Zircon U-Pb dating and petrogenesis of the rhyolitic porphyroclastic lava in Chaihe area, Daxinganling mountains

被引：0
作者：
Si, Qiu-Liang [1 ]
Cui, Tian-Ri [2 ]
Wang, En-De [1 ]
Men, Ye-Kai [1 ]
机构：
[1] School of Resources and Civil Engineering, Northeastern University
[2] Shenyang Institute of Geology and Mineral Resources
来源：
Dongbei Daxue Xuebao/Journal of Northeastern University | 2014年 / 35卷 / 03期
关键词：
Chaihe area; Daxinganling Mountains; Geochemistry; Rhyolitic porphyroclastic lava; Zircon U-Pb dating;
D O I：
10.3969/j.issn.1005-3026.2014.03.031
中图分类号：
学科分类号：
摘要：
In order to study the formation age and petrogenesis of the rhyolitic porphyroclastic lava in Chaihe area, Daxinganling mountains, ziron U-Pb isotopic dating and geochemical analysis were used. LA-ICP-MS zircon U-Pb dating results show that Chaihe rhyolitic porphyroclastic lava formed in early cretaceous from 135 to 138 Ma. The geochemical study show that characteristics of the rhyolitic porphyroclastic lava have high silicon and alkalis, poor calcium and magnesium. The total REE abundances ranged from 150.1×10-6~191.5×10-6, highly fractionated LREE from HREE[m(La)/m(Yb)N=11.8~14.45] and negative Eu anomalies (δEu=0.59~0.75). The trace elements are characterized evidently by enrichment of Rb, Ba, K, strong depletion of Nb, P, Ti. The geochemical characteristics show similarity with the I-type granite. The porphyroclastic lava's original magma is chiefly derived from partial melting of crust.
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页码：443 / 446
页数：3
相关论文
共 11 条
  • [1] Tao K.-Y., Huang G.-Z., Wang M.-X., Et al., The characteristic and genetic mechanism of porphyroclastic lava in southeastern China, Bulletin Nanjing Institute of Geology and Mineral Resource, Chinese Academy Geological Science, 6, 1, pp. 1-19, (1985)
  • [2] Lai S.-C., Xu H.-J., Features and petrologic significance of feldspars in porphyroclastic lava from Baiqi area, Inner Mongolia, Acta Mineralogical Sinica, 12, 1, pp. 26-35, (1990)
  • [3] Cui T.-R., Yang F.-L., Si Q.-L., Et al., Discovery and significance of the porphyroclastic lava in Chaihe area, middle Daxinganling Mountains, Geology and Resources, 21, 1, pp. 35-41, (2012)
  • [4] Jackson S.E., Pearson N.J., Griffin W.L., Et al., The application of laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) to in situ U-Pb zircon geochronology, Chemical Geology, 211, pp. 47-69, (2004)
  • [5] Andersen T., Correction of common lead in U-Pb analyses that do not report 204 Pb, Chemical Geology, 192, pp. 59-79, (2002)
  • [6] Yuan H.L., Gao S., Liu X.M., Et al., Accurate U-Pb age and trace element determinations of zircon by laser blation inductively coupled plasma mass spectrometry, Geostandard Newsletter: the Journal of Geostandards and Geoanalysis, 28, pp. 353-370, (2004)
  • [7] Belousova E.A., Griffin W.L., O'Reilly S.Y., Et al., Igneous zircon: trace element composition as an indicator of source rock type, Contributions to Mineralogy and Petrology, 143, pp. 602-622, (2002)
  • [8] Boynton W.V., Cosmochemistry of the rare earth elements: meteorite studies, Rare Earth Element Geochemistry, pp. 63-114, (1984)
  • [9] Sun S.S., McDonough W.F., Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and process, Magmatism in the Ocean Basins, pp. 313-345, (1989)
  • [10] Pearce J.A., The role of sub-continental lithosphere in magma genesis at destructive plate margins, Continental Basalts and Mantle Xenoliths, pp. 230-249, (1983)
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