We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Intraplate volcanic-hydrothermal systems of the Clarion-Clipperton zone, Pacific Ocean.
- Authors
Yubko, V.; Lygina, T.
- Abstract
The results of recent studies of specific craterlike structures in sediments of the Clarion-Clipperton zone (CCZ) of the Pacific Ocean are summarized. It was established from the example of a crater located in the bottom area with age of ∼40 Ma that such craters from several hundreds of meters to a few kilometers in diameter and from 15 to 100 m deep are a result of evolution of intraplate volcanic-hydrothermal systems mostly active in the CCZ area beginning from the Middle Miocene. Vertical chimneylike channels from a few centimeters to 0.5 m across in pre-Middle Miocene carbonate sediments in the areas of subvolcanic basaltic stocks with an age of 16-18 Ma and less are the structural elements of these systems. The channels are filled with nontronite clays and Fe-Mn hydroxides, which are the products of discharge of low-temperature hydrotherms. New data have allowed us to reach a conclusion on the origin of thermal convection of volcanichydrothermal systems, which dissolved the host carbonate sediments and formed the craterlike structures at the final stage of evolution.
- Subjects
PACIFIC Ocean; HYDROTHERMAL deposits; VOLCANIC ash, tuff, etc.; VOLCANISM; CLARION Fracture Zone; CRATERING; BASALT; NONTRONITE; MIOCENE stratigraphic geology
- Publication
Doklady Earth Sciences, 2015, Vol 462, Issue 2, p555
- ISSN
1028-334X
- Publication type
Article
- DOI
10.1134/S1028334X15060082