Applications of Vitrinite Anisotropy in the Tectonics: A Case Study of Huaibei Coalfield, Southern North China

Figure 5

Correlation between 𝑅_max and 𝑅_ev for the anthracites. Region A: 𝑦=(0.866∗𝑥)+0.057 (coef. of determination, 𝑟²=0.956); Region B: 𝑦=0.888𝑥+0.031 (coef. of determination, 𝑟²=0.980); Region C: 𝑦=(0.838∗𝑥)+0.063 (coef. of determination, 𝑟²=0.965); 𝑅_max: maximum reflectance; 𝑅_ev: Reflectance of equivalent volume isotropic RIS, (𝑅_max×𝑅_int×𝑅_min)^1/3.

(a)

(b)