Asset Details
Do you wish to reserve the book?
Lu-sup.176Hf geochronology of garnet I: experimental determination of the diffusion kinetics of Lu.sup.3+ and Hf.sup.4+ in garnet, closure temperatures and geochronological implications
Hey, we have placed the reservation for you!
By the way, why not check out events that you can attend while you pick your title.
Oops! Something went wrong.
Looks like we were not able to place the reservation. Kindly try again later.
Are you sure you want to remove the book from the shelf?
Lu-sup.176Hf geochronology of garnet I: experimental determination of the diffusion kinetics of Lu.sup.3+ and Hf.sup.4+ in garnet, closure temperatures and geochronological implications
Do you wish to request the book?
Lu-sup.176Hf geochronology of garnet I: experimental determination of the diffusion kinetics of Lu.sup.3+ and Hf.sup.4+ in garnet, closure temperatures and geochronological implications
Please be aware that the book you have requested cannot be checked out. If you would like to checkout this book, you can reserve another copy
We have requested the book for you!
Your request is successful and it will be processed during the Library working hours. Please check the status of your request in My Requests.
Oops! Something went wrong.
Looks like we were not able to place your request. Kindly try again later.
Journal Article
Lu-sup.176Hf geochronology of garnet I: experimental determination of the diffusion kinetics of Lu.sup.3+ and Hf.sup.4+ in garnet, closure temperatures and geochronological implications
2015
Overview
The [sup.176]Lu-[sup.176]Hf and [sup.147]Sm-[sup.143]Nd decay systems are routinely used to determine garnet (Grt)-wholerock (WR) ages; however, the [sup.176]Lu-[sup.176]Hf age of garnet is typically older than the [sup.147]Sm-[sup.143]Nd age determined from the same aliquots. Here we present experimental data for [Lu.sup.3+] and [Hf.sup.4+] diffusion in garnet as functions of temperature, pressure and oxygen fugacity and show that the diffusivity of [Hf.sup.4+] in almandine/spessartine garnet is significantly slower than that of [Lu.sup.3+]. The diffusive closure temperature ([T.sub.C]) of [Hf.sup.4+] is significantly higher than that of [Nd.sup.3+], and although this property is partly responsible for the observed [sup.176]Lu-[sup.176]Hf and [sup.147]Sm-[sup.143]Nd Grt-WR age discrepancies, the difference between the [T.sub.C]-s of [Lu.sup.3+] and [Hf.sup.4+] could lead to apparent Grt-WR [sup.176]Lu-[sup.176]Hf ages that are skewed from the age of [Hf.sup.4+] closure in garnet. In addition, the slow diffusivity of [Hf.sup.4+] indicates that the bulk of metamorphic garnets retain a substantial fraction of prograde radiogenic [sup.176]Hf throughout peak metamorphic conditions, a phenomenon that further complicates the interpretation of [sup.176]Lu-[sup.176]Hf garnet ages and invalidates the use of analytical [T.sub.C] expressions. We argue that the diffusion of trivalent rare earth elements in garnet becomes much faster when their concentration level falls below a few hundred ppm, as in the experiments of Tirone et al. (Geochim Cosmochim Acta 69: 2385-2398, 2005), and further argue that this low-concentration mechanism is appropriate for modeling the susceptibility of [sup.147]Sm-[sup.143]Nd garnet ages to diffusive resetting.
Publisher
Springer
Subject
We currently cannot retrieve any items related to this title. Kindly check back at a later time.