	Dill, H. G., Bosse, H.-R., Henning, K.-H., Fricke, A., Ahrendt, H. (1997) Mineralogical and chemical variations in hypogene and supergene kaolin deposits in a mobile fold belt the Central Andes of northwestern Peru. Mineralium Deposita, 32 (2) 149-163 doi:10.1007/s001260050081	Journal (article/letter/editorial)
	northwestern Peru Received: 11 August 1995 / Accepted: 8 May 1996 Abstract In western Peru kaolin-alunite...minerals are present: white mica, smectite, barite, pyrophyllite, tridymite, cristobalite, a- and bquartz, chamosite... S, Zr vs. Ti, Cr + Nb vs. Ti + Fe, and Ce + Y + La vs. Ba + Sr). S, Ba, and Sr are considerably enriched...1984; Mitchell 1992). The clay deposits in western Peru permit discrimination of hypogene and supergene...publications about ore deposits in the Andes, especially in Peru (Petersen 1970; Cardozo and Cedillo, 1990), research
	Dill, Harald G. (2010) The “chessboard” classification scheme of mineral deposits: Mineralogy and geology from aluminum to zirconium. Earth-Science Reviews, 100 (1) 1-420 doi:10.1016/j.earscirev.2009.10.011	Journal (article/letter/editorial)
	. . . . . . . . . . . . . . . 51.2.2. Talc-pyrophyllite . . . . . . . . . . . . . . . . . . . . 51.2... . . . . . . . . . . . . . . . 51.3.2. Talc-pyrophyllite . . . . . . . . . . . . . . . . . . . . 51.3.... . . . . . . . . . . . . . . . . . 51.4.4. Pyrophyllite . . . . . . . . . . . . . . . . . . . . . ....ZrO2 (Ba,Sr)(Nb,Ti)2(O,OH)7 BaSO4 2Ca(SO4)·H2O (Ce,La)(CO3)F Be3(Sc,Al)2 Si2O18 Ca(UO2)6O4(OH)6·8(H2O)...BaAl2Si2O8 (Ce,Th)O2 (Ce,Ca,Y)2(Nb,Ta)2O6(OH,F) (La,Ce,Ca)9(Mg,Fe)(SiO4)6[SiO3(OH)](OH)3 PbCO3 (Ca0.5Na
	Dill, Harald G. (2010) The “chessboard” classification scheme of mineral deposits: Mineralogy and geology from aluminum to zirconium. Earth-Science Reviews, 100 (1) 1-420 doi:10.1016/j.earscirev.2009.10.011	Journal (article/letter/editorial)
	. . . . . . . . . . . . . . . 51.2.2. Talc-pyrophyllite . . . . . . . . . . . . . . . . . . . . 51.2... . . . . . . . . . . . . . . . 51.3.2. Talc-pyrophyllite . . . . . . . . . . . . . . . . . . . . 51.3.... . . . . . . . . . . . . . . . . . 51.4.4. Pyrophyllite . . . . . . . . . . . . . . . . . . . . . ....ZrO2 (Ba,Sr)(Nb,Ti)2(O,OH)7 BaSO4 2Ca(SO4)·H2O (Ce,La)(CO3)F Be3(Sc,Al)2 Si2O18 Ca(UO2)6O4(OH)6·8(H2O)...BaAl2Si2O8 (Ce,Th)O2 (Ce,Ca,Y)2(Nb,Ta)2O6(OH,F) (La,Ce,Ca)9(Mg,Fe)(SiO4)6[SiO3(OH)](OH)3 PbCO3 (Ca0.5Na

Go to top of page

Pyrophyllite from La Noemia, Otuzco, Otuzco Province, La Libertad, Peru

Pyrophyllite from
La Noemia, Otuzco, Otuzco Province, La Libertad, Peru