中文摘要：

辽宁红透山块状硫化物矿石主要矿物成分为黄铁矿、磁黄铁矿、黄铜矿、闪锌矿、石英、角闪石和黑云母等。将矿石切成圆柱体，用20％NaCl溶液浸泡260h后装入长江500型活塞一圆筒式三轴应力试验机，分别在362℃、464℃、556℃和682℃，以及不同的围压和轴压下进行实验，13h后于空气中自然冷却。实验产物中各种矿物发生了强烈的机械变形，黄铁矿和角闪石以脆性破裂为特征，而磁黄铁矿、黄铜矿、闪锌矿、石英和黑云母以塑性变形为主，局部也发生脆性破裂。 实验过程中硫化物发生了强烈的化学再活化，其产物主要有细脉和微晶两种。再活化细脉主要穿插黄铁矿碎斑，而在黄铜矿、磁黄铁矿、闪锌矿和脉石矿物中未曾见到。细脉成分主要为黄铜矿，其次为磁黄铁矿，仅含少量闪锌矿。脉中磁黄铁矿颗粒较大，在超过200μm的长度内光性连续，表明这些脉形成于冷却前的较高温度环境。随实验温度的升高，再活化细脉的数量也随之增加，而且脉中黄铜矿对于磁黄铁矿的比例也加大。再活化微晶可进一步分为两种：一种为分布于同种硫化物碎粒之间或增生于碎粒之上的黄铁矿、磁黄铁矿和黄铜矿微晶；另一种为沿黄铜矿裂隙分布的完全由黄铁矿构成的蠕虫状体。以这两种方式产出的微晶均为实验样品冷却过程中的产物。在556℃和682℃的产物中还出现黄铜矿对黄铁矿的交代反应现象。 本文的实验结果表明，块状硫化物矿石中的硫化物在变形变质过程中可同时以机械的和化学的两种方式发生再活化，并且再活化强度随温度的升高而升高。但是，机械再活化的距离和所造成的各种矿物间的分异都十分有限，只有化学再活化才是造成组分长距离迁移，形成新矿体的重要机制。脆性变形区的张性空间有利于再活化流体的运移和卸载，而韧性

英文摘要：

Massive sulphide ore from Hongtoushan of Liaoning province comprise pyrite, pyrrhotite, chalcopyrite, sphalerite, quartz and silicate minerals. The ore was cut into cylinders 40 mm in length and 17 mm in diameter, immerged in a solution of 20% NaCl for 260 hours, and then was mounted in a triaxial rock stress machine Changjiang 500. The experiments were performed under various confining and axial pressures for 13 hours at temperatures of 362, 464, 556 and 682℃, respectively, and then the samples were cooled at the room temperature for 24 hours. Strong mechanic deformation was observed in various minerals after the experiment. The pyrite and hornblend are characterized with brittle cracking, while the pyrrhotite, chalcopyrite, sphalerite, quartz and biotite are characterized by plastic deformation, with brittle distortion locally. During the experiment, sulphides were reactivated intensely, and the main products are veinlets and microcrystallites, with the former occurring mostly in fragments of pyrite porphyroclasts but not in chalcopyrite, pyrrhotite, sphalerite and gangue minerals. These veinlets consist mainly of chalcopyrite with lesser pyrrhotite, and minor sphalerite. Pyrrhotite in the veinlets commonly shows optical continuity over a length of 200 μm, implying that it was formed by slow crystallization at relatively higher temperatures. The amount of reactivated veinlets increased with temperature increasing, so did chalcopyrite/pyrrhotite ratio in the veinlets. Reactivated sulphide microcrystallites can be either irregular or rod--like in shape, and were formed during cooling of the runs. Irregular mieroerystallites that fill the spaces between fragments of the same mineral include all sulphides in the runs, whereas those rodlike shape and filling fissures of chalcopyrite to form worm-like bodies are almost pure pyrite. In addition, replacement textures of pyrite by chalcopyrite was found in the experimental products at 556℃ and 682℃. Present experimental results indicate that the sulphides can be