oa Faulting and Clay Gouging in Neogene Clastics of the Lambir Fm., Sarawak

The new coastal Miri-Bintulu road intersects, near the Tusan junction some 40 km South of Miri, a series of normal faults, vested in a 80 deg dipping clastic sequence located near to the core of the complex Lambir Anticline are observed. The outcrop shows beautiful examples of clay gouging, fault drag and concussion. Faults have been measured and correlated (Figs. 1, 2). Clay gouging indicate a correlation between gouging thickness and fault throw (Fig. 3). Development of fault rock (Fig. 4) is noted within<br>competent (hence brittle) sandstone units, regardless of hanging wall or footwall position, whereas clay bodies react ductile and show fault drag. The authors intend to further investigate the clay gouge sealing capacity, calibrate the outcrop data with modeling packages such as FaultRiskTM, and approach industry players for sponsorship.