Variations of gravity anomaly roughness in Chugoku district, Japan: Relationship with distributions of topographic lineaments

Abstract

Tectonic movement may disturb lateral continuities of crustal structures at weak zones. These lateral discontinuities of density structure cause undulations of the gravity anomaly field whose complexity can be an indicator of past crustal instability. On the other hand, topographic lineaments are formed along weak crustal zones. We would expect therefore that gravity anomaly roughness bears some relation to the distribution of surface lineaments. We develop a statistical method by employing the Bouguer anomaly standard deviation as an index of gravity anomaly roughness in terms of which we interpret the spatial distribution of topographic lineaments in Chugoku district, Japan. Locations of the lineaments, which could be diagnostic of the heterogeneity of the previously damaged crust, tend to coincide with those of high roughness areas of gravity anomaly fields.

Tectonics of Enceladus’ South Pole: Block Rotation of the Tiger Stripes

“…Lineaments result from alignments of tonal and morphological features in the topography (e.g., series of valleys and reliefs) and are enhanced by low‐angle illumination. On Earth, they are influenced by preferential erosion directions related to deformations induced by upper crustal stresses/kinematic conditions (Al Hseinat et al., 2020; Austin & Blenkinsop, 2008; Cianfarra & Salvini, 2014; Kudo et al., 2004; Milbury et al., 2007; Oakey, 1994; Rossi et al., 2018; Wise, 1982; Wise et al., 1985). Since few erosive agents are expected on Enceladus’ surface, lineaments are already discernible on the surface.…”

Understanding of Crustal Activity with Statistical Approaches: I. Construction of Spatiotemporal Database with a Unified Data Format

“…(Gutenberg and Richter, 1956) within 30 km search radius, (d) the number of earthquakes within 30 km search radius, (e) lower limit of earthquake distribution (D90) (f) gravity anomaly roughness (Kudo et al, 2004), and (g) long wavelength component (῍100 km) of geothermal gradient (Tanaka et al, 2004), respectively, over the Japanese islands. (Fig.…”

Imaging of subsurface lineaments in the southwestern part of the Thrace Basin from gravity data

“…The Radon transform was employed by Pawlowski (1997) and Zhang et al (2005Zhang et al ( , 2006 to improve the potential field anomalies and position the lineaments. Kudo et al (2004) developed a statistical method to investigate the spatial distribution of topographic lineaments by employing the Bouguer anomaly standard deviation as an index of gravity anomaly roughness. Their study focuses on the relationship between the complexity of gravity anomalies and the distribution pattern of topographic lineaments.…”