Ages for Powellite at Green Monument Mine (Green Monument Prospect), C And H Mine Group (Copper Alex Mine Group; Copper Aleck Mine Group; C & H Mine Group), Sycamore Canyon, Helvetia, Helvetia-Rosemont District, Santa Rita Mts, Pima Co., Arizona, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 62Ma - 56Ma at this locality

• Locality age (remote)

• Excel ID	Max Age (Ma)	Min Age (Ma)	Dated Mineral	Minerals explicitely stated as having this age	Age applies to these Elements	Dated Locality ID	Dated Locality	Ref	Ref ID
  PorphCu-00109	62	56		Bornite, Chalcopyrite, Chrysocolla, Diopside, Epidote, Galena, Gold, Magnetite, Molybdenite, Pyrite, Scheelite, Sphalerite, Wollastonite	Cu	49290	Helvetia, Helvetia-Rosemont District, Santa Rita Mts, Pima Co., Arizona, USA	Singer et al. (2008)	USGSOFR2008_1155