Zircon U-Pb Dating and Its Geological Significance of Lamprophyres from Qingchengzi Orefield，Liaodong

doi:10.12068/j.issn.1005-3026.2016.07.030

Journal of Northeastern University Natural Science ›› 2016, Vol. 37 ›› Issue (7): 1056-1060.DOI: 10.12068/j.issn.1005-3026.2016.07.030

• Resources & Civil Engineering • Previous Articles Next Articles

Zircon U-Pb Dating and Its Geological Significance of Lamprophyres from Qingchengzi Orefield，Liaodong

ZHANG Peng¹， ZHAO Yan²， KOU Lin-lin²， YANG Hong-zhi²

1. College of Earth Sciences， Jilin University， Changchun 130061， China； 2. Shenyang Institute of Geology and Mineral Resources， Shenyang 110034， China.

Received:2015-01-12 Revised:2015-01-12 Online:2016-07-15 Published:2016-07-13
Contact: ZHANG Peng
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Abstract

Abstract: To better understand the petrogenesis， tectonic environment， and geological significance of the lamprophyres in Qingchengzi， Liaodong. Zircon U-Pb dating and major elements were studied by LA-ICP-MS U-Pb and X-ray fluorescence spectrometers. Results show that characteristics of the lamprophyres have low silicon and high ferrum and magnesium. Zircon LA-ICP-MS U-Pb dating yields ages of (226.0±1.0)Ma～(227.7±1.3)Ma， which indicate lamprophyres are the product of late Indosinian magmatism in North China Craton(NCC). Combined with regional tectonic evolution， results indicate that the lamprophyreas originated from slab break-off during the process of Yangtze Craton and North China Craton continental deep subduction. The deep subduction of Yangtze continental crust and continent-continent collision could be the main reason for the late Mesozoic decratonization of the North China Craton.

Key words: lamprophyres, geochronology, late Triassic, Qingchengzi, Liaodong

CLC Number:

P588
P588.13

ZHANG Peng， ZHAO Yan， KOU Lin-lin， YANG Hong-zhi. Zircon U-Pb Dating and Its Geological Significance of Lamprophyres from Qingchengzi Orefield，Liaodong[J]. Journal of Northeastern University Natural Science, 2016, 37(7): 1056-1060.

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Zircon U-Pb Dating and Its Geological Significance of Lamprophyres from Qingchengzi Orefield，Liaodong

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