Asset Details
Do you wish to reserve the book?
Two Generations of Clinopyroxene Phenocrysts in Ultrapotassic Lavas (Lamproites) of the Quaternary Subglacial Gaussberg Volcano (East Antarctica)
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?
Two Generations of Clinopyroxene Phenocrysts in Ultrapotassic Lavas (Lamproites) of the Quaternary Subglacial Gaussberg Volcano (East Antarctica)
Do you wish to request the book?
Two Generations of Clinopyroxene Phenocrysts in Ultrapotassic Lavas (Lamproites) of the Quaternary Subglacial Gaussberg Volcano (East Antarctica)
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
Two Generations of Clinopyroxene Phenocrysts in Ultrapotassic Lavas (Lamproites) of the Quaternary Subglacial Gaussberg Volcano (East Antarctica)
2025
Overview
Abstract—Study of the morphological features and chemical composition of the ultrapotassic lavas from the Gaussberg volcano (East Antarctica) revealed two generations of clinopyroxene phenocrysts. These two groups of clinopyroxenes show distinct genetical trends that could not appear during the fractional crystallization. The first group (I) consists of high magnesian (Mg# 79–92) diopside. The second group (II) consists of more ferrous clinopyroxene grains (Mg# 59–69) (“green cores”), which are usually partly resorbed and contain zones of different composition. The Group I differs from the Group II in its higher contents of Ti, Cr, Ni and lower contents of Fe and Al. The characteristics of the natural samples were compared to the run products of the crystallization experiments with the Gaussberg ultrapotassic melt.. Based on these observations, it is proposed that the Group I (magnesian) is in equilibrium with the lamproitic melts, whereas ferrous Group II may be the relicts of clinopyroxene grains formed from the different, probably earlier portions of magma. This suggests a multistage activation of melting and associated crystallization processes in the magmatic system of the Gaussberg volcano and possible heterogeneity of a magma source.
Publisher
Springer Nature B.V
