Chinese Journal of GEOCHEMISTRY

(ISSN 1000-9426)

Vol. 29, No. 4, November 2010

CONTENTS

Geochemical characteristics of island-arc volcanic rocks in the Nan-Nam Pat-Phetchabun zone, northern Thailand …………………………………………………………………………………………………………SHEN Shangyue et al. (337)

Mineralogy and radioactivity of pegmatites from South Wadi Khuda area, Eastern Desert, Egypt ……Mohamed F. Raslan et al. (343)

Geochemical characteristics of the Xuanwei Formation in West Guizhou: Significance of sedimentary environment and mineralization ………………………………………………………………………………… ZHANG Zhengwei et al. (355)

Batch and column experiments to support heavy metals (Cu, Zn and Mn) in alluvial sediments …………………………Dişli E. (365)

Group classification of mixed oils in central Junggar Basin, Northwest China and their migration ……… WANG Xulong et al. (375)

Ocellar lamprophyre dyke bearing mineralization, Wadi Nugrus, Eastern Desert, Egypt: Geology, Mineralogy and geochemical implications ……………………………………………………………………………… Ibrahim M.E. et al. (383)

Fractal kinetic characteristics for dissolving and leaching processes of strontium residue …………………… XU Longjun et al. (393)

Evaluation of hydrogeochemical characteristics of groundwater in parts of the lower Benue Trough, Nigeria ……………………………………………………………………………………………………………Nganje T.N. et al. (398)

Endogenic Au-Ag polymetallic ore deposits and ore-bearing potentiality of strata ………………………… WANG Baode et al. (407)

Differences in uptake and distribution patterns between zinc and cadmium in Vicia villosa…PIAO Hechun and LIU Congqiang (416)

Fluid inclusion evidence for petroleum accumulation in northern Qaidam Basin ………………………… YANG Yunfenget al. (422)

Physical and chemical changes of water in the deep interior of the Earth―Decrepitation-style mud-volcano-earthquake―A bright lamp to shed light on the mysteries of the deep interior of the Earth …………………………… ZENG Mingguo (431)

Laser probe 40Ar/39Ar dating for quartz from auriferous quartz veins in the Shihu gold deposit, western Hebei Province, North China……………………………………………………………………………………………………CAO Ye et al. (438)

Origin and evolution of oilfield brines from Tertiary strata in western Qaidam Basin: Constraints from　87Sr/86Sr, δD, δ18O, δ34S and water chemistry

…………………………………………………………… FAN Qishun et al. (446)

“Giant pressure shadow” structure and ore-finding method of tectonic stress field in the Tongchang Cu-Au polymetallic orefield,　Shaanxi, China: II. Dynamics of tectonic ore-forming processes and prognosis of concealed ores … HAN Runsheng et al. (455)

Nitrogen cycle model of agroecosystem in the karst region of Guizhou Province………………………CHEN Ye and LIAN Bin (464)