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cenozoic volcanic rock series in southeastern china——PETROCHEMISTRY

Science in china,Ser.B 1986年第12期29卷 1330-1344页

作者：从柏林张儒瑗 Institute of Geology Academia Sinica Beijing

In this paper, the age, spatial distribution and petrochemistry of cenozoic volcanic rocks of southeastern china are discussed. They are subalkalic and alkalic. Except for the Pleistocene calc-alkalic volcanic rocks of northern Taiwan and the Late Tertiary tholeiitic rocks of Eastern Coastal Range of Taiwan, the alkalic basaltic rocks form the majority. Only alkalic and strongly alkalic basaltic and ultrabasic volcanic rocks occur in the inland to the west of the Haifeng-Zhenghe-Shangyu fracture zone. It follows that the petrochemical nature of the cenozoic volcanics studied exhibits a marked trend of variation with time and space, implying that their formation was obviously controlled by the geotectonic setting.

关键词： Pro PETROCHEMISTRY cenozoic volcanic rock series in southeastern china rock CAB

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cenozoic volcanic rock series in southeastern china (Ⅱ)——TRACE ELEMENT GEOCHEMISTRY

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Science in china,Ser.B 1987年第7期 766-778页

作者：从柏林张儒瑗 Institute of Geology Academia Sinica Beijing

On the premise of the sister paper, the trace element geochemistry of cenozoic volcanic rocks of southeastern china is discussed in detail in this paper. The data presented in this paper indicate that the upper mantle beneath the area studied is enriched in the strongly HYG elements as compared with the chondritic mantle, and that the depth of cenozoic basaltic magma sources progressively increases from the coast to the inland. The cenozoic basaltic volcanism has occurred in a geotectonic setting of rifting continental margin; on the contrary, the Mesozoic volcanic rocks are predominated by the felsic volcanics erupting in a geotectonic setting of active continental margin. It can be inferred from the studies of ultramafic inclusion-derived geotherm that the cenozoic rifting of eastern china continent has been mainly controlled by the thermal mantle diapirism.

关键词： TRACE ELEMENT GEOCHEMISTRY cenozoic volcanic rock series in southeastern china HYGE REE

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