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Under an elastic Earth model, clear analytical solutions exist for surface gravity changes induced by a single strike-slip fault. However, the quantitative relationship between multiple fault zones and their geometric parameters with the resulting surface gravity change patterns remains unclear. Based on dislocation theory in an elastic half-space, this paper systematically investigates the quantitative connection between the geometric parameters of parallel strike-slip dislocation sources and the characteristics of the surface gravity change patterns through numerical simulations. Using the control variable method, we separately analyze the influence of fault length (L), width (W), slip amount (K), number of faults (N), dip angle (δ), and top depth (dep) on the four-quadrant distribution pattern and amplitude of the gravity anomaly. The results show that: 1) Fault length L is linearly positively correlated with the distance between gravity extremal points along the fault strike (X-direction). 2) Increasing fault width W elevates the gravity anomaly amplitude, but the growth trend diminishes, without altering the four-quadrant structure. 3) The strike-slip width K is linearly positively correlated with the distance between gravity extremal points along the Y-direction, but negatively correlated with the gravity anomaly amplitude. 4) An increase in the number of strike-slip faults N leads to a linear increase in the gravity change amplitude. 5) Variations in the dip angle δ affect the symmetry of the gravity change pattern. 6) An increase in the top depth dep causes a significant increase in the distance between extremal points in the Y-direction. 7) The fault center position (sx, sy) coincides with the four-quadrant symmetric center of the gravity change pattern, and the line connecting a pair of extremal points in the X-direction aligns with the fault strike angle α. In summary, the main geometric parameters of multiple dislocation sources can be determined based on observed gravity change patterns.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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