Microstructure and Technology of Ancient Iron Axes Excavated from Suchon-ri, Gongju, Korea

2014 ◽  
Vol 52 (3) ◽  
pp. 225-231 ◽  
Author(s):  
Hyun Kyung Cho ◽  
Nam Chul Cho ◽  
Hun Lee
Keyword(s):  
2021 ◽  
Vol 776 ◽  
pp. 145929
Author(s):  
Adnane Amnai ◽  
Diane Radola ◽  
Flavien Choulet ◽  
Martine Buatier ◽  
Frédéric Gimbert

1985 ◽  
Vol 95 (2) ◽  
pp. 73-79 ◽  
Author(s):  
V. N. Bhoraskar ◽  
S. Y. Mahajan ◽  
S. S. Jayanthakumar ◽  
V. D. Gogate

2021 ◽  
Author(s):  
Kaarel Mänd ◽  
Leslie J. Robbins ◽  
Noah J. Planavsky ◽  
Andrey Bekker ◽  
Kurt O. Konhauser

Ancient iron formations - iron and silica-rich chemical sedimentary rocks that formed throughout the Precambrian eons - provide a significant part of the evidence for the modern scientific understanding of palaeoenvironmental conditions in Archaean (4.0–2.5 billion years ago) and Proterozoic (2.5–0.539 billion years ago) times. Despite controversies regarding their formation mechanisms, iron formations are a testament to the influence of the Precambrian biosphere on early ocean chemistry. As many iron formations are pure chemical sediments that reflect the composition of the waters from which they precipitated, they can also serve as nuanced geochemical archives for the study of ancient marine temperatures, redox states, and elemental cycling, if proper care is taken to understand their sedimentological context.


PLoS ONE ◽  
2020 ◽  
Vol 15 (3) ◽  
pp. e0229623 ◽  
Author(s):  
Michael Brauns ◽  
Naama Yahalom-Mack ◽  
Ivan Stepanov ◽  
Lee Sauder ◽  
Jake Keen ◽  
...  

1999 ◽  
Vol 125 (1-2) ◽  
pp. 83-98 ◽  
Author(s):  
H.C. Dasgupta ◽  
V.V. Sambasiva Rao ◽  
C. Krishna

1962 ◽  
Vol 2 (3) ◽  
pp. 197-202 ◽  
Author(s):  
G.H. Booth ◽  
A.K. Tiller ◽  
F. Wormwell

Radiocarbon ◽  
2013 ◽  
Vol 55 (2) ◽  
pp. 331-337 ◽  
Author(s):  
C Moreau ◽  
I Caffy ◽  
C Comby ◽  
E Delqué-Količ ◽  
J-P Dumoulin ◽  
...  

The Artemis accelerator mass spectrometry (AMS) facility is dedicated to high-precision radiocarbon measurements. It routinely measures over 4500 samples a year for French laboratories. This paper is a status report, showing the measurements of standard, blank, and FIRI intercomparison samples. Since 2008, research and development programs have been established by the Artemis team. During the collaborations with other research laboratories, intercomparisons on archaeological samples were performed and are listed here to show the quality of the Artemis measurements. Three areas of specific research and development are investigated: technical development, beam optic simulations, and specific archaeological studies. The technical developments of the facility are based on the setup of a new bench for water sample preparation and routine microsample preparation and measurement. Beam optic simulations are carried out to control the quality of the measurement related to the tuning of the facility. International collaborations are always in progress. In 2012, the programs include improving the accuracy of reigns for the dynastic Egypt period and the 14C dating of ancient iron.


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