Geochemical characteristics of cretaceous mafic dikes from Northern Guangdong, SE China: Age, origin and tectonic significance

1998 ◽  
pp. 405-419 ◽  
Author(s):  
Xian-hua Li ◽  
Malcolm T. McCulloch
Keyword(s):  
Geochemical Characteristics ◽  
Tectonic Significance ◽  
Se China ◽  
Northern Guangdong

Zircon SHRIMP U-Pb dating, geochemical characteristics and tectonic significance of granitic gneisses in Amdo, Tibet

2014 ◽  
Vol 25 (3) ◽  
pp. 473-485 ◽  
Author(s):  
Lu Lu ◽  
Zhenhan Wu ◽  
Zhen Zhao ◽  
Daogong Hu ◽  
Peisheng Ye
Keyword(s):  
Geochemical Characteristics ◽  
Tectonic Significance

REE geochemical characteristics of the No. 302 uranium deposit in northern Guangdong, South China

2007 ◽  
Vol 26 (4) ◽  
pp. 425-433 ◽  
Author(s):  
Guoquan Zhang ◽  
Ruizhong Hu ◽  
Xianwu Bi ◽  
Haisheng Feng ◽  
Pengqiang Shang ◽  
...  
Keyword(s):  
South China ◽  
Uranium Deposit ◽  
Geochemical Characteristics ◽  
Northern Guangdong

Two subgroups of A-type granites in the coastal area of Zhejiang and Fujian Provinces, SE China: age and geochemical constraints on their petrogenesis

2004 ◽  
Vol 95 (1-2) ◽  
pp. 227-236 ◽  
Author(s):  
Jian-Sheng Qiu ◽  
De-Zi Wang ◽  
Brent I. A. McInnes ◽  
Shao-Yong Jiang ◽  
Ru-Cheng Wang ◽  
...  
Keyword(s):  
Magma Chamber ◽  
Late Cretaceous ◽  
Coastal Area ◽  
Fractional Crystallisation ◽  
Geochemical Characteristics ◽  
Crustal Rocks ◽  
Isotopic Compositions ◽  
Geochemical Constraints ◽  
Se China ◽  
Highly Evolved

ABSTRACTLate Cretaceous (90–100 Ma) A-type granites are widespread in the coastal area of the Zhejiang and Fujian Provinces, SE China. According to mineralogical and geochemical characteristics, the A-type granites in this belt can be further divided into aluminous and peralkaline subgroups. The aluminous subgroup often contains aluminous-rich minerals (e.g. spessartine and Mn-rich muscovite), while the peralkaline subgroup usually contains riebeckite, arfvedsonite and aegirine. Geochemically, the aluminous A-type granites show lower Nb, Zr, Ga, Y and REE abundances, and lower FeO*/MgO and Ga/Al than the peralkaline subgroup. When they occur in the same area, the two subgroups of A-type granites display quite similar initial Nd isotopic compositions, which are indicative of mixing of ancient basement crustal rocks with variable amounts of mantle materials. Integrated geological and geochemical investigations indicate that both the aluminous and the peralkaline magmas are highly evolved and reflect the residual liquids left after high degrees of fractional crystallisation in a deep magma chamber. The present authors suggest that the mineralogical and geochemical differences between the aluminous and peralkaline subgroups are likely to have been generated via different differentiation paths controlled by varying fluorine contents of the parent magmas.

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