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Environmental baseline evaluation of lead in shallow groundwater based on statistical and spatial outlier identification
Springer Science and Business Media LLC - Tập 34 - Trang 416-421 - 2015
A series of methods have been applied for evaluating the environmental
baseline—especially on a regional scale—because of its importance for local
environmental management. However, most of the methods have been statistical in
nature, and spatial variability has not been considered simultaneously. In this
study, the combined use of statistical and spatial methods has been carried out
to analyse le...
Determination of naphthenic acids in crude oil by chemical ionization mass spectrometry
Springer Science and Business Media LLC - Tập 24 - Trang 67-72 - 2005
Naphthenic acids in petroleum are considered a class of biological markers.
Their potential use in source correlation and as an indicator of biodegradation
was reported in the past (Dzidic et al., 1988; Behar and Albrecht, 1984). Due to
their highly complicated properties, detailed characterization of the acids is
difficult. A method based on positive ion CI (chemical ionization) mass
spectrometry...
A study on A-type granites in Suzhou, China
Springer Science and Business Media LLC - Tập 7 - Trang 29-45 - 1988
The Suzhou granite suite is the anorogenic product, which is located on the
inactive continental margin of east China. It was emplaced about 141 Ma ago,
occurring as a stock with a polygonal outline on the surface, belonging to
alkali potash-feldspar granites with K2O > Na2O, Reit’s alkali coefficient =
0.694, SiO2 = 74.95, and Al2O3/(K2O + Na2O)mol= 1. Besides K and Na, Li and Rb
are also rather ...
Geochronology of and Nd-Sr-Pb isotopic evidence for mantle source in the ancient subduction zone beneath Sanshui Basin, Guangdong Province, China
Springer Science and Business Media LLC - - 1989
The available petrochemical data indicate that volcanic rocks in the Sanshui
basin of Guangdong Province are characteristic of the island-arc
tholeiite-calc-alkaline series.Their K-Ar ages range from 43 to 64 Ma,
corresponding to Early Tertiary. The Nd-Sr-Pb isotopic correlations give two
binary mixing trends, indicating a mixed source of Leiqiong depleted mantle,
seawater and altered sediments pe...
Fluid inclusion studies of a new type of ore deposit: Porphyry tungsten occurrence in China
Springer Science and Business Media LLC - - 1985
Ore-forming solution and genesis of a rock crystal deposit in south Hunan, indicated by fluid inclusion studies
Springer Science and Business Media LLC - Tập 1 - Trang 387-408 - 1982
Si, Al, Ca, Mg, Fe, Na, K, CO 3 −2 , F, etc. are detected from the fluid
inclusion leachates. Among these constituents, Si, Na, and CO 3 −2 are
predominant, amounting to more than 80 percent. This indicates that the
ore-forming solution must be alkaline with Si, Na, and CO 3 −2 as its dominant
components. Homogenization temperatures for the solution range from 80 to 360°C.
Although rock quartz can...
The source system of Mesozoic magmatism in Middle and Lower Yangtze Valleys and adjacent Areas—a geochemical tracer study
Springer Science and Business Media LLC - Tập 16 - Trang 105-111 - 1997
The mechanism that controls regional mineralization must be governed by a series
of geochemical reactions in relation to the source system of magmatism. In this
respect, the geological bodies must have been overprinted by various kinds of
tracers in terms of either chemical elements or isotopes. For this reason, the
problem may be better approached by treating the lithosphere as a whole with due
c...
Geochronology of the Dahongshan Group
Springer Science and Business Media LLC - Tập 10 Số 3 - Trang 195-203 - 1991
A new type of micro-disseminated gold deposits in association with diabase found in Yunnan and Guizhou provinces and Guangxi Zhuang Autonomous Region—Their geological characteristics and metallogenic conditions
Springer Science and Business Media LLC - Tập 31 - Trang 449-456 - 2012
With the continuous development of gold ore prospecting and exploration in
recent years a new type of micro-disseminated gold deposits have been found in
the regions of Southwest Guizhou Province and Northwest Guangxi Zhuang
Autonomous Region, with the orebodies directly occurring in diabase or in the
contact zone between diabase and strata. The orebodies are strictly controlled
by fault structure...
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