| 李洪普.青海东昆仑那陵郭勒河东铁矿床磁异常特征分析[J].地质与勘探,2009,45(3):304-311 |
| 青海东昆仑那陵郭勒河东铁矿床磁异常特征分析 |
| Analysis of Magnetic Anomaly Characteristics in East Nalingguole River Iron Deposit in EastKunlun Mountain,Qinghai Province |
| 投稿时间：2008-09-23 修订日期：2009-04-04 |
| DOI： |
| 中文关键词: 东昆仑 那陵郭勒河东 铁矿 磁异常 |
| 英文关键词: the mountain of east Kunlun,east Nalingguole River, iron ore, magnetic anomalies |
| 基金项目:青藏高原地质矿产调查与评价专项地勘项目(项目编号:1212010818069)资助。 |
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| 中文摘要: |
| [摘要]为了研究那陵郭勒河东铁矿区磁异常源,对该区矿石进行了光谱半定量分析、多项化学
分析、组合分析和铁矿物物相分析,对成矿起重要作用的早石炭世灰岩及大理岩、印支期二长花岗岩及
黑云母钾长花岗岩、矽卡岩及含矿矽卡岩矿体的磁物性进行了对比分析,对磁异常进行了分析研究,并
对矿区磁异常进行了二维反演。结果认为:1、矿石中Fe2 O3 含量高,大于20%,TFe 含量高达35郾86% 以
上,其中MFe 28郾17% ~50郾79%,平均35郾37%,铁矿石多为原生矿石;2、磁铁矿石磁性强,远高于其它地
层、岩体,因此,矿区矿体是引起磁异常的主要因素;3、矿区磁异常的形态、范围及磁异常梯度带与产于
矽卡岩内矿体的分布极吻合,本次测制的剖面吟T 曲线及其二维反演结果也显示,矿区磁异常是由含矿
矽卡岩引起的;4、矿区磁异常与磁铁矿体吻合性较好,具有开展磁法工作的良好地球物理前提,下一步
深部找矿及外围找矿应安排在磁异常范围内进行。 |
| 英文摘要: |
| Abstract:In order to study the source of anomaly in iron ore deposit in East Na Ling Guo Le River of East Kunlun Mountains, ore in the area are car鄄
ried on such measurement as semi鄄quantitative spectral analysis, chemical analysis, combinatorial analysis and phase analysis. Contrastive analysis was
conducted among the magnetism of early Carboniferous limestone and marble, Indo鄄Chinese epoch monzogranite and biotite granite, skarn and skarn ore,
which are of importance in ore forming. Magnetic anomaly was analyzed and a two鄄dimensional inversion was conducted. It was concluded that: 1. FeO3 in
ore is more than 20%,TFe morethan 35. 86%. the content of MFe is between 28. 17% and 50. 79% with a average of 35郾37%. The Iron ore belongs to
primary ore. 2. Magnetic of the magnetite ore is much more stronger than strata and intrusives and the ore body is the main cause of magmatic anomaly. 3.
the shape,range and gradient belt of magnetic anomaly is fit close to the ore body in skarn. The result of 吟T curve and 2鄄Dimentional inversion also
showed that the magnetic anomaly was caused by ore bearing skarn. 4. The magnetic anomaly fit well to the magnetite ore. There is great precondition in
carring on magnetic measurement. Exploration in deep area and outside should be arranged in magnetic anomaly. |
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