Results 41 to 50 of about 116,871 (355)

Potassium Isotope Compositions of Carbonaceous and Ordinary Chondrites: Implications on the Origin of Volatile Depletion in the Early Solar System [PDF]

, 2020
Solar system materials are variably depleted in moderately volatile elements (MVEs) relative to the proto-solar composition. To address the origin of this MVE depletion, we conducted a systematic study of high-precision K isotopic composition on 16 carbonaceous chondrites (CCs) of types CM1-2, CO3, CV3, CR2, CK4-5 and CH3 and 28 ordinary chondrites ...
arxiv   +1 more source

Deglaciation history and subsequent lake dynamics in the Siljan region, south‐central Sweden, based on new LiDAR evidence and sediment records

Earth Surface Processes and Landforms, Volume 47, Issue 15, Page 3515-3545, December 2022., 2022
Glacial geomorphology and postglacial landforms, derived from LiDAR‐based digital terrain models, together with radiocarbon‐dated sediment sequences, form the basis for landscape reconstruction spanning c. 2000 years (10,500–8500 cal. bp). After formation of streamlined terrain and ribbed moraine tracts followed intense glaciofluvial activity at ...
Per Möller, Svante Björck, Thomas P. F. Dowling, Dan Hammarlund, Martin Jakobsson, Karl Ljung, Martin Lund, Savvas Paradeisis‐Stathis   +7 more
wiley   +1 more source

Sodic alkaline magmatism in Eastern Paraguay revisited: geochemical and petrological implications

Brazilian Journal of Geology, 2023
Associated with subordinate potassic rocks, Mesozoic to Cenozoic sodic alkaline rocks are represented by four distinct provinces in Eastern Paraguay: Alto Paraguay, Central, Misiones, and Asunción; additional Rio Apa and Amambay provinces are exclusively
Celso de Barros Gomes, Piero Comin-Chiaramonti, Victor Fernandez Velázquez   +2 more
doaj   +1 more source

Machine Learning in Petrology: State-of-the-Art and Future Perspectives

Journal of Petrology
The present manuscript reports on the state-of-the-art and future perspectives of Machine Learning (ML) in petrology. To achieve this goal, it first introduces the basics of ML, including definitions, core concepts, and applications.
Maurizio Petrelli
semanticscholar   +1 more source

A method to detect abrupt shifts in river channel position using a Landsat‐derived water occurrence record

Earth Surface Processes and Landforms, Volume 47, Issue 15, Page 3546-3557, December 2022., 2022
Detecting abrupt shifts in river channel position is challenging but important for understanding how rivers change through time. Using three decades of water occurrence data derived from Landsat, we create a method that produces time‐stacked images that highlight abrupt channel movements as temporal discontinuities in channel position, or tears in the ...
Dylan B. Lee, Harrison K. Martin, Douglas A. Edmonds   +2 more
wiley   +1 more source

Geological structure and petrology of the Nizhne-Sinyachikhinsky granitoid massif (Alapayevsk-Sukhoi Log porphyry copper zone, the Middle Urals)

Литосфера, 2020
Research subject. The geological structure and rock composition of the Nizhne-Sinyachikhinsky plagiogranite massif, which is part of the Alapaevsk-Sukholozhsky zone, is promising for the Cu(Au,Mo)-porphyric mineralization type, were studied.
S. V. Pribavkin, A. V. Коrovko, I. A. Gottman   +2 more
doaj   +1 more source

Magma storage conditions beneath Krakatau, Indonesia: insight from geochemistry and rock magnetism studies

Frontiers in Earth Science, 2023
Understanding the evolution of magma storage conditions on volcanoes which have had more than one caldera-forming eruption (CFE) is important to know about past and present conditions, as a key to forecast future potential hazards.
Aditya Pratama, Aditya Pratama, Dini Nurfiani, Putu Billy Suryanata, Putu Billy Suryanata, Taufik Ismail, Taufik Ismail, Taufik Ismail, Gabriela Nogo Retnaningtyas Bunga Naen, Mirzam Abdurrachman, Mirzam Abdurrachman, Wilfridus Ferdinando Supriyadi Banggur, Nining Sumawati Asri, Ratika Benita Nareswari, Satria Bijaksana, Muhammad Hanif, Estu Kriswati, Idham Andri Kurniawan, Idham Andri Kurniawan, Nugroho Imam Setiawan   +19 more
doaj   +1 more source

The airborne lava-seawater interaction plume at Kilauea Volcano, Hawaii [PDF]

Petrology igneous metamorphic and volcanic studies ...
Edmonds, M., Gerlach, T. M.
core   +1 more source

Primary crustal melt compositions: Insights into the controls, mechanisms and timing of generation from kinetics experiments and melt inclusions [PDF]

, 2017
We explore the controls, mechanisms and timing of generation of primary melts and their compositions, and show that the novel studies of melt inclusions in migmatites can provide important insights into the processes of crustal anatexis of a particular ...
Acosta-Vigil, Antonio, Bartoli, Omar, Buick, Ian, Cesare, Bernardo, Hermann, J\ue3\ub6rg, London, David, Morgan, George B.   +6 more
core   +1 more source

Topographic thresholds for gully head formation in badlands

Earth Surface Processes and Landforms, Volume 47, Issue 15, Page 3558-3587, December 2022., 2022
Gully topographic threshold model was extended to badlands, on the basis of data collected in the Mediterranean environment in Italy and Spain, characterized by diversified climatic, lithological, geological and anthropogenic settings. Criteria for the attribution of curve number values has been more objectively defined in order to reduce arbitrariness
Mauro Rossi, Dino Torri, Sofie De Geeter, Cati Cremer, Jean Poesen   +4 more
wiley   +1 more source