CN102879329A - Hydromica alteration comprehensive mapping method - Google Patents
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- 230000004075 alteration Effects 0.000 title claims abstract description 180
- 238000013507 mapping Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 16
- 229910052770 Uranium Inorganic materials 0.000 claims abstract description 23
- 239000010445 mica Substances 0.000 claims abstract description 23
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 23
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000011435 rock Substances 0.000 claims description 89
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 72
- 239000011707 mineral Substances 0.000 claims description 72
- 238000010835 comparative analysis Methods 0.000 claims description 4
- 230000003628 erosive effect Effects 0.000 claims description 4
- 239000010438 granite Substances 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 3
- 230000033558 biomineral tissue development Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 210000003484 anatomy Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000013316 zoning Methods 0.000 description 1
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Abstract
本发明涉及一种水云母蚀变综合填图方法，依次包括以下步骤：1、对待测区域按照1∶250000～1∶5000比例尺进行的测网布设；2、蚀变观察及蚀变强度初步标定；3、对测网上的每个观察点采集若干个样品，对样品进行薄片观察，进行蚀变强度精确标定；4、当初步判断与精确判断一致时，最终判断结论与初步判断、精确判断一致；当初步判断不是强水云母蚀变、精确判断与初步判断结论不一致时，最终判断结论与精确判断保持一致；当初步判断为强水云母蚀变时，最终判断为强水云母蚀变；5、根据最终判断，对待测区域进行水云母蚀变综合填图。本发明实现了水云母蚀变完整填图，可操作性强，且对热液型铀矿找矿有很强参考意义。The invention relates to a method for comprehensive mapping of hydromica alteration, which comprises the following steps in sequence: 1. Measuring net layout for the area to be measured according to the scale of 1:250000-1:5000; 2. Alteration observation and preliminary calibration of alteration intensity ;3. Collect several samples for each observation point on the measuring network, observe the samples in thin slices, and carry out accurate calibration of the alteration intensity; 4. When the preliminary judgment is consistent with the precise judgment, the final judgment conclusion is consistent with the preliminary judgment and the precise judgment ; When the preliminary judgment is not strong water mica alteration, and the precise judgment is inconsistent with the preliminary judgment conclusion, the final judgment conclusion is consistent with the precise judgment; when the preliminary judgment is strong water mica alteration, the final judgment is strong water mica alteration; 5 , According to the final judgment, carry out comprehensive mapping of hydromica alteration in the area to be measured. The invention realizes complete mapping of hydromica alteration, has strong operability, and has strong reference significance for prospecting hydrothermal uranium deposits.
Description
技术领域 technical field
本发明涉及一种水云母蚀变综合填图方法，特别是涉及一种实现了完整填图，可操作性强，且对热液型铀矿找矿有很强参考意义的水云母蚀变综合填图方法。The invention relates to a hydromica alteration comprehensive mapping method, in particular to a hydromica alteration comprehensive mapping method that realizes complete mapping, has strong operability, and has strong reference significance for hydrothermal uranium ore prospecting Mapping method.
背景技术 Background technique
蚀变对热液型铀成矿控制作用的重要性前人已有着充分的认识，并以蚀变类型的组合形式划分了碱交代、酸交代等铀矿化类型。蚀变类型研究成为热液型铀矿矿床解剖必需涉及的内容。前人有关典型热液型铀矿床研究成果，无不例外的均有此部分内容，且根据蚀变与铀矿化的先后关系和组合形式，将铀矿化划分为多个成矿系列，如水云母-赤铁矿化-碳酸岩化铀成矿系列等，并建立了蚀变期次划分、蚀变分带标志，以这些标志为依据，预测了多片成功的远景靶区，取得了巨大的经济效益。因此，蚀变特征研究不管是过去、现在还是将来都是热液型铀矿综合分析的重点内容。但直到现在，还没有见到完整的蚀变综合填图方法，而蚀变对预测深部盲矿又具有不可替代的作用。The importance of alteration to the control of hydrothermal uranium mineralization has been well understood before, and uranium mineralization types such as alkali metasomatism and acid metasomatism are divided in the form of combination of alteration types. The study of alteration types has become a necessary content in the anatomy of hydrothermal uranium deposits. The predecessors' research results on typical hydrothermal uranium deposits all have this part without exception, and according to the sequence relationship and combination form of alteration and uranium mineralization, uranium mineralization is divided into multiple metallogenic series, such as hydromica -hematite-carbonatized uranium ore-forming series, etc., and established alteration phase divisions and alteration zoning signs. Based on these signs, many successful prospective target areas have been predicted, and huge achievements have been made. economic benefits. Therefore, the study of alteration characteristics is the key content of the comprehensive analysis of hydrothermal uranium deposits no matter in the past, present or future. But until now, no complete comprehensive alteration mapping method has been seen, and alteration plays an irreplaceable role in predicting deep blind mines.
