas's insight:
more...
No comment yet.
Scooped by Ath Godelitsas
Scoop.it!

Hypothetical ultralow-density ice polymorphs

Hypothetical ultralow-density ice polymorphs | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it

It is found that a hypothetical zeolitic ice phase is less dense and more stable than the sparse ice structures reported by Huang et al. [Chem. Phys. Lett. 671, 186 (2017)].

more...
No comment yet.
Scooped by Ath Godelitsas
Scoop.it!

Mechanochemical Route and Recrystallization Strategy To Fabricate Mordenite Nanoparticles from Natural Zeolites

Mechanochemical Route and Recrystallization Strategy To Fabricate Mordenite Nanoparticles from Natural Zeolites | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Mechanochemical Route and Recrystallization Strategy To Fabricate Mordenite Nanoparticles from Natural Zeolites
more...
No comment yet.
Scooped by Ath Godelitsas
Scoop.it!

Crystal Engineering of Nanoporous Materials for Gas Storage and Separation

Crystal Engineering of Nanoporous Materials for Gas Storage and Separation | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Crystal Engineering of Nanoporous Materials for Gas Storage and Separation
more...
No comment yet.
Scooped by Ath Godelitsas
Scoop.it!

Synthesis of quenchable amorphous diamond

Synthesis of quenchable amorphous diamond | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Article
Ath Godelitsas's insight:
In this letter, the authors combine high pressure and in situ laser heating techniques to convert glassy carbon into “quenchable amorphous diamond”, and recover it to ambient conditions.
more...
No comment yet.
Scooped by Ath Godelitsas
Scoop.it!

Solid Phase Speciation and Solubility of Vanadium in Highly Weathered Soils

Solid Phase Speciation and Solubility of Vanadium in Highly Weathered Soils | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Empty description
Ath Godelitsas's insight:
The results demonstrate that kaolinite and Fe oxides can effectively sequester V in highly weathered soils by mechanisms of adsorption and structural incorporation and are relevant to other Fe-oxide-rich environments under acidic and oxic conditions.
more...
No comment yet.
Scooped by Ath Godelitsas
Scoop.it!

Big Data Points Humanity to New Minerals, New Deposits | Deep Carbon Observatory Portal

Big Data Points Humanity to New Minerals, New Deposits | Deep Carbon Observatory Portal | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
The private lives of minerals: Understanding how and where minerals hook up helps predict location, promises to speed discovery rate Predicted before they were found: New-to-science carbon-bearing minerals abellaite and parisite-(La) At least 1,500 minerals yet to be discovered   Contacts Terry...
more...
No comment yet.
Scooped by Ath Godelitsas
Scoop.it!

Network analysis of mineralogical systems

Network analysis of mineralogical systems | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Empty description
Ath Godelitsas's insight:
Network analysis provides a dynamic, quantitative, and predictive visualization framework for employing “big data” to explore complex and otherwise hidden higher-dimensional patterns of diversity and distribution in such mineral systems. The authors introduce and explore applications of mineral network analysis, in which mineral species are represented by nodes, while coexistence of minerals is indicated by lines between nodes.
more...
No comment yet.
Scooped by Ath Godelitsas
Scoop.it!

Mineral fibres: Crystal chemistry, chemical-physical properties, biological interaction and toxicity

Mineral fibres: Crystal chemistry, chemical-physical properties, biological interaction and toxicity | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it

This book presents the state of the art in the vast multidisciplinary research field of asbestos and of mineral fibres in general. The protagonists of the book are the mineral fibres with their immense complexity and poorly understood biochemical interactions. The approach of the chemist/mineralogist/crystallographer puts the fibre in focus whereas the approach of the biochemist/toxicologist/doctor assumes the perspective of the organism interacting with the fibre. The perspectives of both the ‘invader’ and the ‘invaded’ must be considered together to establish a conclusive model to explain the toxicity of mineral fibres. In fact, this sharing of different perspectives and working in a multidisciplinary way is the key to understanding the mechanism of asbestos-induced carcinogenesis.

more...
No comment yet.
Scooped by Ath Godelitsas
Scoop.it!

Hydrogen self-diffusion in single crystal olivine and electrical conductivity of the Earth’s mantle

Hydrogen self-diffusion in single crystal olivine and electrical conductivity of the Earth’s mantle | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Nominally anhydrous minerals formed deep in the mantle and transported to the Earth’s surface contain tens to hundreds of ppm wt H2O, providing evidence for the presence of dissolved water in the Earth’s interior.
more...
No comment yet.
Scooped by Ath Godelitsas
Scoop.it!

Elements of Eoarchean life trapped in mineral inclusions

Elements of Eoarchean life trapped in mineral inclusions | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Empty description
Ath Godelitsas's insight:
The authors study carbonaceous inclusions armoured within garnet porphyroblasts, by in situ infrared absorption on approximately 10−21 m3 domains within these inclusions. They show that the absorption spectra are consistent with carbon bonded to nitrogen and oxygen, and probably also to phosphate.
more...
No comment yet.
Scooped by Ath Godelitsas
Scoop.it!

Origins Center – Center for the study of origins and evolution of life, planets and the universe

Origins Center – Center for the study of origins and evolution of life, planets and the universe | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
more...
No comment yet.
Scooped by Ath Godelitsas
Scoop.it!

Revealing crystalline domains in a mollusc shell single-crystalline prism

Revealing crystalline domains in a mollusc shell single-crystalline prism | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Empty description
Ath Godelitsas's insight:
The authors provide the nanoscale spatial arrangement of the crystalline structure within the ‘single-crystalline’ prisms of the prismatic layer of a Pinctada margaritifera shell, exploiting three-dimensional X-ray Bragg ptychography microscopy.
more...
No comment yet.
Scooped by Ath Godelitsas
Scoop.it!

