Results 81 to 90 of about 23,092 (234)

Evolution of the Santana do Araguaia (PA) region based on geology and Pb-Pb zircon geochronology from granitoid rocks [PDF]

Geologia USP. Série Científica, 2014
The region of Santana do Araguaia, focus of this study, is located in the southeast of Pará State, which, in its turn, lies in the southeastern Amazonian Craton.
Lívio Wagner Chaves Corrêa, Moacir José Buenano Macambira   +1 more
doaj  

The Materiality of the Cloggs Cave Rockshelter's Painting, GunaiKurnai Country (East Gipplsland), Southeastern Australia

Archaeometry, EarlyView.
ABSTRACT The materiality of the white pigment motif at the Cloggs Cave rockshelter, near Buchan in GunaiKurnai Country (southeastern Australia), contains details about the cultural and environmental contexts in which the art was created and preserved. Here, we (1) present physicochemical analyses of the pigment composition; (2) explore implications for
Courtney Webster, Jillian Huntley, Russell Mullett, Bruno David, Joanna Fresløv, Helen E. A. Brand, Jean‐Jacques Delannoy, Robert G. Gunn, GunaiKurnai Land and Waters Aboriginal Corporation   +8 more
wiley   +1 more source

Geochemical and granulometric fingerprints of 8200 years of westerly wind variability in inner‐fjord lake sediments from Svalbard

Boreas, EarlyView.
The Arctic is warming faster than any other region on Earth. As sea ice diminishes, the surface boundary conditions, such as roughness and air–sea coupling, change and open‐water fetch increases. This may enhance wind forcing on Arctic coasts. Lake sediments can record these changes through the deposition of wind‐blown grains and elements, offering ...
Zofia Stachowska, Willem G. M. van der Bilt, Jan Kavan, Mark F. A. Furze, Ingunn H. Thorseth, Mateusz C. Strzelecki   +5 more
wiley   +1 more source

Effects of mica in manufactured sand on rheological behavior and hydration and hardening of cement paste

Zhongwai Gonglu
To address the key issue of mica minerals in manufactured sand limiting concrete performance, this study compared the synergistic and differential effects of biotite and granite powder and systematically investigated the effects of biotite and mica ...
Fan Hua, Guo Shuangxi, Wang Zhipeng, Li Qinghua, Wang Xinpeng, Wang Jiliang, Ke Guoju   +6 more
doaj   +1 more source

Composition of biotite within the Wushan granodiorite, Jiangxi Province, China: Petrogenetic and metallogenetic implications

Earth Sciences Research Journal, 2014
The Wushan skarn copper deposit is genetically associated with the Wushan granodiorite. In this study, we investigate the petrography and mineralogy of biotites within the Wushan granodiorite.
Qian Dong, Yangsong Du, Zhenshan Pang, Wenrui Miao, Wei Tu   +4 more
doaj   +1 more source

Appraisal of Six Natural Mica Reference Materials for In Situ Rb‐Sr Geochronology

Geostandards and Geoanalytical Research, EarlyView.
Key Points Evaluated six natural mica reference materials for in situ LA‐ICP‐MS/MS Rb‐Sr geochronology using geochemical, microstructural and isotopic characterisation. Identified robust primary reference materials: Mount Dromedary biotite (99.37 Ma) and Mica‐Fe biotite (307.75 Ma). La Posta biotite and Högsbo muscovite are suitable secondary reference
Hugo K.H. Olierook, Bruno V. Ribeiro, Janne Liebmann, Kai Rankenburg, Fred Jourdan, Ahmad Redaa, Jarred C. Lloyd, Thomas M. Belgrano, Carlos R. Corella Santa Cruz, Yujin Jegal, Julien Mercadier, Catherine Zimmermann, Jie Yu, Andreas Zametzer, Christopher L. Kirkland, Sarah E. Gilbert, Craig D. Storey, Luc S. Doucet, Isabelle Jones, Louisa Stokes, Thomas Zack, Delia Rösel, Denis Fougerouse, Jonas Kaempf, Priyanjan Datta, Hijas Hameed, Noreen J. Evans, Malcolm P. Roberts, Juraj Farkas, Stijn Glorie, Celia Mayers, R. Adam Frew, Sarah Al Odeh, Chloe E. Roche, Massimo Chiaradia, Alicia M. Cruz‐Uribe, Alan S. Collins, Andreas Karlsson, Anusha Shantha Kumara   +38 more
wiley   +1 more source

Transforming Biotite Waste into a Lithium Resource: Mechanical Activation-Assisted Mild Acid Leaching of Nepheline Syenite By-Products

Metals
This study presents an efficient and environmentally friendly approach for lithium recovery from biotite-rich wastes generated during nepheline syenite processing by combining mechanical activation with sulfuric acid leaching.
Zeynep Üçerler-Çamur, Feridun Boylu, Kudret Tahsin Perek, Murat Olgaç Kangal   +3 more
doaj   +1 more source

P‐T Uncertainty in Subsolidus Metamorphic Systems: Sources, Patterns and Controls

Journal of Metamorphic Geology, EarlyView.
ABSTRACT Phase equilibrium modelling of metamorphic rocks is subject to multiple, superimposed sources of uncertainty that affect pressure–temperature (P$$ P $$‐T$$ T $$) estimates, making it difficult to independently distinguish and evaluate the contribution of each source.
I. P. Cawood, T. Mackay‐Champion
wiley   +1 more source

Biotite–Brine Interactions under Acidic Hydrothermal Conditions: Fibrous Illite, Goethite, and Kaolinite Formation and Biotite Surface Cracking

, 2016
To ensure safe and efficient geologic CO2 sequestration (GCS), it is crucial to have a better understanding of CO2–brine–rock interactions under GCS conditions. In this work, using biotite (K(Mg,Fe)3AlSi3O10(OH,F)2) as a model clay mineral, brine-biotite
Jessica R. Ray (1591132), Yandi Hu (1406746), Young-Shin Jun (1273782)   +2 more
core   +1 more source

Machine Learning Biotite Thermobarometry

, 2022
Li X, Zhang C. Machine Learning Biotite Thermobarometry. Submitted to Journal of Geophysical Research: Solid Earth.THIS DATASET IS ARCHIVED AT DANS/EASY, BUT NOT ACCESSIBLE HERE.
Zhang, C (via Mendeley Data)
core   +1 more source