Skip to menu

XEDITION

Board

The Radiometric Dating Game

RKSDonnie344465 2024.12.03 17:29 Views : 10

1062

This is significant because it is known that neutrinos do interact with the nucleii of atoms, and it is also believed that much of the energy of supernovae is carried away by neutrinos. Back to top Isochrons are an attempt to avoid the need for an absence of daughter element initially in computing radiometric ages. The idea is that one has a parent element, X, a daughter element, Y, and another isotope, Z, of the daughter that is not generated by decay. One would assume that initially, the concentration of Z and Y are proportional, since their chemical properties are very similar. Z By taking enough measurements of the concentrations of X, Y, and Z, publ.icwordtiredplan.e.s.j.a.d.e.d.i.m.p.u we can solve for c1 and c2, and from c1 we can determine the radiometric age of the sample. Let’s apply this to potassium argon dating, where X is K40, Y is Ar40, and Z is probably Ar36.


If the concentration of K varies in a rock, that it is unlikely for the concentration of added argon 40 to vary in a way that will yield an isochron. But if the concentration of K does not vary, then one can still get an isochron if the concentration of the non-radiogenic isotope Ar36 of the daughter product varies. So let’s call an isochron a "super-isochron" if the concentration of the parent element varies from one sample to another. Let’s call it a "wimpy isochron" otherwise. The question is, what percentage of isochrons are super-isochrons, and how do their dates agree with the conventional dates for their geologic period? I would think that it may be rare to have a super-isochron. If one is dealing with minerals that exclude parent or daughter, then one cannot get an isochron at all. If one is dealing with minerals that do not exclude parent and daughter elements, then most likely the parent element will be evenly distributed everywhere, and one will have a wimpy isochron that cannot detect added daughter product, and thus may give unreliable ages.


Whole rock isochrons may also tend to be wimpy, for the same reason. Even super isochrons can yield ages that are too old, due to mixings, however. False K-Ar isochrons can be produced if a lava flow starts out with a lot of excess Ar40 which becomes well mixed, along with potassium. Then while cooling or afterwards, a mixture of Ar36 and Ar40 can enter the rock, more in some places than others. Other isotopes of argon would work as well. I believe that this will produce a good K-Ar isochron, but the age calculated will be meaningless. There is another way that false isochrons can be produced. For a wimpy isochron, say a K-Ar isochron, we can assume that initially there is a uniform concentration of K everywhere, and concentrations of Ar40 and Ar36 that form an isochron. Then a lot of Ar40 enters, uniformly, through cracks in the rock or heating. Th is was c​re ated wi th GSA ​Conten​t ​Gene​rato r DE MO!


This will retain the isochron property, but will make the isochron look too old. My reasoning was that if the lava is thoroughly mixed, then the concentration of parent material should be fairly constant. If the concentration of parent substance is not constant, it could indicate that the lava is not thoroughly mixed. Or it could have other explanations. If the lava is not thoroughly mixed, it is possible to obtain an isochron from the mixing of two different sources, in which case the radiometric age is inherited from the sources, and does not necessarily yield the age of the flow. Someone pointed out to me that many Rb-Sr isochrons are super isochrons. I find this information very interesting, and thank him for it. I’d be curious to know which strata they occur in, as my main interest is the geologic column of Cambrian and above. My impression is that these are not on this part of the geologic column. And how well do the dates correlate with others for the same formation? This po st was w​ri tt en  with the he᠎lp of G SA Conten t  Ge​nerator DEMO᠎!

No. Subject Author Date Views
87348 Best Quantum Computing Courses Online With Certificates 2024 new MelissaKersey844 2024.12.06 2
87347 Platform Getahslot Pgsoft Yang Gacor Menjadi Solusi Terbaik Untuk Bermain Slot. Sebagai Salah Satu Platform Terpercaya, Getahslot Menyediakan Berbagai Permainan Dari Provider Terkemuka Seperti Pgsoft. new SharylHurley854 2024.12.06 0
87346 Bestattungstraditionen In Südafrika: Einblicke In Kulturelle Vielfalt Und Rituale new XiomaraMakowski675 2024.12.06 0
87345 Как Подобрать Идеального Интернет-казино new MarcellaThibodeaux73 2024.12.06 2
87344 Just How To Sell Your Company For The Optimum Rate new WoodrowSee119765893 2024.12.06 4
87343 Ko66 new MadelineZ84210384 2024.12.06 0
87342 10 Ideal Offshore Sportsbooks 2024 new DiannaMontagu94 2024.12.06 0
87341 Products Alfa Vitamins Shop new DedraHenke9630756 2024.12.06 0
87340 Müthiş Yakınlaşmalar Sunacak Diyarbakır Escort Bayan Yelda new ReaganHeard930935635 2024.12.06 2
87339 Compare Business Electricity Prices new DarciSantacruz75196 2024.12.06 2
87338 KUBET: Web Slot Gacor Penuh Maxwin Menang Di 2024 new BenitoSeverance02761 2024.12.06 0
87337 Chipotle Unveils A New Energy new Viola94Q1718648790240 2024.12.06 3
87336 Dengan Berbagai Pilihan Permainan Dan RTP Yang Menguntungkan, Getahslot Adalah Tempat Terbaik Untuk Bermain Slot. Nikmati Pengalaman Bermain Yang Seru Dan Penuh Peluang Menang Besar Hanya Di Getahslot. new MichellBmn8380735314 2024.12.06 0
87335 Robotic Or Human? new GeorgiannaPerryman9 2024.12.06 0
87334 Amazon.com new MarilynnBehrends2302 2024.12.06 0
87333 Exactly How To Sell Your Organization For The Maximum Cost new TameraWhittaker9 2024.12.06 2
87332 Electricity And Gas Plans new KassieFerrer10430 2024.12.06 0
87331 Leading 13 Finest Spermidine Supplements new CrystleRobe38008320 2024.12.06 2
87330 Watch Out: How Live2bhealthy Is Taking Over And What To Do About It new TaylahClaudio3370977 2024.12.06 0
87329 Marketing A Local Business new Carmon291176747845589 2024.12.06 0
Up