水云母蚀变是一种面式蚀变，在岩石上表现为嫩绿色，在野外易于识别，在我国南方众多热液型铀矿床发育区，该蚀变在地表均有显示，野外地质蚀变填图的可操作性强，且见效快，对寻找深部盲矿具有事半功倍的作用。因此亟需提供一种水云母蚀变综合填图方法，以对热液型铀矿找矿提供参考。Hydromica alteration is a kind of surface alteration, which appears light green on rocks and is easy to identify in the field. In many areas where hydrothermal uranium deposits develop in southern my country, this alteration is displayed on the surface. Field geological alteration Mapping has strong operability and quick results, and it has a multiplier effect on searching for deep blind mines. Therefore, it is urgent to provide a comprehensive mapping method for hydromicite alteration to provide a reference for prospecting hydrothermal uranium deposits.
发明内容 Contents of the invention
本发明要解决的技术问题是提供一种实现了完整填图，可操作性强，且对热液型铀矿找矿有很强参考意义的水云母蚀变综合填图方法。The technical problem to be solved by the present invention is to provide a hydromica alteration comprehensive mapping method that realizes complete mapping, has strong operability, and has strong reference significance for hydrothermal uranium ore prospecting.
为解决上述技术问题，本发明一种水云母蚀变综合填图方法，依次包括以下步骤：In order to solve the above-mentioned technical problems, a kind of hydromica alteration comprehensive mapping method of the present invention, comprises the following steps successively:
(1)测网布设(1) Measuring network layout
根据对待测区域蚀变填图精度的要求，对待测区域按照1∶250000～1∶5000比例尺进行的测网布设，1∶250000代表网间距为2.5km的测网，1∶5000代表网间距为50m的测网；测网中测线彼此交汇点为观察点；待测区域为火山岩和/或花岗岩分布区；According to the requirements for the accuracy of alteration mapping in the area to be measured, the grid layout is carried out according to the scale of 1:250000~1:5000 in the area to be measured. 50m measuring network; the intersection point of the measuring lines in the measuring network is the observation point; the area to be measured is the distribution area of volcanic rock and/or granite;
(2)蚀变观察及蚀变强度初步标定(2) Alteration observation and preliminary calibration of alteration intensity
沿着测网上的观察点，对待测区域的岩石进行观测，采集待测区域岩石的颜色、岩石结构和蚀变类型；Observe the rocks in the area to be measured along the observation points on the measuring network, and collect the color, rock structure and alteration type of the rocks in the area to be measured;
当待测区域岩石的颜色通体表现为绿色、岩石结构中造岩矿物和充填物均出现粒状水云母化蚀变矿物，初步判断为强水云母蚀变；When the color of the rock in the area to be tested is green, and the rock-forming minerals and fillings in the rock structure have granular hydromica alteration minerals, it is preliminarily judged as strong hydromica alteration;
当待测区域岩石的颜色通体表现为原岩本色、岩石结构中造岩矿物出现粒状水云母化蚀变矿物，充填物中出现面状水云母化蚀变矿物，初步判断为中等水云母蚀变；When the color of the rock in the area to be tested is the original rock color, the rock-forming minerals in the rock structure appear granular hydromica alteration minerals, and the fillings appear planar hydromica alteration minerals, it is preliminarily judged as moderate hydromica alteration ;
当待测区域岩石的颜色通体表现为原岩本色、岩石结构中造岩矿物出现水云母化蚀变矿物，充填物中未出现面状水云母化蚀变矿物，初步判断为弱等水云母蚀变；When the color of the rocks in the area to be tested is the original rock color, the rock-forming minerals in the rock structure appear hydromica alteration minerals, and there is no planar hydromica alteration minerals in the filling, it is preliminarily judged to be weak isohydromica erosion. Change;
当待测区域岩石的颜色通体表现为原岩本色、岩石结构中造岩矿物和充填物均未出现水云母化蚀变矿物，初步判断为正常岩石；When the color of the rock in the area to be tested shows the natural color of the original rock, and the rock-forming minerals and fillings in the rock structure do not appear hydromicitized alteration minerals, it is preliminarily judged to be a normal rock;
