Details

Autor(en) / Beteiligte

• LING Hongfei
• SHEN Weizhou
• DENG Ping
• JIANG Shaoyong
• JIANG Yaohui
• YE Haimin
• PU Wei
• TAN Zhengzhong

Titel

Geochemical Characteristics and Genesis of the Luxi-Xianrenzhang Diabase Dikes in Xiazhuang Uranium Orefield, Northern Guangdong Province

Ist Teil von

• 地质学报（英文版）, 2005, Vol.79 (4), p.497-506

Ort / Verlag

Research Institute No. 290,CNNC,Shaoguan,Guangdong 512026

Erscheinungsjahr

2005

Link zum Volltext

Quelle

Wiley Online Library

Beschreibungen/Notizen

• P5; The Luxi-Xianrenzhang diabase dikes were emplaced into the eastern part of the Guidong composite granitoids in northern Guangdong Province at the end of the Early Cretaceous.They show tholeiitic features,enrichment in large ion lithophile elements,slight enrichment in light rare earth elements,depletion in Zr and Hf,and basically no depletion in Nb and Ta and no Eu anomaly.They are similar to intraplate basalt in terms of trace element characteristics.They have high εNd(t) values (3.6-4.9),initial 87Sr/86Sr ratios (0.70530-0.70641) and δ18O values and Dupal anomaly of Pb isotope compositions.Their Sr-Nd,Pb-Sr,Pb-Nd and Pb-Pb isotopes plot between DMM and EMⅡ,with Pb similar to EMⅡ,Nd relatively close to DMM and Sr in between.This profile suggests that the diabase dikes studied were derived from partial melting of a mantle source that had been subjected to metasomatism by fluids originated from a subduction zone under a tectonic environment of crustal extension and lithosphere thinning in the late Yanshanian.