Premium
Identification of Five Stages of Dike Swarms in the Shanxi‐Hebei‐Inner Mongolia Border Area and Its Tectonic Implications
Author(s) -
Ji'an SHAO,
Mingguo ZHAI,
Lüqiao ZHANG,
Daming LI
Publication year - 2004
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/j.1755-6724.2004.tb00706.x
Subject(s) - dike , craton , geology , tectonics , intrusion , mantle (geology) , inner mongolia , geochemistry , china , extensional definition , seismology , geography , archaeology
Dike swarms are generally ascribed to intrusion of mantle‐source magma result from extension. Basic dike swarms around the Shanxi‐Hebei‐Inner Mogolia borders in the northern peripheral area of the North China Craton can be divided into five age groups according to isotopic dating: 1800–1700 Ma, 800–700 Ma, 230 Ma, 140–120 Ma, and 50–40 Ma. Geological, petrological and isotope geochemical features of the five groups is investigated in order to explore the variation of the mantle material composition in the concerned area with time. And the various extensional activities reflected by the five groups of dike swarms are compared with some important tectonic events within the North China Craton as well as around the world during the same period.