Skip to main content
U.S. flag

An official website of the United States government

Composite transform-convergent plate boundaries: description and discussion

January 1, 1992

The leading edge of the overriding plate at an obliquely convergent boundary is commonly sliced by a system of strike-slip faults. This fault system is often structurally complex, and may show correspondingly uneven strain effects, with great vertical and translational shifts of the component blocks of the fault system. The stress pattern and strain effects vary along the length of the system and change through time. These margins are considered to be composite transform-convergent (CTC) plate boundaries. Examples are given of structures formed along three CTC boundaries: the Aleutian Ridge, the Solomon Islands, and the Philippines. The dynamism of the fault system along a CTC boundary can enhance vertical tectonism and basin formation. This concept provides a framework for the evaluation of petroleum resources related to basin formation, and mineral exploration related to igneous activity associated with transtensional processes. ?? 1992.

Publication Year 1992
Title Composite transform-convergent plate boundaries: description and discussion
DOI 10.1016/0264-8172(92)90006-Z
Authors H. F. Ryan, P.J. Coleman
Publication Type Article
Publication Subtype Journal Article
Series Title Marine and Petroleum Geology
Index ID 70016562
Record Source USGS Publications Warehouse