Zobrazeno 1 - 9
of 9
pro vyhledávání: '"L P, Knauth"'
Autor:
Everett L. Shock, Zachary D. Sharp, Viorel Atudorei, Sukanya Sengupta, Andreas Pack, O. Maltsev, L. P. Knauth, J. A. Gibbons
Publikováno v:
Geochimica et Cosmochimica Acta. 186:105-119
It is now recognized that variations in the Δ17O of terrestrial materials resulting from purely mass dependent fractionations, though small, have geological significance. In this study, the δ18O and δ17O values of selected low temperature quartz a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::884b57a7565928695517d2ae63b53eb2
https://doi.org/10.1016/j.gca.2016.04.047
https://doi.org/10.1016/j.gca.2016.04.047
Publikováno v:
Journal of Volcanology and Geothermal Research. 177:755-759
Before base surges were described in association with nuclear blasts and explosive volcanic eruptions (especially, the 1980 eruption of Mount St. Helens, Washington), laminar and cross-bedded volcanogenic surge deposits were commonly misinterpreted a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c6c9a9c02ce1eaf7e585ed8fce0fcf63
https://doi.org/10.1016/j.jvolgeores.2008.01.044
https://doi.org/10.1016/j.jvolgeores.2008.01.044
Autor:
N, Hoffman, L P, Knauth, S, Klonowski, D, Burt, R S, Saunders, R W, Zurek, P T, Doran, S L, Forman
Publikováno v:
Science (New York, N.Y.). 290(5492)
In their report “Evidence of recent groundwater seepage and surface runoff on Mars” (30 June, p. [2330][1]), Malin and Edgett propose that the seepage and flow of water may have occurred on Mars in the recent geologic past, on the basis of the ob
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b6c75ca7873eb95730caee8cfec30b48
https://pubmed.ncbi.nlm.nih.gov/17780509
https://pubmed.ncbi.nlm.nih.gov/17780509
Autor:
L. P. Knauth, Donald M. Burt
Publikováno v:
Journal of Geophysical Research. 108
If Mars ever possessed a salty liquid hydrosphere, which later partly evaporated and froze down, then any aqueous fluids left near the surface could have evolved to become dense eutectic brines. Eutectic brines, by definition, are the last to freeze
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::71771c646a81444aeda17271c5cf765b
https://doi.org/10.1029/2002je001862
https://doi.org/10.1029/2002je001862
Autor:
L P, Knauth
Publikováno v:
Nature. 395(6702)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::5fbcfb3dc30fdf46d6b74c0d5cc02882
https://pubmed.ncbi.nlm.nih.gov/11542867
https://pubmed.ncbi.nlm.nih.gov/11542867
Publikováno v:
Science (New York, N.Y.). 290(5492)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::8cfb053d51cb1656292606278f87d430
https://pubmed.ncbi.nlm.nih.gov/11184197
https://pubmed.ncbi.nlm.nih.gov/11184197
Autor:
L. P. Knauth, Donald R. Lowe
Publikováno v:
The Journal of Geology. 85:699-723
Strata of the upper part of the Onverwacht Group (3.4 b.y.), Transvaal, South Africa, are composed mainly of chert representing silicified quartz-poor volcaniclastic detritus. Layers of carbonate, silicified carbonate, volcaniclastic debris, and poss
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::33a227338751b9dd4ab9ceb397646467
https://doi.org/10.1086/628358
https://doi.org/10.1086/628358
Autor:
Donald R. Lowe, L. P. Knauth
Publikováno v:
SEPM Journal of Sedimentary Research. 48
Sand-sized spheroids in the 3.4 billion-year old Onverwacht Group, South Africa, previously interpreted as silicified marine carbonate ooids, were constructed of loose volcanic dust and ash and closely resemble accretionary lapilli found in younger v
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8c0cc3d5dde1d9da691724fd6a2dd631
https://doi.org/10.1306/212f7545-2b24-11d7-8648000102c1865d
https://doi.org/10.1306/212f7545-2b24-11d7-8648000102c1865d
Autor:
D. L. Jones, L. P. Knauth
Publikováno v:
SEPM Journal of Sedimentary Research. 49
O18 values for 73 chert samples from the Arkansas Novaculite (Devonian-Mississippian) range from + 17.8 to 33.7. Much of this variation is related to the effects of local metamorphism and isotopic impurities such as detrital quartz and clay minerals.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d7e5e443834e24a45050952869395d56
https://doi.org/10.1306/212f7798-2b24-11d7-8648000102c1865d
https://doi.org/10.1306/212f7798-2b24-11d7-8648000102c1865d