关于成矿参数临界转换的探讨
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摘要
在成矿过程中 ,普遍存在成矿参数的临界转换现象。在制约成矿临界转换的参数和多种形式中 ,构造动力转换可能起着根本的作用。文章以山东焦家、阜山等矿床为例 ,列举剪切带构造中的临界转换现象。又以火山爆发和地震为例 ,说明构造动力体制转换诱发的突发地质事件及伴随的成矿作用。在说明构造动力转换的多重尺度后 ,重点论述了整体构造背景下的局部转换 (例如总体挤压背景下的局部拉张、总体拉张盆地中的局部封闭 )是一常见的矿源_运输_汇聚结构。在构造动力体制转换带动下 ,多种参数的联动转换是形成大型矿床的一种机制
Critical transition of ore_forming parameters is one of the main topics in the metallogenic researches. Among the parameters that control the ore_forming critical transition, tectonic dynamic transformation seems to play the most important role. Taking the Jiaojia and the Fushan gold ore deposits as examples, this paper enumerates some critical transforming phenomena in gold_bearing shear zones, and also exemplifies incident geological events and accompanying mineralization induced by the transition of tectonic dynamic mechanism through volcanic explosion and earthquake. Following an illustration of the multi_scale nature of tectonic dynamic transition, this paper stresses that local transition under a certain tectonic setting is a common ore source_transportation_enrichment structure (e.g. local extension under compressional tectonic setting, local closing in an extensional basin). Coupling transitions of many ore_forming parameters induced by the tectonic dynamic transition is one of the mechanisms forming large_size ore deposits.
Critical transition of ore_forming parameters is one of the main topics in the metallogenic researches. Among the parameters that control the ore_forming critical transition, tectonic dynamic transformation seems to play the most important role. Taking the Jiaojia and the Fushan gold ore deposits as examples, this paper enumerates some critical transforming phenomena in gold_bearing shear zones, and also exemplifies incident geological events and accompanying mineralization induced by the transition of tectonic dynamic mechanism through volcanic explosion and earthquake. Following an illustration of the multi_scale nature of tectonic dynamic transition, this paper stresses that local transition under a certain tectonic setting is a common ore source_transportation_enrichment structure (e.g. local extension under compressional tectonic setting, local closing in an extensional basin). Coupling transitions of many ore_forming parameters induced by the tectonic dynamic transition is one of the mechanisms forming large_size ore deposits.
引文
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丁式江.1998.绿岩型金矿综合地质异常研究———以胶东焦家金矿为例[D].[博士论文].北京:中国地质大学.指导教师:翟裕生.1～98.
顾留成,万国普,段林祥,等.1996.胶东破碎带蚀变岩型金矿床的地质_地球物理_地球化学模型及评价指标研究[M ].济南:山东科学技术出版社.178～193.
苗来成,罗镇宽,关 康,等.1997.山东招掖金矿带内花岗岩类侵入体锆石SHRIMP研究及其意义[J].中国科学(D辑),27(3):207～213.
孙启祯.2001.边缘成矿概论[M ].北京:地质出版社.1～158.
万天丰,朱 鸿.1996.中国及邻区各地块中新生代运动学特征与构造应力场[A].见:国家计委国土司、地矿部科技司编.地质科学研究论文集———献给第三十届国际地质大会[C].北京:中国经济出版社.119～124.
王集磊,何伯墀,李健中,等.1996.中国秦岭型铅_锌矿床[M ].北京:地质出版社.69～77.
翟裕生,林新多.1993.矿田构造学[M].北京:地质出版社.
翟裕生,张 湖,宋鸿林,等.1997.大型构造与超大型矿床[M ].北京:地质出版社.150～151.
翟裕生,邓 军,李晓波.1999.区域成矿学[M ].北京:地质出版社.
BarleyMEandGrovesDI .1992.Supercontinentcyclesandthedistri butionofmetaldepositsthroughtime[J].Geol.,20:291～294.
KerrichR .2000.Thecharacteristics,originsanddynamicsettingofsu pergiantgoldmetallogenicprovinces[J].Sci.inChina(seriesD),43(supplement):1～81.
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