@article{fdi:010082532,
  title = {{D}issolution of radiation-damaged zircon in lateritic soils},
  author = {{D}elattre, {S}. and {U}tsunomiya, {S}. and {E}wing, {R}. {C}. and {B}oeglin, {J}ean-{L}oup and {B}raun, {J}ean-{J}acques and {B}alan, {E}tienne and {C}alas, {G}.},
  editor = {},
  language = {{ENG}},
  abstract = {{Z}ircon crystals from lateritic soils at {N}simi, {C}ameroon, were investigated using electron microprobe analysis ({EMPA}), transmission electron microscopy ({TEM}), scanning electron microscopy ({SEM}), and {R}aman spectroscopy to determine the extent of radiation damage from alpha-decay events. {T}he soils belong to a small watershed developed on granitic rocks of the {C}ongo craton (2.9 {G}a). {I}nteractions with fluids are evidenced by significant {C}a{O} (up to 1.5 wt%), {A}l2{O}3 (up to 2.9 wt%), and {F}e2{O}3 ({UP} to 2.9 wt%) concentrations in {UO}2 rich regions (0.05 to 1 wt%) of the zircon. {R}egional heating up to 500 degrees {C}, related to the {P}an-{A}frican orogeny about 0.6 {G}a ago, has lead to the recrystallization of the radiation-damaged grains and the formation of a nanoporous microstructure. {T}he correlation observed between the presence of dissolution features and the actual damage state of zircon shows that zircon dissolution occurs under tropical weathering conditions and with preferential dissolution of the highly radiation-damaged regions. {C}ongruent dissolution of zircon and the limited mobility of {Z}r are supported by the absence of zirconium oxide precipitates in the fractures of weathered grains of zircon.},
  keywords = {zircon ; {N}simi ; laterite ; nanopore ; zirconium ; metamict ; radiation damage ; {TEM}},
  booktitle = {},
  journal = {{A}merican {M}ineralogist},
  volume = {92},
  numero = {11-12},
  pages = {1978--1989},
  ISSN = {0003-004{X}},
  year = {2007},
  DOI = {10.2138/am.2007.2514},
  URL = {https://www.documentation.ird.fr/hor/fdi:010082532},
}