Banded Iron Formation, Fig. 1 ( a ) Outcrop photograph of Algoma-type BIF with layers of magnetite BIF interbedded with felsic volcaniclastic rocks from the 2.9 Ga Itilliarsuk BIF, West Greenland. ( b ) Outcrop photograph of weakly folded magnetite-quartz BIF from the 2.85 Ga Central ...
The precise mechanisms underlying BIF formation remain an active area of research, but the prevailing theory suggests their genesis in oxygenated marine environments. As photosynthetic cyanobacteria flourished in the early oceans, their oxygen production triggered the oxidation of dissolved iron, leading to...
Abstract:The banded iron formation (BIF) is widely exposed in Muzidian area of Dabie Orogen,and its formation age and genesis have long lacked strong evidence support.Based on the detailed survey on Muzidian Formation sections in Wangjiafan and Liuzichong of Muzidian area,representative samples ...
L. SHRIMP U–Pb zircon ages for the Palaeoproterozoic Kuruman Iron Formation, Northern Cape Province, South Africa: evidence for simultaneous BIF deposition on Kaapvaal and Pilbara Cratons. Precambrian Res. 125, 275–315 (2003). Article Google Scholar Beukes, N. J. Sedimentology of the Kuru...
Define Banded iron formation. Banded iron formation synonyms, Banded iron formation pronunciation, Banded iron formation translation, English dictionary definition of Banded iron formation. n mineralogy a metamorphic rock that has a high concentration of
(II) necessary for the formation of the BIF via alteration of ancient continental crust. In addition, the Qidashan BIF was deposited under pervasively anoxic conditions, as revealed by the absence of shale-normalized Ce anomalies and the presence of consistently positive Fe isotope values. Hence,...
The meaning of BANDED IRON FORMATION is a sedimentary deposit that consists of alternating thin layers of iron oxides (such as magnetite or hematite) and iron-poor minerals (such as shale or chert) —abbreviation BIF. How to use banded iron formation in
The geological complexities of banded iron formation (BIF) and associated iron ores of Jilling-Langalata iron ore deposits, Singhbhum-North Orissa Craton, belonging to Iron Ore Group (IOG) eastern India have been studied in detail along with the geochemical evaluation of different iron ores. The...
2.42 Ga-old Gandarela Formation overlies the finely laminated Cauê Banded Iron Formation (BIF) of the Itabira ... Bekker,A. - 《American Journal of Science》 被引量: 102发表: 2003年 ^(40)Ar/^(39)Ar constraints on the age and thermal history of the Urucum Neoproterozoic banded iron-...
Hanwang banded iron formations(BIF) in Shandong Province constitute a large iron deposit of Anshan type formed in Neo-Archaean. 山东韩旺条带状铁矿是一个新太古代大型鞍山式铁矿床,本文主要对韩旺条带状铁矿进行了岩石学和岩石化学方面的研究,并与国内外该类型矿床进行对比。