Ages for Chalcopyrite at Lake Co., Minnesota, USA

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

• Locality age

• 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
  USGS-U-Th-Pb-00178_206_238	1995.5	1935.5	Zircon			166722	Birch Lake Area Prospect, Ely-Hoyt Lakes Area, Lake Co., Minnesota, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
  USGS-U-Th-Pb-00178_207_206	2458.8	2434.8	Zircon			166722	Birch Lake Area Prospect, Ely-Hoyt Lakes Area, Lake Co., Minnesota, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
  USGS-U-Th-Pb-00178_207_235	2246.9	2174.9	Zircon			166722	Birch Lake Area Prospect, Ely-Hoyt Lakes Area, Lake Co., Minnesota, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
  USGS-U-Th-Pb-00179_206_238	1576.6	1530.6	Zircon			166722	Birch Lake Area Prospect, Ely-Hoyt Lakes Area, Lake Co., Minnesota, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
  USGS-U-Th-Pb-00179_207_206	2460.7	2436.7	Zircon			166722	Birch Lake Area Prospect, Ely-Hoyt Lakes Area, Lake Co., Minnesota, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
  USGS-U-Th-Pb-00179_207_235	2006	1942	Zircon			166722	Birch Lake Area Prospect, Ely-Hoyt Lakes Area, Lake Co., Minnesota, USA	USGS-U-Th-Pb	USGS-U-Th-Pb