O. B. Selyangin

Research Geotechnological Centre, Far Eastern Branch of Russian Academy of Scienses Severo-Vostochnoye shosse, 30, Petropavlovsk-Kamchatsky, 683002, Russia. Phone: (41522) 92639, fax: (41522) 92639,
e-mail: obs@kscnet.ru

Data on structure of one of the large nickel-bearing intrusions of Kamchatka as lopolith is revised. Principal peridotite-gabbro-norite part of layering massif is formed by two phases of many-portions injection of water magnesian basic magma. These phases were separated by tectonic event and overturned in different extent and different directions. Petrochemistry and petrography of the massif are discussed; recommendations for ores prospecting are given.