Zobrazeno 1 - 10
of 18
pro vyhledávání: '"W. K. Fletcher"'
Autor:
W. K. Fletcher, Zhangshuan Hou
Publikováno v:
Geochemistry: Exploration, Environment, Analysis. 5:215-221
Although previous studies have indicated the importance of flood events in the mobilization, transport and deposition of gold by streams, there have been no estimates of actual transport rates of sediment and gold as discharge varies both within and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::deedde8f184c7458a2256115df2c5bf8
https://doi.org/10.1144/1467-7873/03-037
https://doi.org/10.1144/1467-7873/03-037
Autor:
J. Hobday, W. K. Fletcher
Publikováno v:
Geochemistry: Exploration, Environment, Analysis. 3:73-78
Because of the high costs and difficult logistics of geochemical surveys in remote regions, sediments collected from large streams must often suffice to determine the presence or absence of mineralization. Here we study this problem in Slesse Creek,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fe57a58a8b03c12d2aaf03da75ded80d
https://doi.org/10.1144/1467-787302-046
https://doi.org/10.1144/1467-787302-046
Autor:
Columbia Vancouver, W. K. Fletcher
Publikováno v:
Bulletin of the Geological Society of Malaysia. 40:57-69
This paper summarises and reviews some detailed orientation surveys, case histories and experimental studies of the behaviour of cassiterite and gold in streams in SE Asia as a basis for recommendations on the design and interpretation of exploration
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1218166fb681ee8d73c88d40329cc821
https://doi.org/10.7186/bgsm40199706
https://doi.org/10.7186/bgsm40199706
Publikováno v:
Water Resources Research. 27:2941-2951
Mobile fine sediment was caught in six screened pit traps installed in the bed of a cobble gravel channel. Sample periods lasted from several hours to several days, so the trapped material represents a good integration of the range of sizes in tracti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7b0e15465af53833ab751aafd6654b0d
https://doi.org/10.1029/91wr01622
https://doi.org/10.1029/91wr01622
Autor:
Stephen J. Cook, W. K. Fletcher
Publikováno v:
Economic Geology. 87:1677-1679
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::41d3e6498a1be3a6a7dcab176394b1cb
https://doi.org/10.2113/gsecongeo.87.6.1677
https://doi.org/10.2113/gsecongeo.87.6.1677
Autor:
W. K. Fletcher, S. J. Day
Publikováno v:
SEPM Journal of Sedimentary Research. 61
A model is presented for placer formation at the grain, bar (10-100 m) and reach scales (> 1000 m) in gravel-bed streams. The model is based on the processes of erosion and re-deposition of the bed during annual flood events and uses Einstein's bedlo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a26ed8bf7fc93ba870a93eae58da653b
https://doi.org/10.1306/d42677f3-2b26-11d7-8648000102c1865d
https://doi.org/10.1306/d42677f3-2b26-11d7-8648000102c1865d
Autor:
W. K. Fletcher, M. A. Olade
Publikováno v:
Economic Geology. 71:733-748
Trace element content of more than 1,500 bedrock samples from the vicinity of the Valley Copper, Bethlehem-JA, Lornex, and Highmont porphyry copper deposits in the Highland Valley of British Columbia has been investigated. Chemical variations in fres
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a83d40987b1da3c053bc64fe6d3ce71e
https://doi.org/10.2113/gsecongeo.71.4.733
https://doi.org/10.2113/gsecongeo.71.4.733
Publikováno v:
Canadian Journal of Animal Science. 60:991-1002
Concentrations of Mo, Cu, Zn, Mn, Fe, N, Ca, P, Mg and K were determined in native and introduced grasses and legume forages from throughout northwestern Manitoba. Nutrient concentrations were compared with minimum requirements of cattle suggested by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a4e5426c6b9a35573c79bd04e72bf5ed
https://doi.org/10.4141/cjas80-117
https://doi.org/10.4141/cjas80-117
Autor:
W. K. Fletcher, D. A. Grieve
Publikováno v:
Canadian Journal of Earth Sciences. 13:1683-1693
Co, Cu, Fe, Mn, Ni, Pb, and Zn, together with sand content and loss of ignition, have been determined for surflcial sediments from the Fraser River delta-front and upper foreslope. Both geochemical maps and statistical analysis disclose close relatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c7ca62f116eb4b710d3ce04914114bc0
https://doi.org/10.1139/e76-178
https://doi.org/10.1139/e76-178