The Failure of U-Th-Pb "Dating"; at Koongarra, Australia | The Institute for Creation Research
 
The Failure of U-Th-Pb "Dating"; at Koongarra, Australia

Download PDFDownload The Failure of U-Th-Pb "Dating"; at Koongarra, Australia PDF

Published in: CEN Technical Journal, volume 9, number 1, pp. 71–92, 1995.

© 1995 Answers in Genesis A. C. N. 010 120 304. All Rights Reserved.

Abstract

As with other radiometric “dating” methods, the U-Pb and Pb-Pb isochron methods have been questioned in the open literature, because often an excellent line of best fit between ratios obtained from a set of good cogenetic samples gives a resultant “isochron” and yields a derived “age” that has no geological meaning. At the Koongarra uranium deposit, Australia, there is ample evidence of open system behavior, or repeated migration, of U and Pb—ore textures, mineral chemistry, supergene alteration, uranium/daughter disequilibrium, and groundwater and soil geochemistry. Yet U-Th-Pb isotopic studies of the uranium ore, host rocks, and soils have produced an array of false “isochrons” that yield “ages” which are geologically meaningless. Even a claimed near-concordant U-Pb “age” of 862 Ma (million years) on one uraninite grain is identical to a false Pb-Pb isochron “age,” but neither can be connected to any geological event. The open system behavior of the U-Th-Pb system is clearly the norm, as is the resultant mixing of radiogenic Pb with “common” or background Pb, even in soils in the surrounding region, apparently even up to 17 km away! Because no geologically meaningful results can be interpreted from the U-Th-Pb data at Koongarra (three uraninite grains even yield a 232Th/208Pb “age” of 0 Ma), serious questions must be asked about the validity of the fundamental/foundational basis of the U-Th-Pb “dating” method. This makes the task of creationists building their model for the geological record much easier, since claims of U-Th-Pb radiometric “dating” having “proven” the claimed great antiquity of the earth, its strata and fossils can be justifiably ignored.

Keywords

Radiometric Dating, U-Pb and Pb-Pb Isochron Methods, Koongarra, Uranium Deposit, Open-System Behavior, Ore Textures, Mineral Chemistry, Supergene Alteration, Uranium-Daughter Disequilibrium, Groundwater and Soil Geochemistry, Uraninites, Galenas, False Isochrons, Mixing, Zero “Ages”

For Full Text

Please see the Download PDF link above for the entire article.

The Latest
NEWS
Human Genome 20th Anniversary—Junk DNA Hits the Trash
The first rough drafts of the human genome were reported in 2001 (one in the private sector and one in the public sector).1-2 Since then, after...

NEWS
Bacterial Proteins Use Quantum Mechanics
Researchers have found a dimmer switch inside a protein. It tunes the protein’s configuration to take advantage of quantum mechanics during photosynthesis....

NEWS
Dr. Bill Cooper, ICR’s Adjunct Professor, Now in Glory
Earlier last month on March the 9th, Dr. William R. Cooper, ICR’s Master Faculty (known to ICR-SOBA’s faculty as “Dr. Bill” since...

NEWS
Inside April 2021 Acts & Facts
How will ICR expand biblical creation education this year? How do fossilized fish and land creatures confirm Genesis history? Does recent research support...

ACTS & FACTS
Creation Kids: Bees
You’re never too young to be a creation scientist! Kids, discover fun facts about God’s creation with ICR’s special Creation Kids learning...

ACTS & FACTS
Pleasure in Our Purpose
Eric Liddell was one of the most famous athletes of the 20th century and perhaps the greatest that Scotland ever produced. An international rugby player,...

APOLOGETICS
Beware Sinkholes and Other Failing Foundations
The sudden falling of some Christian schools can be compared to tiankengs, the geological term used for sinkholes that are at least 300 feet deep.1,2...

ACTS & FACTS
The Painted Desert: Fossils in Flooded Mud Flats
Brian Thomas, Ph.D., and Tim Clarey, Ph.D. The Painted Desert stretches across 120 miles of northern Arizona. Its sedimentary rocks show bright...

ACTS & FACTS
Does Recent Research Support Human Evolution?
In 1997, the Institute for Creation Research ran an Acts & Facts article on the lack of compelling evidence regarding our supposed evolution from...

ACTS & FACTS
Building a Perfectly Optimal Flying Machine
For thousands of years, people have dreamed of flying because they witnessed birds and knew it was possible. Inspired by a study of birds, the Wright...