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Shuanghe, Qianshan Co., Anqing Prefecture, Anhui Province, China

Coesite-bearing titanite UHP paragneisses (intercalated with eclogites, marbles and jadeite quartzites) within the Dabie Shan - Sulu UHP metamorphic belt.
Located 2 km west of Shuanghe city and about 40 km WNW of Tongcheng.

UHP layered terranes, as a thrust slab, tectonically bounded, within granitic gneisses :
- Eclogites forming layers boudins and lenses in epidote two-micas schists or in marbles (north part of the slab).
- Carbonate eclogites forming nodules in marbles, strongly retrograded
- Layered eclogites intercalated with paragneisses
Late Archaean to Early Proterozoic protolith, peak metamorphism (230 Ma) (Journ. Geol. 109, 5, pp. 633-646) reached under the influence of highly salty fluids (meteoritic water trappedin basalt protoliths) (Acta Geologica Sinica, 2004, V 78, N°1, PP. 121-124).
- Marbles
- Jadeite quartzites forming layers in marbles, or layers between epidote two-micas schists and marbles.
Albitized sandstones derived from Archaean crust.
Peak metamorphism : 660 °C, > 2.6 kb.
- Epidote two-micas schists
- Amphibolites
- Garnet/biotite gneisses

Ref. Shuanghe / Eur. J. Mineral. , 1995, 7, pp. 119-138.





Mineral List:
  • Aegirine-augite
  • Albite
       var: Oligoclase
  • 'Albite-Anorthite Series'
  • 'Allanite'
  • Almandine
  • 'Apatite'
  • Aragonite
  • Barroisite
  • Biotite
  • Calcite
  • Coesite
  • Diamond
  • Dolomite
    var: Ferroan Dolomite
  • Epidote
  • 'Hornblende'
  • Ilmenite
  • Jadeite
  • 'K Feldspar'
  • Kyanite
  • 'Monazite'
  • Omphacite
  • Orthoclase
  • Phengite
  • Phlogopite
  • Quartz
  • Rutile
  • Spessartine
  • Talc
  • Taramite
  • Titanite
  • Zircon
  • Zoisite


    33 entries listed. 23 valid minerals.

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