Using detrital garnet compositions to determine provenance: a new compositional database and procedure
Simon M. Suggate
Robert Hall
10.6084/m9.figshare.3453428.v1
https://geolsoc.figshare.com/articles/dataset/Using_detrital_garnet_compositions_to_determine_provenance_a_new_compositional_database_and_procedure/3453428
<p>Detrital garnet compositions can be used to help determine the provenance of sedimentary rocks. In this study a garnet compositional
database consisting of more than 2500 wet chemical and electron microprobe analyses was compiled from the literature. For
the garnets in the database the six principal garnet end-member compositions (pyrope, almandine, spessartine, uvarovite, grossular
and andradite) were calculated. A multi-stage methodology was devised to match garnet compositions to source rocks, and a
series of garnet provenance fields on ternary plots were identified. The method was tested using compositional data from detrital
garnet studies in several areas where provenance has already been identified, with good results. The methodology was then
used to assess the provenance of detrital garnets from Neogene sandstones of northern Sabah, Borneo for which provenance is
unknown and in a region where there are few garnet analyses for comparison. Comparison of garnet compositions from possible
sources on Palawan, Philippines and in Borneo combined with the ternary plots excludes some known garnet-bearing rocks as
potential sources and suggests derivation of metamorphic and igneous garnets from Palawan during the Early Miocene.
</p>
2016-06-21 11:24:29
electron microprobe analyses
detrital garnet compositions
detrital garnet studies
garnet provenance fields
procedure Detrital garnet compositions
ternary plots
garnet compositions
Geology