Results 151 to 160 of about 818,473 (313)

The Compositional Structure of the Asteroid Belt

, 2015
The past decade has brought major improvements in large-scale asteroid discovery and characterization with over half a million known asteroids and over 100,000 with some measurement of physical characterization.
Alexander, Conel M. O'D., Binzel, Richard P., Chapman, Clark R., DeMeo, Francesca E., Walsh, Kevin J.   +4 more
core   +1 more source

The making of pure quartzose sand in continental interiors: Paraná River (Brazil and Argentina)

Sedimentology, EarlyView.
ABSTRACT As part of a comprehensive project on sedimentary processes in South America, this study focuses on sediment generation in the intracratonic Paraná Basin and monitors the evolution of sand composition along the Paraná River from central Brazil to the Río de la Plata estuary in Argentina.
Eduardo Garzanti, Marta Barbarano, Mara Limonta, Guido Pastore, Pieter Vermeesch, Giovanni Vezzoli   +5 more
wiley   +1 more source

The Mid-IR Spectral Effects of Darkening Agents and Porosity on the Silicate Surface Features of Airless Bodies [PDF]

We systematically measured the mid-IR spectra of different mixtures of three silicates (antigorite, lizardite, and pure silica) with varying effective porosities and amounts of darkening agent (iron oxide and carbon).
Carlson, Robert W., Hand, Kevin P., Poston, Michael J., Wray, James J., Young, Cindy L.   +4 more
core   +1 more source

Evolution Model for the Paleoproterozoic Talvivaara Mudstone‐Hosted Ni‐Zn‐Cu‐Co Deposit in Fennoscandia

Terra Nova, EarlyView.
ABSTRACT The Paleoproterozoic Talvivaara mudstone is a very large sulfidic Ni‐Co deposit that records enhanced organic matter accumulation during the global Shunga Event. Here, rock geochemistry and microscale S and Fe isotope composition of in situ pyrrhotites and pyrites are studied in well‐characterised, well‐preserved drill core samples.
Raimo Lahtinen, Jaakko J. Laitala, Joonas J. Virtasalo, Martin J. Whitehouse   +3 more
wiley   +1 more source

Silicate Weathering [PDF]

Nature, 1970
openaire   +1 more source

South Asian monsoon history over the past 60 kyr recorded by radiogenic isotopes and clay mineral assemblages in the Andaman Sea [PDF]

, 2015
The Late Quaternary variability of the South Asian (or Indian) monsoon has been linked with glacial‐interglacial and millennial scale climatic changes but past rainfall intensity in the river catchments draining into the Andaman Sea remains poorly ...
Ali, Sajid, Frank, Martin, Gebregiorgis, Daniel, Giosan, Liviu, Hathorne, Ed C., Johnson, Joel E., Kutterolf, Steffen, Stattegger, Karl, Stumpf, Roland   +8 more
core   +1 more source

Chemical and mineral composition of ores of the Buruktal deposit (Orenburg Region): Type of the nickel-bearing weathering crust

Руды и металлы
The Buruktal nickel and cobalt deposit, the largest in Russia, is located in the Orenburg Region and is confined to the weathering crust of the ultramafic massif of the same name in the southern portion of the Buruktal synclinorium.
Borisov A. A., Sycheva N. A., Boguslavsky M. A., Vildanov D. I.   +3 more
doaj   +1 more source

Chemical weathering of the volcanic soils of Isla Santa Cruz (Galápagos Islands, Ecuador) [PDF]

, 2014
We present a study on weathering of volcanic soils using 43 profiles (131 horizons) sampled in Santa Cruz Island (Galapagos Islands). Several weathering indices, based on chemical composition, are used. Since the geological material is highly homogeneous
Ferro, C, Martínez-Cortízas, A, Rodríguez-Lado, L, Stoops, Georges, Taboada, T   +4 more
core   +1 more source

Seasonal variability in silicate weathering signatures recorded by Li isotopes in cave drip-waters

, 2021
David J. Wilson, P. V. Strandmann, John White, Gary Tarbuck, A. Marca, T. Atkinson, P. Hopley   +6 more
semanticscholar   +1 more source

Quantification of CO2 uptake by enhanced weathering of silicate minerals applied to acidic soils

International Journal of Greenhouse Gas Control, 2023
C. Dietzen, M. Rosing
semanticscholar   +1 more source