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To better understand the spatial heterogeneity of the lithospheric mechanical structure and its tectonic evolution in western Hubei and adjacent areas, this study calculates and analyzes the elastic lithosphere thickness (Te) and deviatoric stress based on WGM2012 gravity field data, Crust1.0 model data, and ETOPO1 topographic data. The results indicate that: 1) The elastic lithosphere thickness exhibits significant spatial variation (5 to 50 km). The western margin of the Yangtze craton, including the Sichuan basin and Wuling overthrust (Te>30 km), represents high-strength stable regions, whereas the Jiangnan orogenic belt (Te < 20 km) constitutes a weak lithospheric zone; 2) The effective lithospheric thickness is negatively correlated with surface heat flow. The Wuling overthrust, as a cold lithospheric block, is characterized by low heat flow values (< 50 mW/m2) and thick Te; 3) Seismic activity is controlled by the coupling of Te and deviatoric stress. The western margin of the Sichuan basin exhibits low Te values and a high deviatoric stress background (10 to 15 MPa), corresponding to earthquake clustering, whereas the Jiangnan orogenic belt, with low Te and deviatoric stress generally below 3 MPa, experiences fewer seismic events. Regional seismic hazard assessment requires a comprehensive consideration of the coupling between elastic lithosphere thickness and deviatoric stress field.
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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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