摘要
辽宁岫玉以颜色鲜艳，质地细腻，硬度适宜，加工性好而驰名国内外。辽河期黑云二长花岗岩与镁质碳酸盐岩接触带为成矿有利地段。辽河群大石桥岩组含石英菱镁大理岩为矿源层，其层间东西、北西、北东向压扭性断裂为控矿和储矿构造，矿体产于高温高压 SiO2不饱和的封闭型地质环境中。属早元古代层控＋裂控型受变质热液矿床。
Xiuyan jade is famous at home and abroad in bright-coloured， fine-grained,favourable hardness and processing. In the Xiuyan jade deposits, the ore-forming favourable sections are in the contact zone between biotite adamellite and magnesian carbonate of Liaohe age, the source bed is quartz-bearing magnesite marble in Dashiqiao fabric of Liaohe Group,the impounding structure is EW-,NW-and NE-trend interstratified compresso-shearing faults, and the orebodies occur in an enclosed environment of high T-P and SiO2 undersaturated. The Xiuyan jade deposits are of Early Proterozoic strata-and fault-bound metamorphosed hydrothermal deposits.
