东昆仑沙丘低缓磁异常区深部铁多金属矿床找矿标志
|
摘要
那陵郭勒河沙丘地区位于东昆仑祁漫塔格早古生代裂陷槽,经历了早古生代及晚古生代—早中生代的复合造山作用,发育多期次岩浆活动和成矿作用,具有较好的铁多金属找矿前景。文章通过研究沙丘铁多金属矿的成矿地质背景、矿床特征、地磁异常和地球化学异常等,探讨了其找矿标志。研究表明:沙丘地区铁多金属矿床成因类型属接触交代型(矽卡岩型),矽卡岩与磁铁矿体在空间分布紧密共生,是重要的找矿标志;引起该区磁异常的主要地质体为闪锌磁铁矿矿石、闪锌磁铁矿化矽卡岩、矽卡岩、闪长岩、硅质岩、玄武岩、钾长花岗斑岩;利用物探磁异常找寻磁铁矿作用显著,在低缓磁异常区、正负异常接触部位是找寻铁多金属矿最重要也是最直接的找矿标志。
The mausoleum of goldune area located in East Kunlun Qimantage Early Paleozoic aulacogen, experienced compound orogeny in Early Paleozoic and late Paleozoic to early Mesozoic, with the development of multi period magmatic activity and mineralization, and great iron polymetallic ore prospects.In this paper, the ore-prospecting signs of dune-iron polymetallic ore deposits are discussed by studying the metallogenic geological background, characteristics of deposits, geomagnetic anomalies and geochemical anomalies. The research shows that the genetic type of the iron polymetallideposit in the dune area belongs is contact metamorphism( skarn type).The skarn and the magnetite body are closely symbiotic in the spatial distribution, which isan important prospecting indiator.The main geologic bodies causing magnetic anomalies in this area are flash zinc magnetite ore, flash zinc magnetite mineralized skarn,skarn, diorite, siliceous rock, basalt, and potassium long granite porphyry. The use of geophysical magnetic anomalies to find magnetite is very significant, which is the most important and direct prospecting signs for the search for iron-polymetallic deposits, in the low-temperage magnetic anomaly zone and the positive and negative anomaly contact sites.
The mausoleum of goldune area located in East Kunlun Qimantage Early Paleozoic aulacogen, experienced compound orogeny in Early Paleozoic and late Paleozoic to early Mesozoic, with the development of multi period magmatic activity and mineralization, and great iron polymetallic ore prospects.In this paper, the ore-prospecting signs of dune-iron polymetallic ore deposits are discussed by studying the metallogenic geological background, characteristics of deposits, geomagnetic anomalies and geochemical anomalies. The research shows that the genetic type of the iron polymetallideposit in the dune area belongs is contact metamorphism( skarn type).The skarn and the magnetite body are closely symbiotic in the spatial distribution, which isan important prospecting indiator.The main geologic bodies causing magnetic anomalies in this area are flash zinc magnetite ore, flash zinc magnetite mineralized skarn,skarn, diorite, siliceous rock, basalt, and potassium long granite porphyry. The use of geophysical magnetic anomalies to find magnetite is very significant, which is the most important and direct prospecting signs for the search for iron-polymetallic deposits, in the low-temperage magnetic anomaly zone and the positive and negative anomaly contact sites.
引文
李洪普,曹永亮,关有国.2009.青海东昆仑山四角羊地区铁多金属矿床的成矿地质特征[J].地质通报,28(6):787-793.
马生龙,张培青,范长安.2011.那陵郭勒河沙丘地区2011年工作方案[R].青海省第三地质矿产勘查院.
潘彤.2005.东昆仑成矿带钴矿成矿系列研究[D].长春:吉林大学.
青海省第三地质矿产勘查院.2012.青海省格尔木市那陵郭勒河沙丘地区铁多金属矿普查报告[R].
张爱奎,莫宣学,李云平,等.2010.青海西部祁漫塔格成矿带找矿新进展及其意义[J].地质通报,29(7):14-26.
张爱奎.2005.野马泉成矿带有色金属找矿前景分析[D].北京:中国地质大学(北京).
张德全,党兴彦,李大新,等.2005.柴北缘地区的两类块状硫化物矿床-Ⅱ.青龙滩式VHMS型Cu-S矿床[J].矿床地质,24(6):575-583.
张德全,王富春,李大新,等.2005.柴北缘地区的两类块状硫化物矿床-Ⅰ.锡铁山式SEDEX型铅锌矿床[J].矿床地质,24(5):471-480.
张德全.2004.东昆仑综合找矿与预测[R].国家科技成果.
张雪亭,付青元,王秉璋,等.2005.青海大地构造基本格架[J].青藏高原东北部地质研究,1-10.
张雪亭,杨生德,杨站君,等.2007.青海省板块构造研究-1:100万青海省大地构造图说明书[M].北京地质出版社.
马生龙,张培青,范长安.2011.那陵郭勒河沙丘地区2011年工作方案[R].青海省第三地质矿产勘查院.
潘彤.2005.东昆仑成矿带钴矿成矿系列研究[D].长春:吉林大学.
青海省第三地质矿产勘查院.2012.青海省格尔木市那陵郭勒河沙丘地区铁多金属矿普查报告[R].
张爱奎,莫宣学,李云平,等.2010.青海西部祁漫塔格成矿带找矿新进展及其意义[J].地质通报,29(7):14-26.
张爱奎.2005.野马泉成矿带有色金属找矿前景分析[D].北京:中国地质大学(北京).
张德全,党兴彦,李大新,等.2005.柴北缘地区的两类块状硫化物矿床-Ⅱ.青龙滩式VHMS型Cu-S矿床[J].矿床地质,24(6):575-583.
张德全,王富春,李大新,等.2005.柴北缘地区的两类块状硫化物矿床-Ⅰ.锡铁山式SEDEX型铅锌矿床[J].矿床地质,24(5):471-480.
张德全.2004.东昆仑综合找矿与预测[R].国家科技成果.
张雪亭,付青元,王秉璋,等.2005.青海大地构造基本格架[J].青藏高原东北部地质研究,1-10.
张雪亭,杨生德,杨站君,等.2007.青海省板块构造研究-1:100万青海省大地构造图说明书[M].北京地质出版社.