Mesozoic lithosphere destruction beneath the North China Craton: evidence from major-, trace-element and Sr–Nd–Pb isotope studies of Fangcheng basalts

2002 ◽  
Vol 144 (2) ◽  
pp. 241-254 ◽  
Author(s):  
Hong-Fu Zhang ◽  
Min Sun ◽  
Xin-Hua Zhou ◽  
Wei-Ming Fan ◽  
Ming-Guo Zhai ◽  
...  
Keyword(s):  
Trace Element ◽  
North China Craton ◽  
North China ◽  
Pb Isotope ◽  
The North ◽  
Isotope Studies

scholarly journals Geochemistry and tectonic significance of late Paleoproterozoic A-type granites along the southern margin of the North China Craton

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Yan Wang ◽  
Yi-Zeng Yang ◽  
Wolfgang Siebel ◽  
He Zhang ◽  
Yuan-Shuo Zhang ◽  
...  
Keyword(s):  
North China Craton ◽  
North China ◽  
Published Data ◽  
Pb Isotope ◽  
Granite Sample ◽  
The North ◽  
Southern Margin ◽  
Basement Rocks ◽  
Type Granite ◽  
Melting Product

AbstractThe Longwangzhuang pluton is a typical example of Paleoproterozoic A-type granite intrusions at the southern margin of the North China Craton. This pluton is composed of arfvedsonite granite and minor aegirine–augite granites. Samples from both granite types display similar zircon U-Pb ages with 207U-206Pb ages of 1612 ± 19 Ma [mean square weighted deviation (MSWD) = 0.66] and 1609 ± 24 Ma (MSWD = 0.5), respectively. The granites exhibit similar high silica (SiO2 = 71.1–73.4 wt.%), high alkaline (Na2O + K2O = 8.10–9.26 wt.%, K2O/Na2O > 1), and low Al2O3 (11.8–12.8 wt. %) contents and metaluminous to weakly peraluminous bulk chemistry. The chemical variations of the Longwangzhuang pluton suggest the effects of mineral fractionation. In addition, all samples show typical characteristics of A-type granites, such as high 10000Ga/Al ratios (4.10–7.28), high FeOtot/(FeOtot + MgO) ratios (0.88–0.99), and high Zr (484–1082 ppm), Ce (201–560 ppm), and Y (78–156 ppm) contents. The εNd(t) values and the (206Pb/204Pb)t, (207Pb/204Pb)t, and (208Pb/204Pb)t ratios of the arfvedsonite granite samples vary from −4.6 to –5.3, 15.021 to 17.349, 15.241 to 15.472, and 33.206 to 36.905, respectively, and those for the aegirine–augite granite sample amount at −0.2, 14.421, 15.175, and 33.706. The distinct and variable Nd and Pb isotope values indicate the presence of heterogeneous protoliths. Based on its geochemistry, its low initial Pb isotope ratios, and its enrichment in Nd isotopes, we infer that the Longwangzhuang A-type granite is the partial melting product of basement rocks such as the Taihua Group gneisses accompanied by some involvement of juvenile material from the mantle. Together with published data from other Paleoproterozoic A-type granite plutons exposed at the southern margin of the craton, our findings suggest that these granites had a similar origin. Furthermore, geochemically, they can be divided into two groups: A2-type, which formed earlier (~1.8–1.6 Ga), and A1-type, which formed later (~1.6–1.5 Ga). Combining this information with the variations in whole-rock Nd and zircon Hf isotopic composition at ca. 1.6 Ga, we propose that tectonic transformation from post-orogenic to anorogenic magmatism occurred at the southern margin of the North China Craton at that time.

Heterogeneous Pb isotope composition in the Archean lower crust of the North China Craton induced by Cenozoic basaltic magma underplating

2016 ◽  
Vol 125 ◽  
pp. 71-86 ◽  
Author(s):  
Yu-Lin Zhang ◽  
Hong-Fu Zhang ◽  
Zhi-An Bao ◽  
M. Santosh ◽  
Hong-Lin Yuan
Keyword(s):  
North China Craton ◽  
Lower Crust ◽  
North China ◽  
Isotope Composition ◽  
Basaltic Magma ◽  
Pb Isotope ◽  
The North

Genesis of the stratiform Zhenzigou Pb Zn deposit in the North China Craton: Rb Sr and C O S Pb isotope constraints

2016 ◽  
Vol 79 ◽  
pp. 88-104 ◽  
Author(s):  
Yu-Bo Ma ◽  
Leon Bagas ◽  
Shu-Wen Xing ◽  
Shou-Ting Zhang ◽  
Rui-Jiang Wang ◽  
...  
Keyword(s):  
North China Craton ◽  
North China ◽  
Pb Isotope ◽  
The North

scholarly journals Supplemental Material: Identification of Jurassic mafic arc magmatism in the eastern North China Craton: Geochemical evidence for westward subduction of the Paleo-Pacific slab

2020 ◽  
Author(s):  
Wei Fang ◽  
Li-Qun Dai ◽  
et al.
Keyword(s):  
Trace Element ◽  
North China Craton ◽  
North China ◽  
Hf Isotope ◽  
Arc Magmatism ◽  
Pb Isotope ◽  
Material Identification ◽  
Geochemical Evidence ◽  
Pacific Slab

Table S1: Major and trace element compositions of lamprophyres from the eastern North China Craton; Table S2: Whole-rock Sr, Nd, and Hf isotope compositions of lamprophyres from the eastern North China Craton; Table S3: LA-ICPMS Zircon U-Pb isotope compositions of lamprophyres from the eastern North China Craton; Table S4: Zircon LA-MC-ICPMS Lu-Hf isotope compositions of lamprophyres from the eastern North China Craton.

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