在1∶5万土壤测量和矿产重点检查的基础上，对塔布格地区的AP22号金异常结合成矿地质特征开展了研究，发现该Au异常元素组合配套好，特征显著，多元素异常空间结构与其他成型金矿床地球化学异常空间结构可对比，可见该异常区具备较好的找金矿前景。该金异常空间分布严格受上二叠统方山口组地层控制，金矿化体主要赋存在英安质火山尘埃凝灰岩内。该地区晚二叠世属活动大陆边缘的火山弧，阿拉善变质基底在该时期受到中亚造山带碰撞造山作用的强烈影响和改造，发生物质再循环而形成喷出岩，成矿作用亦随之发生。尽管如此，在该地区的地质找矿历来都未给予古生代地层足够的重视。因此，在阿拉善地块区今后的找矿科研工作中，应注意加强对海西-印支期喷出岩含矿性的评价。
Based on the 1∶50 000 scale soil measurement and priority examination of minerals ,researches on the anomaly of AP22 in the Tabuge District and the metallogenic geological characteristics are carried out .The results showed that this Au anomaly has a good cross combination ,a remarkable characteristic and a good comparison of its spatial structure of multielement anomalies with those of geochemical anomalies in molding gold deposits , indicating this area has good prospecting potentials for gold deposits .The spatial distribution of this Au anomaly is strictly con-trolled by the strata of Fangshankou Formation ,Upper Permian.Gold mineralization body is hosted mainly in the dacit-ic volcanic dust tuff .The study area is located in volcanic arc along the active continental margin at late Permian ,the Alxa metamorphic basement was affected and reformed by the collision orogeny of Central Asian orogenic belt ,the ex-trusive rock was formed in the material recycling process ,in which mineralization also happened .Even so,no attention has been paid to the paleozoic strata in this area in prospecting and exploration ,so the paper holds the point that more attention should be paid to the bearing potentiality evaluation in Hercynian-Indosinian extrusive rocks in future pros-pecting and exploration work in the district .
参考文献
| [1] | 耿元生,王新社,吴春明,周喜文.阿拉善变质基底古元古代晚期的构造热事件[J].岩石学报,2010(04):1159-1170. |
| [2] | 耿元生,周喜文.阿拉善地区新元古代早期花岗岩的地球化学和锆石Hf同位素特征[J].岩石学报,2011(04):897-908. |
| [3] | 耿元生,王新社,沈其韩,吴春明.内蒙古阿拉善地区前寒武纪变质基底阿拉善群的再厘定[J].中国地质,2006(01):138-145. |
| [4] | 耿元生,周喜文.阿拉善地区新元古代岩浆事件及其地质意义[J].岩石矿物学杂志,2010(06):779-795. |
| [5] | 耿元生,王新社,沈其韩,吴春明.阿拉善地区新元古代晋宁期变形花岗岩的发现及其地质意义[J].岩石矿物学杂志,2002(04):412-420. |
| [6] | 张建军,王涛,张招崇,童英,张磊,史兴俊,郭磊,李舢,曾涛.华北地块北缘西段巴音诺尔公-狼山地区牙马图岩体的岩浆混合成因--岩相学和元素地球化学证据[J].地质论评,2012(01):53-66. |
| [7] | 赵国春.华北克拉通基底主要构造单元变质作用演化及其若干问题讨论[J].岩石学报,2009(08):1772-1792. |
| [8] | 赵国春,孙敏,Simon A.Wilde.Major tectonic units of the North China Craton and their Paleoproterozoic assembly[J].中国科学D辑(英文版),2003(01):23-38. |
| [9] | Timothy M. Kusky;Jianghai Li .Paleoproterozoic tectonic evolution of the North China Craton[J].Journal of Asian earth sciences,2003(4):383-397. |
| [10] | Mingguo Zhai;Jinghui Guo;Wenjun Liu .Neoarchean to Paleoproterozoic continental evolution and tectonic history of the North China Craton: a review[J].Journal of Asian earth sciences,2005(5):547-561. |
| [11] | Zhai M G .Cratonization and the Ancient North China Continent:A summary and review[J].Sciencein in China:Series D,2011,54(08):1110-1120. |
| [12] | 冉皞,张维杰,刘治博.内蒙古阿拉善右旗杭嘎勒晚二叠世二长花岗岩地球化学特征和LA-ICP-MS锆石U-Pb定年[J].地质通报,2012(10):1565-1575. |
| [13] | 王廷印;王士政;王金荣.阿拉善地区古生代陆壳的形成和演化[M].兰州:兰州大学出版社,1994:90-199. |
| [14] | 郑荣国,吴泰然,张文,冯继承,徐操,孟庆鹏,张昭昱.阿拉善地块北缘雅干花岗岩体地球化学、地质年代学及其对区域构造演化制约[J].岩石学报,2013(08):2665-2675. |
| [15] | 李俊建 .内蒙古阿拉善地块区域成矿系统[D].中国地质大学(北京),2006. |
| [16] | 陈志勇,杨帅师,孟二根,黄占起.内蒙古阿拉善左旗巴音诺日公地区前寒武系的厘定[J].地质通报,2004(04):345-351. |
| [17] | 丁见广,宋克金,姚志昂,丁先进,杨海成,杨东.河南省新县赛山寨铜异常区找矿前景综合评价[J].地质与勘探,2013(04):689-695. |
| [18] | 党犇,赵虹,林广春,仵康林,康晓燕,葛海影,吴斌,刘少红.内蒙古西部银根-额济纳旗盆地及邻区二叠纪火山岩的地球化学特征和构造环境[J].地质通报,2011(06):923-931. |
| [19] | 夏林圻,李向民,夏祖春,徐学义,马中平,王立社.天山石炭-二叠纪大火成岩省裂谷火山作用与地幔柱[J].西北地质,2006(01):1-49. |
| [20] | 夏林圻,夏祖春,徐学义,李向民,马中平.天山及邻区石炭纪-早二叠世裂谷火山岩岩石成因[J].西北地质,2008(04):1-68. |
| [21] | 包创,陈岳龙,李大鹏.阿拉善地块北缘朱拉扎嘎毛道晚二叠世火山岩的发现[J].地学前缘,2012(05):156-163. |
| [22] | 耿元生,周喜文.阿拉善变质基底中的早二叠世岩浆热事件--来自同位素年代学的证据[J].岩石学报,2012(09):2667-2685. |
| [23] | 聂凤军,江思宏,白大明,张义,赵月明,王新亮.内蒙古北山及邻区金属矿床类型及其时空分布[J].地质学报,2003(03):367-378. |
| [24] | 孟贵祥,吕庆田,严加永,王勇,杨岳清,赵金花.北山内蒙古地区铁矿成矿特征及其找矿前景[J].矿床地质,2009(06):815-829. |
| [25] | 郭晓东,李强之,金宝义,陈孝强,马倩.北山地区金和铜等成矿规律及找矿方向探讨[J].黄金地质,2003(02):33-37. |
| [26] | 徐庆鸿,谢文清,陈远荣.福建邱村金矿综合地球化学异常分带模型与找矿预测标志[J].地质与勘探,2005(01):56-61. |
| [27] | 王鹏,董国臣,许卫东,陈永长,聂飞,孙凡,王霞,董美玲.辽西北票二道沟金矿的矿化特点及其意义[J].地质与勘探,2013(03):429-436. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%