@article{oai:ir.kagoshima-u.ac.jp:00002539,
 author = {NEDACHI, Munetomo and ENJOJI, Mamoru and URASHIMA, Yukitoshi and MANSER, Warren},
 journal = {南方海域調査研究報告=Occasional Papers},
 month = {2016-10-27},
 note = {The temporal relation between intrusives and mineralization of the Panguna
porphyry copper deposit, Bougainville Island, Papua New Guinea, was reexamined
using paleomagnetic method.
The Kaverong Quartz Diorite intruded at the reversed geomagnetic period of 4.0
to 5.0 Ma. After the geomagnetic polarity changed, the Biotite Granodiorite intruded,
and the surrouding rocks were mineralized. These rocks have remanent magnetizations
of normal polarity. At the next geomagnetic period of reversed polarity, the second
mineralization expanded in and around the Leucocratic Quartz Diorite. The Feldspar
Porphyry and the Biuro Granodiorite might also intruded at this period.
The K_2O contents of the Kaverong Quartz Diorite is higher than those of the other
intrusives (MASON and MCDONALD, 1978). Hence, it is confirmed that the high K_2O
intrusive predated the low K_2O intrusive, with which porphyry copper mineralization
was closely associated.},
 pages = {13--26},
 title = {On the Paleomagnetism of the Intrusives from the Panguna Porphyry Copper Deposit, Bougainville, Papua New Guinea},
 volume = {5},
 year = {}
}