Research article 22 Oct Correspondence : Hugo K. Olierook hugo. Dating multiple geological events in single samples using thermochronology and geochronology is relatively common, but it is only with the recent advent of triple quadrupole laser ablation inductively coupled plasma mass spectrometry LA-ICP-MS that in situ rubidium—strontium Rb—Sr dating has become a more commonly applied and powerful tool to date K-rich or Rb-bearing minerals. Here, we date two generations of mineral assemblages in individual thin sections using the in situ Rb—Sr method. Two distinct mineral assemblages, both probably associated with Au mineralization, are identified in samples from the Tropicana gold mine in the Albany—Fraser Orogen, Western Australia.
This book is a compilation of seven Creation Research Society Quarterly reprints published by the Creation Research Society , two reprints from the Proceedings of the International Conference on Creationism , and one reprint of an Institute for Creation Research Impact pamphlet. All of the papers were written by Woodmorappe and each address various topics relating to the young-earth creationist belief in a geologically-recent global deluge Noah's Flood. The book has no publisher's information page but it seems clear from the Forward , written by the well-known young-earth creationist Henry Morris, that it was published by the Institute for Creation Research in On the cover of the book, John Woodmorappe is credited with possessing an M. The Impact reprint in the book states that:. I found it odd that nowhere in the book was it indicated where Woodmorappe earned his degrees or his current professional affiliation Where does he teach science?
Potassium—calcium dating , abbreviated K—Ca dating , is a radiometric dating method used in geochronology. It is based upon measuring the ratio of a parent isotope of potassium 40 K to a daughter isotope of calcium 40 Ca. Calcium is common in many minerals, with 40 Ca being the most abundant naturally occurring isotope of calcium
As you know, there are numerous radioactive isotopes that can be used for numeric dating. All of the dating methods rely on the fundamental principles of radioactive decay, but the specific materials that can be dated and the exact procedures for calculating a date are very different from one method to the next. The rest of this activity is about using the Rb-Sr method. Rubidium occurs in nature as two isotopes: radioactive Rb and stable Rb Rb decays with a half-life of