赣南漂塘钨矿节理特征及其对成矿作用影响
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摘要
目的漂塘钨矿是石英细脉带型黑钨多金属矿床,处于武夷山NE-NNE向构造带南段与南岭EW向构造带东段的复合部位。矿区内构造运动具有多旋回的特征,矿区内共轭剪节理广泛发育。采用绘制节理等密度图法确定优选产状及矿区节理分布特征,并进一步分析成矿时的主应力方向。方法统计大量的矿脉数据并结合测量的共轭节理数据来分析成矿流体充填与节理和矿脉的关系。结果通过研究发现,漂塘矿区共轭剪节理优选产状360°∠69°和216°∠56°,矿脉优选产状359°∠65°和210°∠56°,两者基本一致,节理可能是成矿时矿液的流通通道和赋矿场所。成矿时最大主应力σ1的优选方向是119°∠59°,最小主应力σ3的优选方向是283°∠30°,中间主应力σ2的优选方向是17°∠7°。结论最大主应力优选方位与矿区断层走向近垂直,推测节理可能是漂塘钨矿的控矿构造之一。
Objective The Piaotang tungsten deposit is a large-scale quartz vein-type tungsten polymetallic deposit.It is located in the intersection of Nanling and Wuyi Mountain tectonic belts.Tectonic activites demonstrate multiple tectonic cycles.Faults and conjugated joint are complicated.Methods Joints density map was used to determinate the preferred orientation of joints and the characteristic distribution of joints in deposit,and then the main stress direction during the mineralization was analyzed.Statistical analysis and comparison of data from veins and joints were performed to speculate the relationship of joints and mineralization.Results The main results demonstrated similarity between preferred attitudes of conjugated joint(360°∠69° and 216°∠56°)and preferred attitudes of vein(359°∠65° and 210°∠56°),which implied that joints in deposit area provided channel and place for mineralization.The preferred attitude of max stress(σ1)was 119°∠59° and the min stress(σ1)attitude was 119°∠59°,the medium stress(σ2)attitude is 17°∠7°.Conclusions The preferred attitude of max stress is nearly vertical to the strike of fault,which implied that the joint is one of the ore-controlling structures in Piaotang deposit area.
Objective The Piaotang tungsten deposit is a large-scale quartz vein-type tungsten polymetallic deposit.It is located in the intersection of Nanling and Wuyi Mountain tectonic belts.Tectonic activites demonstrate multiple tectonic cycles.Faults and conjugated joint are complicated.Methods Joints density map was used to determinate the preferred orientation of joints and the characteristic distribution of joints in deposit,and then the main stress direction during the mineralization was analyzed.Statistical analysis and comparison of data from veins and joints were performed to speculate the relationship of joints and mineralization.Results The main results demonstrated similarity between preferred attitudes of conjugated joint(360°∠69° and 216°∠56°)and preferred attitudes of vein(359°∠65° and 210°∠56°),which implied that joints in deposit area provided channel and place for mineralization.The preferred attitude of max stress(σ1)was 119°∠59° and the min stress(σ1)attitude was 119°∠59°,the medium stress(σ2)attitude is 17°∠7°.Conclusions The preferred attitude of max stress is nearly vertical to the strike of fault,which implied that the joint is one of the ore-controlling structures in Piaotang deposit area.
引文
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[19] 蔡汝青.共轭节理研究及区调中的应用[J].江西地质,1999(13):247-254.
[20] 俞胜,白永波,等.肃北县德勒诺尔铁矿区构造应力场分析[J].甘肃地质,2012(21):15-22.
[21] HE Z Y,XU X S,ZOU H B,et al.Geochronology,petrogenesis and metallogeny of Piaotang granitoids in the tungsten deposit region of South China[J].Geochemical Journal,2010(44):299-313.
[22] 韦德贵,贺灵,等.湖南桂阳县黄沙坪铅锌矿区岩石节理特征及其地质意义[J].矿山与地质,2007(21):555-559.
[2] 徐开礼,朱志澄.构造地质学[M].北京:地质出版社,1985:1-385.
[3] 万天丰.古构造应力场[M].北京:地质出版社,1988:20-94.
[4] 江西冶金地质勘探二队.江西南部钨矿资料汇编[R].赣州:江西冶金地质勘探二队,1978.
[5] 聂荣锋,王旭东.赣南钨矿研究进展[J].中国钨业,2006,22(03):1-5.
[6] 李中兰,梅勇文.赣南钨矿分布规律及隐伏矿床预测[J].江西地质,1999,13(04):276-282.
[7] 朱焱龄,李崇佑.林运淮.赣南钨矿地质[M].南昌:江西人民出版社,1981:1-440.
[8] 徐克勤,程海.中国钨矿形成的大地构造背景[J].地质找矿论丛,1987,2(03):1-7.
[9] 曾载淋,朱祥培,等.赣南钨矿资源状况与资源远景展望[J].中国钨业,2007,22(06):16-18,42.
[10] 张文兰,华仁民,王汝成,等.赣南漂塘钨矿花岗岩成岩年龄与成矿年龄的精确测量[J].地质学报,2009,83(05):659-670.
[11] 梅勇文.西华山-棕树坑地区钨矿分布规律[J].地质与勘探,1985,21(04):11-16.
[12] 宋永国.漂塘矿区矿块底部结构设计与应用探讨[J].有色金属,2004,56(05):10-18.
[13] 朱俊.中国钨资源前景探讨[J].中国钨业,1997(11):11-14.
[14] 杨明桂,卢得揆.西华山-漂塘地区脉状钨矿的构造特征与排列组合形式[C]//余彰.钨矿地质讨论会论文集.北京:地质出版社,1984:293-303.
[15] 山峰.某石英细脉带型钨锡矿床地质特征[J].地质学报,1976(01):1-16.
[16] 古菊云.华南脉钨矿床的形态分带[C]//余鸿彰.钨矿地质讨论会论文集.北京:地质出版社,1984:35-45.
[17] 周利敏.江西省全南县大吉山钨矿构造应力场数值模拟与成矿预测[D].北京:中国地质大学,2009.
[18] 谢明璜,郭家松,王定生.江西大吉山钨矿容矿裂隙演化及与成矿关系探讨[J].中国钨业,2011(05):1-5.
[19] 蔡汝青.共轭节理研究及区调中的应用[J].江西地质,1999(13):247-254.
[20] 俞胜,白永波,等.肃北县德勒诺尔铁矿区构造应力场分析[J].甘肃地质,2012(21):15-22.
[21] HE Z Y,XU X S,ZOU H B,et al.Geochronology,petrogenesis and metallogeny of Piaotang granitoids in the tungsten deposit region of South China[J].Geochemical Journal,2010(44):299-313.
[22] 韦德贵,贺灵,等.湖南桂阳县黄沙坪铅锌矿区岩石节理特征及其地质意义[J].矿山与地质,2007(21):555-559.