New Molecular Simulation Method To Determine Both Aluminum and Cation Location in Cationic #Zeolites

New Molecular Simulation Method To Determine Both Aluminum and Cation Location in Cationic #Zeolites | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
New Molecular Simulation Method To Determine Both Aluminum and Cation Location in Cationic Zeolites
Ath Godelitsas's insight:
The consequences of aluminum distribution on solid properties such as extraframework Na+ cation location have been analyzed and successfully compared with the available information for different zeolite topologies.
more...
No comment yet.
Scooped by Ath Godelitsas
Scoop.it!

Shallow-water hydrothermal vents

Shallow-water hydrothermal vents | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Shallow-water hydrothermal vents are widespread ecosystems that have been previously understudied compared to their deep-sea counterparts (Giovannelli et al., 2013), despite the fact that these systems were known long before the discovery of the deep-sea vents on the Galapagos Rift in 1977. Because of their proximity to the surface, shallow-water hydrothermal systems are influenced both by geothermally generated reducing power…
more...
No comment yet.
Scooped by Ath Godelitsas
Scoop.it!

The onset of widespread marine red beds and the evolution of ferruginous oceans

The onset of widespread marine red beds and the evolution of ferruginous oceans | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Evolution of ferruginous oceans
more...
No comment yet.
Scooped by Ath Godelitsas
Scoop.it!

Hidden Oceans? Unraveling the Structure of Hydrous Defects in the Earth’s Deep Interior

Hidden Oceans? Unraveling the Structure of Hydrous Defects in the Earth’s Deep Interior | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
High-pressure silicates making up the main proportion of the earth’s interior can incorporate a significant amount of water in the form of OH defects.
more...
No comment yet.
Scooped by Ath Godelitsas
Scoop.it!

Evidence for the Formation of Secondary Nanocrystalline Iron-Rich Phases on the Dolomite Surface

Evidence for the Formation of Secondary Nanocrystalline Iron-Rich Phases on the Dolomite Surface | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Empty description
Ath Godelitsas's insight:
Nanocrystalline secondary phases precipitated in the course of dolomite dissolution at pH 3 and 80 °C were identified as (nano)hematite, ferrihydrite, and an ankerite like mineral using X-ray diffraction, transmission electron microscopy, MicroRaman and X-ray photoelectron spectrometry.
more...
No comment yet.
Scooped by Ath Godelitsas
Scoop.it!

Research in Mineralogy and Materials Science: Nanocrystals and the environment at @UCBerkeley

Research in Mineralogy and Materials Science:  Nanocrystals and the environment at @UCBerkeley | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it



Nanocrystals and the environment

more...
No comment yet.
Scooped by Ath Godelitsas
Scoop.it!

Constraining the rate of oceanic deoxygenation leading up to a Cretaceous Oceanic Anoxic Event (OAE-2: ~94 Ma)

Constraining the rate of oceanic deoxygenation leading up to a Cretaceous Oceanic Anoxic Event (OAE-2: ~94 Ma) | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
The rates of marine deoxygenation leading to Cretaceous Oceanic Anoxic Events are poorly recognized and constrained. If increases in primary productivity are the primary driver of these episodes, progressive oxygen loss from global waters should predate enhanced carbon burial in underlying sediments—the diagnostic Oceanic Anoxic Event relic. Thallium isotope analysis of organic-rich black shales from Demerara Rise across Oceanic Anoxic Event 2 reveals evidence of expanded sediment-water interface deoxygenation ~43 ± 11 thousand years before the globally recognized carbon cycle perturbation. This evidence for rapid oxygen loss leading to an extreme ancient climatic event has timely implications for the modern ocean, which is already experiencing large-scale deoxygenation.
Ath Godelitsas's insight:
more...
No comment yet.
Scooped by Ath Godelitsas
Scoop.it!

Initial pulse of Siberian Traps sills as the trigger of the end-Permian mass extinction

Initial pulse of Siberian Traps sills as the trigger of the end-Permian mass extinction | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Article
Ath Godelitsas's insight:
Large igneous provinces characterized by sill complexes are more likely to trigger catastrophic global environmental change than their flood basalt- and/or dike-dominated counterparts.
more...
No comment yet.
Scooped by Ath Godelitsas
Scoop.it!

Geochemical constraints on the Hadean environment from mineral fingerprints of prokaryotes

Geochemical constraints on the Hadean environment from mineral fingerprints of prokaryotes | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it

The geologic record of Earth’s first 500 Myr is confined mainly to Hadean detrital zircons. Newly discovered graphite inclusions in some of these zircons extend evidence for the emergence of life to 4.1 Ga. Deep-root models indicate that at ~4.2 Ga Eubacteria and Archaebacteria diverged from the last universal common ancestor (LUCA), which existed in Hadean between ~4.4-4.2 Ga. In addition, recent findings6 suggest that prokaryotic metabolism likely remained unchanged for billions of years. Hence, the common chemical features imprinted in the metabolic processes of both prokaryotic kingdoms may be inherited from LUCA.

more...
No comment yet.
Scooped by Ath Godelitsas
Scoop.it!

Continental shelves as potential resource of rare earth elements

Continental shelves as potential resource of rare earth elements | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Rare earth elements (REE) have received considerable attention in the past ten years, in part as a result of the tightening of export quotas from the monopolistic Chinese producers which has recently sparked a wave of speculation on REE prices, as observed in 2011. Nowadays, REE are still considered critical because they are a key component of the transition towards a competitive and low-carbon energy economy
more...
No comment yet.