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Geochronology and Geochemistry of the Changyi Banded Iron Formation in Eastern Shandong Province: Constraints on BIF Genesis and Implications for Paleoproterozoic Tectonic Evolution of the North China Craton
Author(s) -
LAN Tingguang,
FAN Hongrui
Publication year - 2014
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 - 10.1111/1755-6724.12383_8
Subject(s) - craton , chinese academy of sciences , china , geochronology , geochemistry , geology , tectonics , library science , mineral resource classification , citation , state (computer science) , archaeology , geography , paleontology , computer science , algorithm
As the unique product in Precambrian, the deposition of banded iron formation (BIF) not only relates to the evolution of life, ocean and atmosphere, but also to the origin and growth of continents (Trendall, 2002). Paleoproterozoic BIFs were sporadically found with small scale in North China Craton (NCC), which contrast with the abundant Archean BIFs in the NCC. This distribution feature suggests that the NCC may have experienced a particular Paleoproterozoic evolutional history. The Changyi BIF deposit, one of the largest Paleoproterozoic BIF deposits in eastern NCC, provides an important key to reveal the origin of the Paleoproterozoic BIFs and the Paleoproterozoic geological evolution of the eastern NCC. This BIF deposit occurs within the Paleoproterozoic Fenzishan Group, and the BIF bands are interbedded with metamorphic rocks (Fig. 1). The BIF bands can be divided into macrobands, mesobands and microbands based on their scale and occurrence (Fig. 2). The macrobands are composed of alternating quartz-rich light and magnetite-rich dark mesobands and are layered or lens-shaped with thickness of several centimeters up to thirty six meters and length of ten meters to longer than two kilometers. The mesobands LAN Tingguang and FAN Hongrui, 2014. Geochronology and Geochemistry of the Changyi Banded Iron Formation in Eastern Shandong Province: Constraints on BIF Genesis and Implications for Paleoproterozoic Tectonic Evolution of the North China Craton. Acta Geologica Sinica (English Edition), 88(supp. 2): 1515-1517.