A Northland Maori leader says minerals exploration company De Grey Mining Ltd is not welcome in the region.
Benjamin Pittman, of Ngati Hau, said De Grey should relinquish all exploration permits within the Puhipuhi tribal area. Ngati Hau has asked other hapu, community groups and people to unite in support to protect water, wahi tapu, land and people from "the threat of toxic mining centred on Puhipuhi".
Puhipuhi, 30km north of Whangarei, has the largest known gold deposit in Northland and its rock can also be steeped in mercury.
The mountain forms the headwaters of the springs, streams and rivers that flow to the Bay of Islands, Helena Bay, Mimiwhangata, Hikurangi Swamp and Kaipara Harbour.
Last year a gold and silver exploration licence over much of Puhipuhi was transferred from mining giant Newmont to the Australian company De Grey.