Environmental baseline evaluation of lead in shallow groundwater based on statistical and spatial outlier identificationSpringer Science and Business Media LLC - Tập 34 - Trang 416-421 - 2015
Linhua Sun
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...... hiện toàn bộ
Determination of naphthenic acids in crude oil by chemical ionization mass spectrometrySpringer Science and Business Media LLC - Tập 24 - Trang 67-72 - 2005
Zhenbo Lü, Songbai Tian, Yuchun Zhai, Yi Ding, Lihong Zhuang
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...... hiện toàn bộ
A study on A-type granites in Suzhou, ChinaSpringer Science and Business Media LLC - Tập 7 - Trang 29-45 - 1988
Zhang Xinglong, Wang Jiabing, Shen Bochun
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 ...... hiện toàn bộ
Geochronology of and Nd-Sr-Pb isotopic evidence for mantle source in the ancient subduction zone beneath Sanshui Basin, Guangdong Province, ChinaSpringer Science and Business Media LLC - - 1989
Zhu Bingquan, Wang HuiFen, Mao Cunxiao, Zhu Nai Juan, Huang Rongsheng, Peng Jianhua, Pu Zhiping
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...... hiện toàn bộ
Ore-forming solution and genesis of a rock crystal deposit in south Hunan, indicated by fluid inclusion studiesSpringer Science and Business Media LLC - Tập 1 - Trang 387-408 - 1982
Shulin Zhang
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
...... hiện toàn bộ
The source system of Mesozoic magmatism in Middle and Lower Yangtze Valleys and adjacent Areas—a geochemical tracer studySpringer Science and Business Media LLC - Tập 16 - Trang 105-111 - 1997
Ma Zhendong, Shan Guangxiang
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...... hiện toàn bộ