[DISCO] DISCO - Drilling Investigation of Seismogenic Crust in Oklahoma

ICDP-Topics:
Climate & Ecosystems


Year of Application: 2017

Expedition ID: 99999

Current Status: workshop approved

crystalline basement
DISCO
fault-zone drilling
ICDP-2017/13
induced seismicity
north america
oklahoma
stress state
U.S.A.
Master Data

Prof. Dr. Torsten Dahm (PI)
Prof. Dr. Marco Bohnhoff (PI)

Dr. Thomas Wiersberg (Workshop Participant)

Projektstart:
Projektdauer:
Geologisches Alter:

Latitude: 36°20'11''N
Kontinente:

North America

Regionen & Städte:

Longitude: 96°48'5''E
Länder:

United States

Themen:

Drilling Data

Drilling Depth:
Core Yield:
Core Length:
Amount of Drill Holes:
Amount of Drill Locations:

Core Length-Drill Depth-Ratio:
Core Yield-Core Length-Ratio:

Description

The drastic, unexpected surge of earthquake activity in the central United States since 2009 has alarmed the public, and resulted in the release of a one-year earthquake hazard map for the central US. Not just an Oklahoma concern, induced earthquakes have also been observed throughout other portions of North America (Colorado, Arkansas Texas, Ohio, Kansas, Illinois western Canada) and the world (Switzerland, southern Italy, Germany, and the Netherlands). The recent earthquakes occurring in Oklahoma, including the September 3rd, 2016, M5.8 Pawnee earthquake, nucleated at depths well within the igneous basement. Although much is known about the shallow sedimentary sequences in Oklahoma, where oil and gas are produced, little is known about the structure and insitu properties of the underlying igneous basement, where the largest and most damaging earthquakes originate. The target is a drilling project into the seismogenic, igneous basement of Oklahoma near and across a causative fault of a M5+ earthquake. Such a project will provide a better understanding the processes and conditions leading to the observed fluid-induced seismicity.