Open AccessNew type of volcano-tectonic structure - 42-km wide deep-water calderoida at underwater Detroit Seamount Highland (North-Western Pacific)
Author(s) -
И. В. Мелекесцев
Publication year - 2019
Publication title -
doklady akademii nauk. rossijskaâ akademiâ nauk
Language(s) - English
Resource type - Journals
ISSN - 0869-5652
DOI - 10.31857/s0869-56524894384-387
Subject(s) - seamount , geology , volcano , horst , tectonics , submarine volcano , seismology , paleontology , pacific ocean , oceanography
At the northern part of Emperor Seamount Chain we discovered and classified the previously unknown rounded volcano-tectonic 42-km deep-sea morphostructure as calderoida (authors terminology). It lies at -2900-2200 m depth and represents very complex structure being broken by faults into many blocks of different sizes and shapes. It is situated at the northern portion of the Detroit Seamount Rise (NW Pacific Ocean) which is a Pliocene horst. The calderoida was formed in the Early Pleistocene at depths from -3000 to -2000 m. Its analogues have not been found on Earth yet.