内蒙古莲花山金矿区成矿应力场数值模拟与隐伏矿床预测

MODELLING OF MINERALIZATION STRESS FIELD AND CONCEALED DEPOSITS PREDICTION IN LIANHUASHAN GOLD-ORE FIELD OF INNER MONGOLIA

成矿过程是成矿物质的运动过程，有用元素的活化、迁移、稳定和集中，与“同成矿构造体系”活动时期地应力和能量的集中和构造发生时的释放息息相关。地应力和能量逐步积累，伴随地温升高和水分的参与，促使元素活化，地应力积累到一定程度导致地壳岩石变形、破碎和位移，又引起应力和能量的释放，活化了的元素便向应力降低的构造带集中从而形成矿床。全息光弹和数学模拟可以定量地计算出成矿时区域及矿田中应力和能量的分布状态及其变化，根据应力和能量的高值区与矿化集中的位置关系，可进一步确定矿脉中的富矿段，预测隐伏矿脉的位置，使矿的预测由定性提到定量的高度。

ineralization is the process of the movement of ore forming materials. The activation,migration and concentration of ore-forming elements closely correlates with the accumulation of stress and energy when 'the syn-metallogenic structural system' became active and with the release of stress and energy when the hast rocks fail. Ore-forming elements would be mobilized in consequence of continued accumulation of stress and energy,increase of temperature and the presence of water. The rise of stress would eventually cause the rock of the crust to be deformed,broken and dislocated,to release the stress and energy accumulated so that mobilized ore-forming elements migrate toward and concentrate in structural zones of reduced stresses. Photoelastic and mathematical modelling will give the distribution of stress and energy quantities in and around the region of ore deposits. The close link of the formation and distribution of ores with syn-metallogenic stress field may provide some hints for the known and blind deposits. A quantitative instead of qualitative ore prediction is thus stepping up.