Results 61 to 70 of about 43,364 (200)

Systemic Governance From Below: Story Telling to Empower Access to the Commons Through Mapping and Modelling: A Mixed Methods Approach

Systems Research and Behavioral Science, EarlyView.
ABSTRACT Access to forests, farming land and the Citarum river is limited in Tarumajaya; furthermore, many do not own their own housing and are dependent on the public and private landowners in the area. The region of Tarumajaya faces significant challenges in access to crucial resources such as forests, farming land and the Citarum river, leading to a
Rudolf Wirawan, Janet Judy McIntyre‐Mills, R. Riswanda R. Riswanda, Ida Widianingsih, Indra Gunawan   +4 more
wiley   +1 more source

A CONTRIBUTION TO THE RESEARCH ON RARE EARTH ELEMENTS IN SEDIMENTARY ROCKS

Rudarsko-geološko-naftni Zbornik, 1989
The main features of the geochemistry of rare earth elements (REE), REE mineralogy and the REE i contents and distributions in sedimentary rocks are presented.
Josip Crnički
doaj  

Alkaline magmatism and REE resources: a European overview, and links to Canada [PDF]

, 2014
In recent years, the European Union (EU) has prioritised the issue of critical raw materialsa – those materials which are important for the economy, but have risks to their supply.
Deady, Eimear, Finch, Adrian, Goodenough, Kathryn, Lusty, Paul, Shaw, Richard, Wall, Frances   +5 more
core  

Introduction to a Resources Special Issue on Criticality of the Rare Earth Elements: Current and Future Sources and Recycling

, 2018
The rare earth elements (REE) are vital to modern technologies and society and are amongst the most important of the critical elements. This special issue of Resources examines a number of facets of these critical elements, current and future sources of ...
Jowitt, Simon M.
core   +2 more sources

Evidence for dissolution-reprecipitation of apatite and preferential LREE mobility in carbonatite-derived late-stage hydrothermal processes [PDF]

, 2016
The Tundulu and Kangankunde carbonatite complexes in the Chilwa Alkaline Province, Malawi, contain late-stage, apatite-rich lithologies termed quartz-apatite rocks.
Appleton, J. Don, Broom-Fendley, Sam, Gunn, Gus, Styles, Mike T., Wall, Frances   +4 more
core   +1 more source

Passive environmental DNA sampling: A review of current practices, limitations and future directions for biodiversity monitoring

Methods in Ecology and Evolution, EarlyView.
Abstract Passive environmental DNA (eDNA) sampling is rapidly emerging as a powerful alternative to active sampling methods (e.g. direct water sampling), with a rapidly growing diversity of tested approaches but little methodological convergence.
Fidji Sandré, Marie‐Pier Brochu, Valérie S. Langlois   +2 more
wiley   +1 more source

1 billion-year-old cell contents preserved in monazite and xenotime

Scientific Reports, 2019
Exceptional microfossil preservation, whereby sub-cellular details of an organism are conserved, remains extremely rare in the Precambrian rock record.
David Wacey, Eva Sirantoine, Martin Saunders, Paul Strother   +3 more
doaj   +1 more source

RETROGRESSION OF ORTHOPYROXENE – BEARING CHARNOCKITIC GNEISS AROUND IKERAM-IBARAM AKOKO, SOUTHWESTERN NIGERIA [PDF]

Geological Behavior
This paper presents the petrography and mineral chemistry of charnockitic gneisses exposed at Ikeram-Ibaram within the Precambrian Basement Complex of southwestern Nigeria. Quartz, plagioclase, perthite, amphibole, biotite and orthopyroxene are essential
Anthony Victor Oyeshomo, Uwe Altenberger, Anthony Bolarinwa   +2 more
doaj   +1 more source

Oldhamite in enstatite achondrites (Aubrites) [PDF]

, 1996
Properties of oldhamite (ideally CaS) in aubrites are summarized and compared to oldhamite in enstatite chondrites. The origin of the high REE abundances in aubritic oldhamite and the diversity of REE abundance patterns is addressed.
Katharina Lodders
core   +1 more source

Ultramafic xenoliths from the Bearpaw Mountains, Montana, USA: evidence for multiple metasomatic events in the lithospheric mantle beneath the Wyoming craton [PDF]

, 2004
Ultramafic xenoliths in Eocene minettes of the Bearpaw Mountains volcanic field (Montana, USA), derived from the lower lithosphere of the Wyoming craton, can be divided based on textural criteria into tectonite and cumulate groups. The tectonites consist
Abidin, M.S.Z., Codemard, C.A., Dupriez, P., Farrell, C., Jeong, Y., Ji, J., Maran, J.-N., Nilsson, J., Payne, D.N., Richardson, D.J., Sahu, J.K., Yoo, S.   +11 more
core   +2 more sources