KSIĄŻKI POWIĄZANE ZE SŁOWEM «AUTHIGENIC»
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1
Microfacies of Carbonate Rocks: Analysis, Interpretation and ...
Authigenic quartz and feldspars are usually re- stricted to micritic limestones.
Authigenic feldspars Idiomorphic crystals, euhedral outline, carbonate inclusions
and specific optical criteria are characteristic for authigenic feldspars.
2
Processes on the Early Earth
Histogram of δ34S values in individual authigenic sulfide minerals from the
Ventersdorp Contact Reef and its related rocks. Py—pyrite, Po—pyrrhotite, Sph—
sphalerite, Cpy—chalcopyrite, Ga—galena. types such as lavas, Ventersdorp ...
W. U. Reimold, Roger Lawrence Gibson,
2006
3
U-Th Series Nuclides in Aquatic Systems
Radiotracer approaches feature prominently in attempts to refine models of
sediment mixing (Martin and Sayles, 2003). The tendency for uranium to
precipitate in marine sediments under reducing conditions has led to the use of
authigenic U ...
4
Geological Survey Professional Paper
Potassium feldspar occurs in the equation for boron in western wheatgrass and
big sagebrush. Boron is thought to reside in authigenic potassium feldspars in
the Green River and Uinta Formations (Sheppard and Gude, 1973). The boron ...
Geological Survey (U.S.),
1986
5
New Frontiers in Dead Sea Paleoenvironmental Research
238or234U = 238 or 234U − 238 or 234U authigenic total detrital , (3) 232Th =
232Th + 232Th total detrital authigenic , (4) 230Th* = 230Th − 230Th − 230Th , (5
) total detrital excess where 230Th* refers to the 230Th accumulated in the ...
Yehouda Enzel, Amotz Agnon, Mordechai Stein,
2006
6
U.S. Geological Survey Professional Paper
Authigenic phases observed in fine-grained sandstones are predominantly
carbonate minerals (fig. 6 ). Authigenic carbonate cements also are most
common in the coarser grained sandstones, particularly those that have high
concentrations ...
a negligible authigenic fraction, and it was assumed that for these sediments Ct∼
Cd. The data for the composition of the grey clays, which are therefore
representative of the detrital fraction of deep-sea sediments, are given in Table
16.2(a) ...
Roy Chester, Tim D. Jickells,
2012
8
Proceedings of the Estonian Academy of Sciences, Geology
In some cases overgrowths were bigger than the initial grain or surrounded
several grains (Fig. 4, 12). Relatively thick overgrowths occurred in sandstones.
Sometimes, especially in dolomite-cemented sand- and siltstones, the authigenic
rim ...
Dibble & Tiller (1981) proposed a kinetic model for the formation of authigenic
silicates in tuffaceous rocks. The model incorporates the idea that rates of glass
dissolution proceed at much greater rates than stable authigenic minerals, such
as ...
William Alexander Deer, Robert Andrew Howie,
2004
10
The Oceanic Lithosphere
Introduction Authigenic1 silicates are widespread in deep-sea sediments. The
most commonly observed and suggested diagenetic2 reactions responsible for
the formation of authigenic silicates in the deep-sea environment are
summarized in ...
WIADOMOŚCI, KTÓRE ZAWIERAJĄ SŁOWO «AUTHIGENIC»
Sprawdź, o czym dyskutuje się w prasie krajowej i zagranicznej oraz jak jest stosowane słowo
authigenic w wiadomościach.
New Geosphere papers from The Geological Society of America
... the enhanced biologic activity, seafloor deformation associated with gas hydrate formation and decomposition, and the addition of authigenic ... «EurekAlert, Mar 15»
Ignyta's (RXDX) CEO Jonathan Lim on Q4 2014 Results - Earnings …
We are very excited about the potential of RXDX-105, across multiple tumor types in authigenic driver alterations with a potential for ... «Seeking Alpha, Mar 15»
Study suggests new pathway for phosphorous cycling in …
The researchers looked at authigenic phosphorous pools—phosphorous that precipitates as a mineral—and iron oxide-bound phosphorous ... «Phys.Org, Lut 15»
Drought, Population Growth Led to Decline of Neo-Assyrian Empire
"Stable oxygen isotope data obtained from authigenic calcites of Lake Zeribar in the central Zagros Mountains of western Iran also indicate that ... «AINA, Lis 14»
Rock-dwelling microbes remove methane from deep sea
This is an active methane seep with sulfide-oxidizing chemosynthetic mussels colonizing authigenic carbonates exposed at the seabed. Credit: ... «Phys.Org, Paz 14»
Tasmania, Western North America were Once Neighbors, Finds …
Authigenic monazite and detrital zircon dating from the Proterozoic Rocky Cape Group, Tasmania: Links to the Belt-Purcell Supergroup, North ... «Sci-News.com, Sie 14»
COMMUNITY VOICES | PolyMet supporters spread misinformation …
... bioavailability since they can be important scavengers of Hg (II), and mercury can coprecipitate with authigenic pyrite in marine sediments. «Twin Cities Daily Planet, Cze 14»
Correlating planetary atmospheric patterns and sediment deposition
Authigenic sediments, such as phosphorite and glauconite, are sparse. They are found north of the biogenic sediment zone and often on the eastern side of the ... «Offshore Oil and Gas Magazine, Sty 12»
Finding off-structure geopressured gas accumulations in the US Gulf
Zoning of authigenic cements is observed with poly-crystalline quartz/pyrite cement predominate updip and most proximal to the expansion fault. This authigenic ... «Offshore Oil and Gas Magazine, Sty 12»
0.144 Leagues Under the Sea
The plan for Alvin Dive 4636 was ambitious: deploy four experiments and collect eight authigenic carbonates, four Niskin bottles of water, ... «New York Times, Sie 10»