湘西泸阳县的白沙镇西侧羊角岭发育了一条含油超浅成脆韧性剪切带。该剪切带中的主体岩石是含凝析油瘤状灰岩，其形成深度不超过３０００ｍ，岩石中的一般有机质（沥青）反射率Ｒｏ值介于０６９％～０７２％之间，处于低中成熟阶段，而其中的部分沥青体则发育了强烈的光学各向异性，其Ｒｏ，ｍａｘ为２５２％～３２０％，Ｒｏ，ｍｅｄ为１０１％～１８４％，Ｒｏ，ｍｉｎ为０３４％～０８１％，最大双反射率值可达８７％。白沙含油超浅成脆韧性剪切带的各向异性体呈不规则碎片状或细条带状，根据其形态及“消光”特点可以分为椭球状、羽状、条带、环状、螺旋状等几种，其成因与岩浆热液作用（叠加了部分构造应变）有关。凝析油也是岩浆热液作用的产物。 Western Hunan Luyang County, Baisha Town, Western Cape development of an ultra-shallow oil into brittle ductile shear zone. The main rock in the shear zone is condensate-bearing limestone with a depth of 3000 m or less. The reflectance of typical organic matter (bitumen) in rocks ranges from 069% to 072% , While in the middle and low maturity stages, some of the asphalts developed strong optical anisotropy with Ro and max of 252% ~ 320% and Ro and med of 101% ~ 184 %, Ro, min is 034% ~ 081%, the maximum double reflectance value is up to 87%. The anisotropy of the ultra-shallow, brittle and ductile shear zone in the Baisha oil is irregularly shredded or ribbon-shaped. According to its shape and extinction characteristics, it can be divided into ellipsoid, plume, band, ring, spiral And other several, its cause and magmatic hydrothermal effect (superimposed on part of the tectonic strain). Condensate is also the product of magmatic hydrothermal activity.