摘要
西秦岭礼岷金矿田分布五大花岗岩体 .经研究发现 ,该五大岩体沿“X”型共轭断裂侵位于泥质地层中 ,金矿床产于岩体外接触带的特定位置 ,形成于造山期后的伸展构造环境 .在共轭断裂剪切作用下 ,在岩体外接触带中形成挤压域和压影域非均匀应力场 ,金矿床仅限于压影域内 ,这是岩浆期后成矿热液向低压构造区迁移的结果 .据此 。
Five granite masses are distributed at Limin gold ore area in western Qinling, intruding along 'X' type conjugate faults in argillite. The gold mineral deposits are located at special domains outside the contact aureole of intrusive masses. Both of the intrusive masses and mineral deposits were formed under the condition of stretch tectonics at late orogenesis. By the process of conjugate shear faults, the inhomogeneous stress fields of compression domain and press shadow domain formed at the outer contact aureole of intrusive masses and gold mineral deposits formed in the domains of press shadow. These are the results of magmatic hydrothermal immigrated into the lower stress area. Under the guard of this mechanism, some more gold mineral deposits are discovered.
出处
《中南工业大学学报》
CSCD
北大核心
2002年第3期221-224,共4页
Journal of Central South University of Technology(Natural Science)
基金
国家自然科学基金资助项目 (4 0 0 0 2 0 18)
关键词
花岗岩体
共轭断裂
构造压影域
西秦岭礼岷矿田
granite mass
conjugate fault
press shadow domain
Limin gold deposit
western Qinling
