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Geochemistry of the volcanic rock association from Lianghe area in Mianlue suture zone, southern Qinling and its tectonic significance.
其他题名南秦岭勉略带两河弧内裂陷火山岩组合地球化学及其大地构造意义
Lai, SC; Zhang, GW; Yang RY(杨瑞英); Yang, RY
2000
发表期刊ACTA PETROLOGICA SINICA
卷号16期号:3页码:317-326
通讯作者NW Univ Xian, Dept Geol, Xian 710069, Peoples R China ; Chinese Acad Sci, Inst High Energy Phys, Beijing 100080, Peoples R China
文章类型Article
摘要The volcanic rock slab in Lianghe area is located in the boundary tectonic zone: Bashan arcuate tectonic melange between Qinling microplate and Yangtze plate. The rocks consisted of subalkaline tholeiitic basalt and calc-alkaline dacitic rhyolite. Both of the basalt and dacitic rhyolite exhibit the typical geochemical features of high content of element Bar low content of elements Th and U. remarkable depletion of element Nb, Ta and Ti. Especially, the Th/Yb-Ta/Yb and Ti/Zr-Ti/Y features of the basalt indicate that the volcanic rock association in the studied area developed in a special tectonic setting which belongs to a rift valley within an island-arc. The volcanic rock association in the studied area was the result of magmatism that due to the ancient oceanic crust subduction and rift valley development within the island-arc during the evolutionary process of Mianlue ancient ocean basin at Middle Paleozoic-Early Mesozoic era. This volcanic rock block should be an important evidence which indicates that the Mianxian-Lueyang suture zone had extended to the Bashan arcuate area.
关键词volcanic rock geochemistry petrotectonics Mianlue suture zone
学科领域Geology
研究领域[WOS]Geology ; Geology
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语种英语
研究领域[WOS]Geology ; Geology
WOS类目Geology
WOS记录号WOS:000089084300002
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被引频次:6[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/236939
专题多学科研究中心
作者单位中国科学院高能物理研究所
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GB/T 7714
Lai, SC,Zhang, GW,Yang RY,et al. Geochemistry of the volcanic rock association from Lianghe area in Mianlue suture zone, southern Qinling and its tectonic significance.[J]. ACTA PETROLOGICA SINICA,2000,16(3):317-326.
APA Lai, SC,Zhang, GW,杨瑞英,&Yang, RY.(2000).Geochemistry of the volcanic rock association from Lianghe area in Mianlue suture zone, southern Qinling and its tectonic significance..ACTA PETROLOGICA SINICA,16(3),317-326.
MLA Lai, SC,et al."Geochemistry of the volcanic rock association from Lianghe area in Mianlue suture zone, southern Qinling and its tectonic significance.".ACTA PETROLOGICA SINICA 16.3(2000):317-326.
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