LONG TERM ROCK WEATHERING AND EROSION DRIVEN BY SUBCRITICAL CRACKING

2018 ◽  
Author(s):  
Martha Cary Eppes ◽  
◽  
Gregory S. Hancock ◽  
Xiaofeng Chen
Keyword(s):  
Rock Weathering ◽  
Subcritical Cracking

Long-term monitoring of waste-rock weathering at the Antamina mine, Peru

Chemosphere ◽  
2019 ◽  
Vol 215 ◽  
pp. 858-869 ◽  
Author(s):  
Bas Vriens ◽  
Holly Peterson ◽  
Laura Laurenzi ◽  
Leslie Smith ◽  
Celedonio Aranda ◽  
...  
Keyword(s):  
Waste Rock ◽  
Rock Weathering ◽  
Long Term Monitoring ◽  
Term Monitoring

scholarly journals Rates of subcritical cracking and long-term rock erosion

Geology ◽  
2018 ◽  
Author(s):  
M.C. Eppes ◽  
G.S. Hancock ◽  
X. Chen ◽  
J. Arey ◽  
T. Dewers ◽  
...  
Keyword(s):  
Subcritical Cracking

scholarly journals Composition and Structure of Phosphate-Rich Parietal Crusts and Nodules in Monte Corchia Cave, Alpi Apuane (Central Italy)

2021 ◽  
Vol 9 ◽  
Author(s):  
Leonardo Piccini ◽  
Alessia Nannoni ◽  
Pilario Costagliola ◽  
Mario Paolieri ◽  
Chiara Vigiani
Keyword(s):  
Central Italy ◽  
Chemical Deposition ◽  
Chemical Precipitation ◽  
Rock Weathering ◽  
Cave System ◽  
Composition And Structure ◽  
The World ◽  
Cave Environment ◽  
The Common

Cave environment allows long-term processes of rock weathering and chemical deposition that cannot occur on Earth surface directly exposed to meteoric and external biochemical agents. Apart from the common carbonate speleothems, chemical precipitation from infiltration water can also produce phosphate-rich formations usually occurring as parietal dark crusts or spheroidal nodules. Despite the potential purposes of these kind of deposits as paleoenvironmental proxies, they have been still poorly investigated by cave scientists. Monte Corchia cave (NW Tuscany, Central Italy) is one of the most studied caves in the world, particularly for paleoclimate reconstructions from calcite speleothems. Several samples of parietal formations were collected in relict phreatic and epiphreatic passages at different altitudinal levels that reflect different evolutionary stages of this large cave system. Samples were analyzed by diffractometry and SEM-EDS possibly revealing the occurrence of hydroxyapatite or fluorapatite mixed with Fe/Mn incrustations and allogenic clastic particles. Crusts often cover the entire section of relict phreatic or epiphreatic passages and can be related to precipitation during waterfilled phases. Phosphate nodules are almost entirely composed by hydroxyapatite or fluoroapatite and could be the result of long-term chemical (or bio-chemical) precipitation in air-filled environments.

scholarly journals Issues and options in high country farming 4. Cycling nutrients for sustainable management

1996 ◽  
pp. 153-159
Author(s):  
K.F. O'Connor ◽  
A.H. Nordmeyer
Keyword(s):  
Organic Matter ◽  
Nutrient Cycling ◽  
Sustainable Management ◽  
Open Systems ◽  
Grazing Management ◽  
Rock Weathering ◽  
Supporting Capacity ◽  
Nutrient Balances

Nutrient balances are recognised as the key to understanding the environmental context for sustainable management in pastorally used mountain lands and for monitoring possible effects of pastoral practices on the life-supporting capacity of soil. The paper draws on a larger survey of recent and current soil fertility research in the high country to examine briefly, three themes in nutrient cycling. The role of nutrient accessions to open systems is recognised for improved range. Current long-term revegetation studies show the need to take account of income from rock weathering. The importance of understanding the role of different plant species, soil amendments and pastoral practices in activating or impeding nutrient cycling proper is indicated from recent studies involving monitoring of exchangeable aluminium, comparing lupins with other legumes and studying the effects of planted conifers on the mineralisation of grassland organic matter. The dimensions and magnitudes of grazing-induced -nutrient-transfers-are-outlined-in-relation-to-their. risks of loss from periodic hydrologic events, as well as recognising the roles of pasture improvement and grazing management in accelerating nutrient cycling. Keywords: aluminium, grazing transfers, mineralisation of organic matter, nutrient balances, nutrient cycling, rock weathering, sustainable management

Therapy and prevention for mental health: What if mental diseases are mostly not brain disorders?

2019 ◽  
Vol 42 ◽  
Author(s):  
John P. A. Ioannidis
Keyword(s):  
Mental Health ◽  
Mental Disease ◽  
Brain Disorders ◽  
Social Stressors ◽  
Labor Education ◽  
Mental Diseases ◽  
Long Term Follow Up ◽  
Political Decisions

AbstractNeurobiology-based interventions for mental diseases and searches for useful biomarkers of treatment response have largely failed. Clinical trials should assess interventions related to environmental and social stressors, with long-term follow-up; social rather than biological endpoints; personalized outcomes; and suitable cluster, adaptive, and n-of-1 designs. Labor, education, financial, and other social/political decisions should be evaluated for their impacts on mental disease.

Conceptual short-term memory (CSTM) supports core claims of Christiansen and Chater

2016 ◽  
Vol 39 ◽  
Author(s):  
Mary C. Potter
Keyword(s):  
Working Memory ◽  
Rapid Serial Visual Presentation ◽  
Language Comprehension ◽  
Short Term Memory ◽  
Visual Presentation ◽  
Long Term Memory ◽  
Short Term ◽  
Term Memory ◽  
Use Of Knowledge

AbstractRapid serial visual presentation (RSVP) of words or pictured scenes provides evidence for a large-capacity conceptual short-term memory (CSTM) that momentarily provides rich associated material from long-term memory, permitting rapid chunking (Potter 1993; 2009; 2012). In perception of scenes as well as language comprehension, we make use of knowledge that briefly exceeds the supposed limits of working memory.

Brief summary of Kleť photographic search programme for minor planets

1999 ◽  
Vol 173 ◽  
pp. 189-192
Author(s):  
J. Tichá ◽  
M. Tichý ◽  
Z. Moravec
Keyword(s):  
Ccd Camera ◽  
Minor Planet ◽  
Minor Planets ◽  
Main Belt

AbstractA long-term photographic search programme for minor planets was begun at the Kleť Observatory at the end of seventies using a 0.63-m Maksutov telescope, but with insufficient respect for long-arc follow-up astrometry. More than two thousand provisional designations were given to new Kleť discoveries. Since 1993 targeted follow-up astrometry of Kleť candidates has been performed with a 0.57-m reflector equipped with a CCD camera, and reliable orbits for many previous Kleť discoveries have been determined. The photographic programme results in more than 350 numbered minor planets credited to Kleť, one of the world's most prolific discovery sites. Nearly 50 per cent of them were numbered as a consequence of CCD follow-up observations since 1994.This brief summary describes the results of this Kleť photographic minor planet survey between 1977 and 1996. The majority of the Kleť photographic discoveries are main belt asteroids, but two Amor type asteroids and one Trojan have been found.

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