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The Mesozoic Welding Process between South and North Dabie Blocks:An Evidence from Pb Isotopes of Yanshanian Granites
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作者 WANG Qiang ZHAO Zhenhua +2 位作者 qiu jiaxiang WANG Renjing LIU Yuanjun 《资源环境与工程》 2016年第B04期129-130,共2页
The Pb isotope compositions of K-feldspar in granites is paid more and more geologists'attention,due to their importance of tracer.It is a fact that South Dabie Block(SDB)and North Dabie Block(NDB)had exited since... The Pb isotope compositions of K-feldspar in granites is paid more and more geologists'attention,due to their importance of tracer.It is a fact that South Dabie Block(SDB)and North Dabie Block(NDB)had exited since Indosinian epoch(Wang et al.,1992;Cong et al,1994;Zhai et al.,1995;Chen et al.1995;Zhang et al,1996,Wang et al,1997).However,the welding process between SDB 展开更多
关键词 Pb The Mesozoic Welding Process between South and North Dabie Blocks
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The recognition of adakite-type gneisses in the North Dabie Mountain and its implication to ultrahigh pressure metamorphic geology 被引量:12
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作者 WANG Qiang XU Jifeng +6 位作者 WANG Jianxin ZHAO Zhenhua WANG Renjing qiu jiaxiang XIONG Xiaolin SANG Longkang PENG Lianhong 《Chinese Science Bulletin》 SCIE EI CAS 2000年第21期1927-1933,共7页
Adakite is an igneous rock generated by the partial melting of subducting ocean slab in an island arc setting. Meanwhile, residuals of the slab-melting are transformed to eclogite or garnet-amphibolite during a slab s... Adakite is an igneous rock generated by the partial melting of subducting ocean slab in an island arc setting. Meanwhile, residuals of the slab-melting are transformed to eclogite or garnet-amphibolite during a slab subduction process. This note reports the adakite-type grey gneisses discovered in the North Dabie Mountain. These adakitic rocks are characterized by high AI2O3(14.97%-17.56%), Sr (545-941 μg/g), Sr/Y (44.71-218.98), La/Yb (16.70-97.50), and low Y (3.32-12.19μg/g), Yb (0.31-1.34 μg/g), Sc (0.92-4.2μg/g), as well as positive Sr anomaly but absent or positive Eu anomaly. They are different from the low aluminum grey gneisses with low AI2O3 (13.73%-14.38%), Sr (262-409 μg/g), Sr/Y (6.46-15.97) and La/Yb (1.90-22.60), high Y(21.79-36.24 μg/g), Yb (2.00-5.59 μg/g) , Sc (8.30%-12.70%), and negative Sr, Eu anomaly in the North Dabie Mountain. The adakite-type grey gneisses in the North Dabie Mountain were most probably formed by the partial melting of subducting ocean slab before the 展开更多
关键词 adakite-type grey GNEISSES ultrahigh pressure METAMORPHISM DABIE MOUNTAIN geochemistry tectonic setting.
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