Results 31 to 40 of about 481,510 (353)

Insights into secondary reactions occurring during atmospheric ablation of micrometeoroids [PDF]

, 2016
Ablation of micrometeoroids during atmospheric entry yields volatile gases such as water, carbon dioxide, and sulfur dioxide, capable of altering atmospheric chemistry and hence the climate and habitability of the planetary surface.
Court, RW, Tan, J
core   +1 more source

Evaluation of the performance of four chemical transport models in predicting the aerosol chemical composition in Europe in 2005 [PDF]

, 2016
© Author(s) 2016.Four regional chemistry transport models were applied to simulate the concentration and composition of particulate matter (PM) in Europe for 2005 with horizontal resolution 20 km.
Butler, Tim, Denier van der Gon, Hugo, Friedrich, Rainer, Hendricks, Johannes, Hendriks, Carlijn, Kong, Xin, Kukkonen, Jaakko, Lawrence, Mark, Prank, Marje, Righi, Mattia, Samaras, Zissis, Sausen, Robert, Semeena, Valiyaveetil, Sofiev, Mikhail, Sokhi, Ranjeet, Tsyro, Svetlana, Vazhappilly Francis, Xavier   +16 more
core   +3 more sources

Geology, petrography, mineral chemistry and fluids inclusion of the Kalate Shab iron skarn (East of Sarbisheh, Southern Khorasan)

Journal of Economic Geology, 2021
Introduction Extensive Eocene–Oligocene magmatic rocks in the Lut–Sistan region, eastern Iran crop out as a huge magmatic province (Pang et al., 2013).
Fatemeh Yari, Mohammad Hossein Zarrinkoub, Seyyed Saeid Mohammadi   +2 more
doaj   +1 more source

Boron isotope ratio (delta B-11) measurements in water framework directive monitoring programs: comparison between double focusing sector field ICP and thermal ionization mass spectrometry [PDF]

, 2010
International audienceThe aim of our research was to compare delta B-11 measurements performed with thermal ionization mass spectrometry (TIMS) and sector field-inductively coupled plasma-mass spectrometry (SF-ICP-MS) and evaluate the feasibility of ...
Aggarwal, Aggarwal, Aggarwal, Agnès Bregnot, Al-Ammar, Allan, Barth, Barth, Bassett, Boulyga, Chetelat, Chetelat, Coetzee, Coplen, David Widory, Demuth, Dongmei Xue, Eisenhut, Eisenhut, Emmanuelle Petelet, Encinar, Gaillardet, Gonfiantini, Gregoire, Gregoire, Gäbler, Heumann, Ishikawa, Jan Bronders, Kasemann, Komor, Kristof Tirez, Lemarchand, Mather, Pascal Boeckx, Spivack, Spivack, Tonarini, Vanhaecke, Vengosh, Weiser, Widory, Widory, Wilfried Brusten, Xue   +44 more
core   +4 more sources

Biotite as a petrogenetic discriminator in the polymetamorphosed rocks: A case study from the Champaner supracrustal rocks, Western India

Geosystems and Geoenvironment
The mineral chemistry of Fe-Mg biotite has served as an aid to the petrogenesis of igneous rocks, especially for identifying the parent magma compositions. Though the interpretation of igneous and metamorphic processes utilizing biotite mineral chemistry
Parita K. Gorania, Gayatri N. Akolkar, Aditya U. Joshi, Manoj A. Limaye, Mahendra K. Singh   +4 more
doaj   +1 more source

The Chemical Composition of Garnet for Sedimentary Provenance Determination, North Coast of Rio de Janeiro State, Brazil [PDF]

Anuário do Instituto de Geociências, 2018
The chemical composition of garnet, together with the analysis of the heavy minerals and their textures, is an important tool for accurate sedimentary provenance studies. The coastal segment of Northern Rio de Janeiro State, limited by the deltas of the
Sarah Siqueira da Cruz Guimarães Sousa, Eliane Guedes, João Wagner Alencar Castro, Ciro Alexandre Ávila, Reiner Neumann   +4 more
doaj   +1 more source

Petrogenesis and implications of the Dupangling compound granite in southern Hunan Province, China: Constraints from mineralogical chemistry, zircon U-Pb age, geochemistry and Nd-Hf isotope

Dizhi lixue xuebao, 2022
In this paper, zircon SHRIMP U-Pb geochronology, petrology, mineral chemistry, petrogeochemistry, Sm-Nd and Lu-Hf isotopes were studied for the eastern part of the Dupangling pluton, which is located at the western section of Nanling at the junction of ...
CHEN Di, LUO Peng, ZENG Zhifang, LIANG Enyun, PENG Yunyi, JIA Pengyuan, XIONG Miao, ZOU Guangjun   +7 more
doaj   +1 more source

The origins and physical roots of life’s dual – metabolic and genetic – nature [PDF]

, 2017
This review paper aims at a better understanding of the origin and physical foundation of life’s dual – metabolic and genetic – nature. First, I give a concise ‘top-down’ survey of the origin of life, i.e., backwards in time from extant DNA/RNA/protein ...
De Tiège, Alexis
core   +2 more sources

Hydration of silica and its role in the formation of quartz veins - Part 2

Substantia, 2019
The aqueous chemistry of silica and the formation of abundant polymeric silica species in natural sediment accumulations is set out in Part 1. Part 2 continues to describe the amorphous silica in sediments and presents more evidence for the formation of ...
John Elliston
doaj   +1 more source

Characterization of Red, Pink, Orange, and Purple Gem-Quality Spinel from Four Important Areas

Crystals, 2023
Spinel is a precious stone with a long history. In ancient societies spinel was considered to be an imitation of ruby. With the depletion of ruby mineral resources, gem—grade spinel has attracted more and more attention from consumers. In the last decade,
Qian Xu, Bo Xu, Yujie Gao, Siying Li
doaj   +1 more source