摘要
辽东地区古元古代裂谷里尔峪组和大石桥组中分别分布有富镁质的碳酸盐岩建造 ,其中产有硼矿、菱镁矿、滑石、岫岩玉等大型 -特大型矿床 .这些镁质非金属矿床的形成先与古元古代的蒸发岩系有关 ,然后经历了吕梁期区域变质和热液交代变质改造 ,以及印支、燕山期构造 -岩浆作用改造等成矿系统作用过程 .其中 ,镁质碳酸盐岩建造、成矿构造、成矿流体对镁质非金属矿床的形成起着重要的控制作用 .这些矿床也是古元古代矿源场、流体场、热场(能量场 )、应力场等在一定的时空条件下耦合和后期构造 -岩浆作用叠加改造的综合产物 .
In the Paleoproterozoic Lieryu Formation and Dashiqiao Formation, eastern Liaoning Province, China, are distributed the magnesium rich carbonate rock formations, where occur large to super large sized deposits of borax, magnesite, talc, and serpentine. The formation of these magnesian non metallic deposits related to the evaporites of the Paleoproterozoic experienced the regional metamorphism and the hydrothermal metasomatism during the Lüliang orogeny, and also the mineralization process of tectono magmatism during the Indosinian Yanshanian. In particular, the magnesian carbonate rock formations, minerogenetic structures and ore forming fluids played a key role in the formation of the magnesian non metallic deposits. Therefore, it can be concluded that these mineral deposits are end products of the integration of the coupling of the Paleoproterozoic ore source field, fluid field, thermal field (energy field) and stress field on certain time space conditions with the superimposed reformation of tectono magmatism in the later stage.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
2000年第4期346-351,共6页
Earth Science-Journal of China University of Geosciences
基金
原地质矿产部地矿行业科学技术发展基金资助项目!(No .HY97983 0 )
关键词
古元古代
镁质碳酸盐岩
非金属矿床
成矿系统
Paleoproterozoic
magnesian carbonate rock
non metallic deposit
minerogenetic system
eastern Liaoning Province.
