Mellen Intrusive Complex; Granite

Mellen Intrusive Complex; Granite (about 1000 Ma)
State Michigan
Name Mellen Intrusive Complex; Granite
Geologic age Middle Proterozoic
Lithologic constituents
Major
Igneous > Plutonic > Granitic > Granitegranite associated with the Mellen complex
Comments This unit has since been dated at 1102.0 +/- 2.8 Ma (granophyre from the Mellen complex; Zartman and others, 1997, U-Th-Pb zircon ages of some Keweenawan Supergroup rocks from the south shore of Lake Superior: Canadian Journal of Earth Sciences, v. 34, p. 549-561); granite is probably same age as granophyre
References
NGMDB product
Counties Houghton