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Table of Contents - Special Paper 320

The Surface Rupture of the 1957 Gobi-Altay, Mongolia, Earthquake


Foreword

Abstract

Introduction

Background

Sections of the rupture

Section A–B: Bogd rupture from the Bayan Tsagaan nuruu to the Ulaan bulag höndiy
Section B–C: Bogd rupture from Ulaan bulag höndiy to Öndgön Hayrhan ("Egg
  Mountain")
Section C–D: Bogd rupture from the Hüühniy höndiy to the Dalan Türüü foreberg
Section D–E: Dalan Türüü foreberg
Section E–F: Bogd rupture from the Dalan Türüü foreberg to the Toromhon sayr
Section F–G: Bogd rupture from the Toromhon sayr to Baga Bogd
Section G–H: Hetsüü foreberg
Section H–I: Bogd rupture northeast of Baga Bogd
Section I–J: Bogd rupture, north and east of Bulgan uul
Toromhon Overthrust
Tsagaan Ovoo-Tevsh uul rupture
Gurvan bulag rupture and its continuations
Deformation on Ih Bogd and its surrounding high terrain
Bitüüt landslide

Summary of surface faulting in 1957

Bogd rupture, exclusive of the forebergs
Dalan Türüü and Hetsüü forebergs
Toromhon Overthrust
Thrust faulting along the southern margin of Ih Bogd
Summit plateau of Ih Bogd

Implications for characteristic earthquakes, triggering of ruptures, and earthquakes elsewhere

Evidence and characteristics of the previous earthquake
Differences between the 1957 and preceding earthquakes
"Characteristic" earthquakes
Coulomb stress changes and triggering of one fault by slip on another
Strike slip on the Bogd rupture triggering Gurvan bulag–Ölziyt Uul thrust slip
Thrust slip on the Gurvan bulag zone triggering strike slip on the Bogd rupture
Relevance to earthquakes elsewhere

Implications for recurrence intervals of major earthquakes and rates of deformation in the Gobi-Altay

Seismic moment tensor and regional deformation
Rates and amounts of slip and recurrence intervals between major earthquakes

Implications for intracontinental mountain building

Regional tectonics of the Ih Bogd region
Regional tectonics of the Baga Bogd region
Relationship to the rest of the Gobi-Altay and to intracontinental deformation in general
Acknowledgments

Appendix A: Sites where detailed topographic maps and profiles were made to quantify offsets
along the surface rupture of the 1957 Gobi-Altay earthquake in Mongolia

References cited