Using detrital garnets to determine provenance: a case study from the Vertiskos Unit (Serbomacedonian Massif, N. Greece)

Georgiadis, Ioannis K.; Koroneos, C.; Παπαδοπούλου, Λ.; Kantiranis, Nikolaos; Tamparopoulos, Alexios E.; Tsirambides, A.

doi:10.1007/s00710-013-0295-1

Cited by 1 publication

(1 citation statement)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Considerable overlap between amphibolite-facies metasedimentary and metaigneous rocks on the one hand and granulite-facies metaigneous and eclogite-facies rocks on the other is apparent but hardly avoidable due to similar garnet chemistries. Consideration of additional garnets associated with orthogneisses would probably lead to dimension changes of the metaigneous rock subfields (e.g., Povondra and Vrána 1996;Breiter et al 2005;Chopin et al 2012;Georgiadis et al 2014).…”

Section: Limitations Of Tetgar_cmentioning

confidence: 99%

TETGAR_C: a novel three-dimensional (3D) provenance plot and calculation tool for detrital garnets

Knierzinger¹,

Wagreich²,

Kiraly³

et al. 2019

J. Geosci.

View full text Add to dashboard Cite

This paper presents a new interactive MATLAB-based visualization and calculation tool (TETGAR_C) for assessing the provenance of detrital garnets in a four-component (tetrahedral) plot system (almandine-pyrope-grossular-spessartine). Based on a freely-accessible database and additional electron-microprobe data, the chemistry of more than 2,600 garnet samples was evaluated and used to create various subfields in the tetrahedron that correspond to calc-silicate rocks, felsic igneous rocks (granites and pegmatites) as well as metasedimentary and metaigneous rocks of various metamorphic grades. These subfields act as reference structures facilitating assignments of garnet chemistries to source lithologies. An integrated function calculates whether a point is located in a subfield or not. Moreover, TETGAR_C determines the distance to the closest subfield's mean value. Compared with conventional ternary garnet discrimination diagrams, this provenance tool enables a more accurate assessment of potential source rocks by reducing the overlap of specific subfields and offering quantitative testing of garnet compositions. In particular, a much clearer distinction between garnets from greenschist-facies rocks, amphibolite-facies rocks, blueschist-facies rocks and felsic igneous rocks is achieved. Moreover, TETGAR_C enables a distinction between garnet grains with metaigneous and metasedimentary provenance. In general, metaigneous garnet tends to have higher grossular content than metasedimentary garnet formed under similar P-T conditions.

show abstract

Section: Limitations Of Tetgar_cmentioning

confidence: 99%