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矿床位于秦岭海西褶皱带的东端、荆紫关—师岗复向斜北翼,区内出露地层为震旦系上统,寒武系及奥陶系中、下统的一套碳酸盐岩系。地层走向北西西。米黄玉大理石主要赋存在奥陶系中的北东(30—50°)走向的张扭性断裂内。矿体呈脉状,其走向为北东30—50°,倾向北西或南东,倾角70—85°间,其规模一般长400—1500米,最长2400米,宽一般5—10米,最宽可达20余米。矿脉(体)系由若干单层大理石组成,单层厚一般30—80厘米,最厚可达120厘米。大理石呈米黄色或松香黄色,平行纤维状结构,栉状构造。矿物成分几乎全由方解石组成,含微量的铁质及锰质。方解石大多为柱状,少数为粒状和隐晶质粒状,柱状方解石粒径一般为10—20毫米,最大可达30—40毫米,平行排列,晶体的长轴方向与脉壁垂直。矿石的化学成分百分含量:CaO:53.93—55.29,MgO:0.39—1.04,SiO_2:0.06—1.05,Al_2O_3:0.10—0.57,Fe_2O_3:0.05—0.25,烧失量43.02—43.46。矿石加工成板材后,磨光面上的花纹依其形象划分,主要为图案形平行栉状花纹,少数为同心圆状或放射状花纹。磨光性能良好,其光泽度为95—104°,抗压强度为217—414kg/cm~2,抗折强度133—279kg/cm~2,溶重和吸水率均符合国家规定的标准。矿体理论成荒率为36.41％。锯板效率平均可达4厘米/小时,板材净出材率为18—80平方米/立方米。矿床成因探讨,属侧分泌矿床。
The deposit is located in the eastern end of the Hercynian fold belt in the Qinling Mountains, north of the Jingziguan-Shigang compound syncline. The exposed strata in the area are a set of carbon of the Sinian, Cambrian and Ordovician Middle and Lower Reaches Acid rock series. Stratum to the north west. Beige jade marble mainly exists in the Ordos in the northeast (30-50 °) to the tensile torsional fracture. The ore body is vein-shaped, and its direction is 30-50 ° North East, with a tendency of northwest or south east, dip angle of 70-85 °. Its size is generally 400-1500 meters long, 2400 meters long and 5-10 meters wide. The most up to 20 meters. Veins (body) is composed of a number of single-layer marble, single-layer thickness of 30-80 cm, the maximum thickness of up to 120 cm. Marble was beige or rosin yellow, parallel to the fibrous structure, pectinate structure. Almost all the mineral composition of calcite, with trace amounts of iron and manganese. Calcite mostly columnar, a few granular and cryptocrystalline granular, columnar calcite particle size is generally 10-20 mm, up to 30-40 mm, arranged in parallel, the long axis of the crystal and veins vertical. Ore chemical composition percentage: CaO: 53.93-55.29, MgO: 0.39-1.04, SiO_2: 0.06-1.05, Al_2O_3: 0.10-0.57, Fe_2O_3: 0.05-0.25, Loss on ignition 43.02-43.46. After the ore is processed into a plate, the patterns on the polished surface are divided according to their image, mainly in the form of pattern-shaped parallel pectinate patterns, a few of which are concentric or radial patterns. Polishing performance is good, the gloss is 95-104 °, the compressive strength is 217-414kg / cm ~ 2, the flexural strength is 133-279kg / cm ~ 2, the weight and water absorption are in line with the national standards. Ore volume rate of 36.41% for ore body theory. Saw the average efficiency of up to 4 cm / h, the net sheet rate of 18-80 square meters / cubic meter. Exploration of genesis, is a lateral secretion deposits.