柿竹园多金属矿床的分形时-空结构——以矽卡岩矿物中Sn等成矿元素分布特征为例

湖南柿竹园W, Sn, Mo, Bi多金属矿床是一个特大型矿床, 其成矿系统极其复杂, 表现为多层次、多子系统.通过微区成分分析等手段, 详细地研究了该矿床块状矽卡岩石榴子石等矿物中Sn, W, Bi等元素的分布, 证实了Sn等元素的质量分数在矿床宏观分布上和矿物内部微观分布上, 均具幂律分布规律, 即具分形时-空结构.Sn元素在石榴子石中分布的分形维为1.7;在符山石中的分形维为1.8;在后期绿帘石中的分形维为1.9.从矿物晶体微观成矿元素的分布特征来看, 成矿巨系统常处于临界状态, 当其受到扰动, 就产生响应, 通过间断性阵发-平衡(相对静止) 的往复而复归临界状态, 这种自组织的临界状态是该矿床动力学的最基本特点. 

FRACTION-DIMENSIONAL TIME-SPATIAL STRUCTURE OF MULTI-METALLIC DEPOSIT IN SHIZHUYUAN: MINERALIZED Sn AND OTHER ELEMENTS IN GARNET AS AN EXAMPLE

The W, Sn, Mo, Bi multi-metallic deposit in Shizhuyuan, Hunan is a very large deposit. Its mineralized system is very complex, containing multilayers and many subsystems. By micro-area chemical analysis, the distribution of Sn, W, Bi in the garnet of massive skarn is studied. It is confirmed that the contents of Sn and other elements possess the characteristics of power-rate in macro-scale and micro-scale, i.e. fraction-dimensional time-spatial structure. The fraction-dimension of Sn is 1.7 in garnet, 1.8 in vesuvianite, and 1.9 in anaphase epidote. From the micro-distribution characteristics of mineralized elements in mineral crystals, mineralized large-system was always critical, when it was disturbed, it would return to critical state by discontinuously reacting-equilibrating, this type of self building-up critical state is the fundamental dynamic characteristics of the deposit.