Автор(ы):Пятин С.А., Соловьёв А.Н., Чиков Б.М.
Издание:СО РАН НИЦ ОИГГМ, Новосибирск, 1991 г., 19 стр., УДК: 552.164+550.89
Язык(и)Русский
Импульсное компактирование гранитного катаклазита

Экспериментальное компактирование минеральной смеси гранитного состава проведено в стальном контейнере методом скользящей детонации. Полученный продукт по структурно-текстурным характеристикам аналогичен природномy бластокатаклазиту. Под воздействием ударной волны компактит структурирован, что выражатся зональной амоpфизацией и частичным перераспределением вещества.

Для специалистов в области структурной геологии, метаморфизма и геологов-съемщиков

ТематикаПетрология, Геологическое картирование, Структурная геология
МеткиБластокатаклазит, Импульсное колмпактирование, Катаклазиты, Скользящая детонация
Выпуск 378
Автор(ы):Shimamoto T., Uehara S.
Издание:Journal Tectonophysics, 2004 г., 13 стр.
Язык(и)Английский
Gas permeability evolution of cataclasite and fault gouge in triaxial compression and implications for changes in fault-zone permeability structure through the earthquake cycle

We report the results of permeability measurements of fault gouge and tonalitic cataclasite from the fault zone of the Median Tectonic Line, Ohshika, central Japan, carried out during triaxial compression tests. The experiments revealed marked effects of deformation on the permeability of the specimens. Permeability of fault gouge decreases rapidly by about two orders of magnitude during initial loading and continues to decrease slowly during further inelastic deformation. The drop in permeability during initial loading is much smaller for cataclasite than for gouge, followed by abrupt increase upon failure, and the overall change in permeability correlates well with change in volumetric strain, i.e., initial, nearly elastic contraction followed by dilatancy upon the initiation of inelastic deformation towards specimen failure. If cemented cataclasite suffers deformation prior to or during an earthquake, a cataclasite zone may change into a conduit for fluid flow. Fault gouge zones, however, are unlikely to switch to very permeable zones upon the initiation of fault slip. Thus, overall permeability structure of a fault may change abruptly prior to or during earthquakes and during the interseismic period. Fault gouge and cataclasite have internal angles of friction of about 36j and 45j, respectively, as is typical for brittle rocks.

ТематикаРегиональная геология
МеткиCataclasite, Earthquake, Fault gouge, Fluid flow, Median Tectonic Line, Permeability, Triaxial deformation, Землетрясения, Катаклазиты, Флюиды
Ленты новостей
1409.7