Results 41 to 50 of about 305,177 (315)

Applications of Lead Isotopes to Ore Geology, Metallogenesis and Exploration

open access: yes, 2023
AbstractAlthough lead isotopes are most commonly used to date geological events, including mineralizing events, they also can provide information on many aspects of metallogeny and can be directly used in mineral exploration. Lead isotope data are generally reported as ratios of radiogenic isotopes normalized to the non-radiogenic isotope204Pb (e.g ...
David L. Huston, David C. Champion
openaire   +1 more source

Fractal Prediction of Grouting Volume for Treating Karst Caverns along a Shield Tunneling Alignment

open access: yesApplied Sciences, 2017
Karst geology is common in China, and buried karst formations are widely distributed in Guangdong province. In the process of shield tunneling, the abundant water resources present in karst caverns could lead to the potential for high water ingress, and ...
Wen-Chieh Cheng   +4 more
doaj   +1 more source

Metamorphism and its bearing on geosystems

open access: yesGeosystems and Geoenvironment, 2022
The Earth is a dynamic, ever-changing planet, and there exist many feedbacks and cycles that operate within and between its subsystems. Interactions between processes operating in the solid Earth, atmosphere, hydrosphere, and biosphere have become ...
Richard M. Palin
doaj   +1 more source

Conodont biostratigraphy of the Crawford Group, Southern Uplands, Scotland [PDF]

open access: yes, 2002
Extensive new conodont collections from the Crawford Group, the oldest succession in the Southern Uplands of Scotland, support the previously documented biostratigraphical ages for the included formations.
Armstrong, Howard A.   +3 more
core   +1 more source

From Waste to Value: Conversion of Calcium Sulfate to Vaterite via Carbon Capture and Storage

open access: yesAdvanced Functional Materials, EarlyView.
This study introduces a new concept for carbon management that relies on the carbonation of industrial gypsum waste and yields phase‐pure vaterite at ambient conditions without any additives. The obtained vaterite is further shown to be a reactive material that develops compressive strength in aqueous suspensions like conventional cements.
Carlos Pimentel   +4 more
wiley   +1 more source

Les « Éducations à » et les sciences de la nature : entre dédisciplinarisation et redisciplinarisation

open access: yesÉducation et Socialisation, 2014
In France, “educations for” has recently gained ground inside curricula, leading us to rethink the aims and operation of disciplinary lessons. We choose to focus on science disciplines (biology, geology and physics), by considering their approaches as a ...
Denise Orange Ravachol
doaj   +1 more source

Estimation of VS30 using shallow depth time-averaged shear wave velocity of Rawalpindi–Islamabad, Pakistan

open access: yesGeomatics, Natural Hazards & Risk, 2023
The time-averaged shear wave velocity of top 30 m (VS30) is the most commonly used parameter to classify a site and evaluate its amplification characteristics for the seismic design.
Muhammad Bilal Adeel   +6 more
doaj   +1 more source

Block Copolymers: Emerging Building Blocks for Additive Manufacturing

open access: yesAdvanced Functional Materials, EarlyView.
This review addresses how block copolymer (BCP) physics and rheology have led to the widespread use of BCPs in advanced additive manufacturing techniques, with particular emphasis on the untapped potential of these nanostructured materials toward achieving multi‐scale architected materials with unique, programmable material properties.
Alice S. Fergerson   +3 more
wiley   +1 more source

Argumentation on tasks of Biology and Geology Portuguese textbooks [PDF]

open access: yesInvestigações em Ensino de Ciências, 2012
Argumentation is a transversal dimension to the process of constructing scientific knowledge, which is recognized as increasingly important. The Portuguese official curricula, such as the syllabus of the subject of biology and geology, from secondary ...
Paulo Almeida   +2 more
doaj  

Rocks Really Rock: electronic field trips via Web Google Earth can generate positive impacts in attitudes toward Earth sciences in middle- and high-school students [PDF]

open access: yesGeoscience Communication
Earth sciences (ESs) are relevant to society and its relationship with the Earth system. However, ES education in K-12 environments in the United States faces several challenges, including limited exposure to ESs, lack of awareness of ES careers, and low
C. Ortiz-Guerrero, J. Loizzo
doaj   +1 more source

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