山东招远界河金矿床断裂构造特征及其控矿规律
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摘要
界河金矿床为胶东地区典型的蚀变岩型金矿床,矿床产于望儿山断裂的北段,矿体的产出严格受断裂构造控制。矿区断裂构造主要由F1、F2主断裂及一系列次级断裂组成,矿体主要受F1主断裂控制。主断裂沿走向及倾向均呈现波状起伏的特征,其在主成矿期具有左型走滑的正断层性质。主断裂面凸凹转换部位对成矿最有利,其控制了矿体沿走向呈似等距性分布以及向南西侧伏的规律。次级断裂的类型以及构造岩的类型和破碎程度控制了不同的矿化类型。次级节理裂隙发育的频度控制着裂隙脉型矿化的强弱,形成了在主断裂与次级断裂收敛部位富集成矿的"断夹片式"控矿构造模式。通过断裂构造控矿规律分析推断,在Ⅰ号矿体深部存在一定的找矿前景。
Jiehe gold deposit,a typical altered rock type gold deposit in Jiaodong area,occurs in northern Wang'ershan fault zone and is strictly controlled by fracture structures.The fracture structure of the deposit consists of the main fractures,F1 and F2,and a sequence of subfractures.The orebody is mainly controlled by F1 fracture.The main fracture surface that is a normal fault of sinistral strike-slip in the main metallogenic stage presents undulation along trend and tendency.The transferring sites between concave and convex of the fracture surface are the favorable places where gold orebodies occur,which also has controlled the regularities of the equidistant distribution of gold deposit along strike and the lateral trending of northeast-southwest.The degrees of mineralization are controlled by the types of secondary faults,the types and fragmentation degrees of the tectonite.The frequency of secondary joint fissure control the mineralization intensity of fissure vein type,and it established a model of broken clamping piece type that the minerals are enriched at the convergence site between the main fracture and the sub.Based on the study of the fault-controlled regularities,it is inferred that there are good prospects of mineral exploration in deep orebody Ⅰ.
Jiehe gold deposit,a typical altered rock type gold deposit in Jiaodong area,occurs in northern Wang'ershan fault zone and is strictly controlled by fracture structures.The fracture structure of the deposit consists of the main fractures,F1 and F2,and a sequence of subfractures.The orebody is mainly controlled by F1 fracture.The main fracture surface that is a normal fault of sinistral strike-slip in the main metallogenic stage presents undulation along trend and tendency.The transferring sites between concave and convex of the fracture surface are the favorable places where gold orebodies occur,which also has controlled the regularities of the equidistant distribution of gold deposit along strike and the lateral trending of northeast-southwest.The degrees of mineralization are controlled by the types of secondary faults,the types and fragmentation degrees of the tectonite.The frequency of secondary joint fissure control the mineralization intensity of fissure vein type,and it established a model of broken clamping piece type that the minerals are enriched at the convergence site between the main fracture and the sub.Based on the study of the fault-controlled regularities,it is inferred that there are good prospects of mineral exploration in deep orebody Ⅰ.
引文
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[18]范永香,阳正熙.成矿规律与成矿预测[M].徐州:中国矿业大学出版社,2003.
[2]杨立强,邓军,葛良胜,等.胶东金矿成矿时代和矿床成因研究述评[J].自然科学进展,2006,16(7):797-802.
[3]赵利青,李自杰,苑保钦,等.山东省界河金矿床地质特征及成矿预测[J].黄金地质,1995,1(4):25-31.
[4]崔天顺,齐金钟.山东界河金矿黄铁矿的成因矿物学与找矿矿物学[J].桂林冶金地质学院学报,1992,12(4):342-350.
[5]史文胜,曹新志,孙华山,等.山东招远市界河金矿黄铁矿标型特征研究及其找矿意义[J].地质找矿论丛,2008,23(2):113-119.
[6]曹新志,高秋斌,王来峰,等.山东招远市界河金矿床矿体定位规律及定位预测[J].地球科学,1999,24(5):484-486.
[7]曹新志,高秋斌,徐伯骏,等.矿区深部矿体定位预测的有效途径和方法研究——以山东招远界河金矿为例[M].武汉:中国地质大学出版社,2005.
[8]曹新志,高秋斌,徐伯骏,等.山东招远界河金矿床地球化学元素统计分析特征研究[J].地质找矿论丛,1999,14(2):30-35.
[9]高秋斌,曹新志,徐伯骏.控矿断裂面形态与工业矿体定位空间关系研究——以山东界河金矿为例[J].黄金,1999,20(11):1-3.
[10]邓军,徐守礼,吕古贤,等.胶东西北部断裂构造与成矿作用研究[J].现代地质,1996,10(4):502-511.
[11]范永香,高秋斌.山东招远—掖县金矿带构造控矿规律研究[M].武汉:中国地质大学出版社,1993:1-76.
[12]李洪杰,戚静洁,马树江.胶西北地区金矿床构造控矿规律[J].黄金科学技术,2010,18(4):41-46.
[13]宋明春,崔书学,姜洪利.山东胶西北矿集区和焦家金矿田成矿构造系统[J].地质通报,2011,30(4):573-578.
[14]翟裕生,林新多.矿田构造学[M].北京:地质出版社,1993.
[15]李治堂.陕西洛南大王西峪金矿主要地质特征[J].陕西地质,1988,6(2):1-11.
[16]刘石年.山东玲珑式金矿床矿体空间定位形式及其形成机制的探讨[J].地球科学,1984,28(4):47-56.
[17]孙丰月,石准立,冯本智.胶东金矿地质及幔源C-H-O流体分异成岩成矿[M].长春:吉林人民出版社,1995.
[18]范永香,阳正熙.成矿规律与成矿预测[M].徐州:中国矿业大学出版社,2003.