Thermochronological and geochemical footprints of post-orogenic fluid alteration recorded in apatite: Implications for mineralisation in the Uzbek Tian Shan

S. Glorie, G. Jepson, D. Konopelko, R. Mirkamalov, F. Meeuws, S. Gilbert, J. Gillespie, A. S. Collins, W. Xiao, S. Dewaele, J. De Grave

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

The Uzbek Tian Shan is a prominent metal-rich belt, hosting world-class orogenic Au deposits such as Muruntau. However, its post-collisional history in relation to fluid alteration and mineralisation remains elusive. We present apatite U–Pb dates and rare earth element geochemistry for 44 granitoids, revealing a prolonged history of low-grade metamorphism and associated fluid alteration between ~285 and ~240 Ma. A resulting apatite U–Pb age interpolation map reveals two young anomalies that are interpreted as post-orogenic fluid circulation cells. In addition, the extent of Meso-Cenozoic denudation is presented using apatite fission track (FT) age data. In areas of good data coverage, the combined Apatite U–Pb and FT anomalies reveal a correlation with the locations of orogenic Au mineralisation. Although more data is required to further evaluate such correlation, our study illustrates that integrated multi-method apatite thermochronology and geochemistry may have the potential to become a novel viable tool for mineral exploration.

Original languageEnglish
Pages (from-to)1-15
Number of pages15
JournalGondwana Research
Volume71
DOIs
Publication statusPublished - 1 Jul 2019

Keywords

  • Apatite U–Pb
  • Central Asian Orogenic Belt
  • Fluid alteration
  • Orogenic au
  • Tian Shan
  • Trace element geochemistry
  • ZIRCON
  • TIEN-SHAN
  • Apatite U-Pb
  • GEOCHRONOLOGY
  • TRACE-ELEMENT COMPOSITIONS
  • EVOLUTION
  • CONSTRAINTS
  • U-PB SYSTEMATICS
  • MURUNTAU GOLD DEPOSIT
  • INSIGHTS
  • TOOL

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