环渤海地区非金属矿地质特征

Geological Characteristics of the Nonmetal Ore Deposits in Circum-Bohai-Sea Region

环渤海地区非金属矿产品种繁多、分布广泛、资源丰富、经济效益明显。区内已发现非金属矿种近80种,已探明小型以上矿产地1 294个(其中超大型矿床22个,大型矿床232个,中型矿床497个)。其中菱镁矿、金刚石、滑石、硼、耐火黏土、玉石、硅灰石、石墨、硫、磷、石膏、珍珠岩、澎润土和芒硝等是本区的优势矿产,已探明小型以上矿产地436个。这些矿产主要分布在胶辽、鲁西、燕山、太行山—吕梁山和内蒙古等地。单矿种区域分布极不均匀,如硼矿床、菱镁矿床集中分布于辽东地区,金刚石集中分布于鲁西和辽南地区。此外辽宁、河北、天津、山东还是我国北方海盐的主要产区。该类矿床成因有风化型、沉积岩型、变质岩型、热液型、岩浆岩型等五大类,其形成时代自太古代始,各个地质时代都有产出。

Abundant normetal ores widely spread in Circum-Bohai-Sea Region. About 80 catigories nonmetal ore have been found. 1 294 normetal deposits including 22 supper large ores,232 large ones, 497 middle ones have been explored. Magnesite, diamond, talc, boron, jade, rivaite, graphite, sulphur, phosphorus, gyps, pearlite, bentonite and glauber salt are advantageous ores,which mainly distribute in Jiaoliao, Luxi（west of Shandong）, Yanshan,Taihang-Luliang mountains and Inner Mongolia autonomous region. Liaoning, Hebei, Shandong province, Tianjin has predominant sea salt prod- ucting areas in north China. The nonmetal ores can be divided into 5 genetic types：weathering,sedimentary,metamorphic, hydrothermal and magmatic types. The ore formation is in every geological era, and mainly in Palaeozoic.