(3)采集样品及精确标定(3) Collection of samples and accurate calibration
对测网上的每个观察点采集若干个样品；Collect several samples for each observation point on the test network;
对采集到的样品进行薄片观察，进行蚀变强度精确标定；Thin-section observation of the collected samples is carried out to accurately calibrate the alteration intensity;
当样品的岩石结构中造岩矿物的大于50％体积百分比被蚀变矿物替换、蚀变类型为水云母蚀变时，精确判断为强水云母蚀变；When more than 50% of the rock-forming minerals in the rock structure of the sample are replaced by altered minerals, and the alteration type is hydromica alteration, it is accurately judged as strong hydromica alteration;
当样品的岩石结构中造岩矿物20％～50％的体积百分比被蚀变矿物替换、蚀变类型为水云母蚀变时，精确判断为中等水云母蚀变；When 20% to 50% of the volume percentage of rock-forming minerals in the rock structure of the sample is replaced by altered minerals, and the alteration type is hydromica alteration, it is accurately judged as moderate hydromica alteration;
当样品的岩石结构中造岩矿物大于等于5％、小于20％的体积百分比被蚀变矿物替换、蚀变类型为水云母蚀变时，精确判断为弱等水云母蚀变；When the volume percentage of rock-forming minerals in the rock structure of the sample is greater than or equal to 5%, and less than 20% is replaced by altered minerals, and the alteration type is hydromica alteration, it is accurately judged as weak isohydromica alteration;
当样品的岩石结构中造岩矿物的小于5％体积百分比被蚀变矿物替换，精确判断为正常岩石；When less than 5% volume percentage of rock-forming minerals in the rock structure of the sample is replaced by altered minerals, it is accurately judged as normal rock;
(4)蚀变强度对比分析和最终定级(4) Comparative analysis and final grading of alteration intensity
当初步判断与精确判断结论一致时，最终判断结论与初步判断、精确判断一致；When the preliminary judgment is consistent with the precise judgment conclusion, the final judgment conclusion is consistent with the preliminary judgment and the precise judgment;
当初步判断的结论不是强水云母蚀变、精确判断与初步判断结论不一致时，最终判断结论与精确判断保持一致；When the conclusion of the preliminary judgment is not the alteration of strong water mica, and the precise judgment is inconsistent with the preliminary judgment, the final judgment is consistent with the precise judgment;
当初步判断结论为强水云母蚀变时，最终判断结论为强水云母蚀变；When the preliminary judgment conclusion is strong water mica alteration, the final judgment conclusion is strong water mica alteration;
(5)根据最终判断，对待测区域进行水云母蚀变综合填图。(5) According to the final judgment, carry out comprehensive mapping of hydromica alteration in the area to be measured.
对矿田或矿床进行预测时，选用1∶250000～1∶100000比例尺，对矿体进行预测时，选用1∶100000～1∶5000。When predicting ore fields or deposits, use a scale of 1:250,000 to 1:100,000, and when predicting ore bodies, use a scale of 1:100,000 to 1:5000.
对测网上的每个观察点采集3个样品，单个样品的尺寸为5×5×5cm。Collect 3 samples for each observation point on the measuring net, and the size of a single sample is 5×5×5cm.
采用GIS软件，对最终判断结论进行蚀变编号，将强水云母蚀变点设为数字4，中等水云母蚀变设为数字3，弱水云母蚀变设为数字2，正常岩石设为数字1，将观察点以经纬度坐标或大地坐标投影到GIS软件上，以蚀变编号为变量，绘制等值线图，最终完成水云母蚀变填图；利用水云母蚀变综合填图进行热液型铀矿找矿。Using GIS software, the final judgment conclusion is numbered by alteration, the strong water mica alteration point is set as number 4, the medium water mica alteration is set as number 3, the weak water mica alteration is set as number 2, and the normal rock is set as number 1. Project the observation point on the GIS software with latitude and longitude coordinates or geodetic coordinates, draw the contour map with the alteration number as the variable, and finally complete the hydromica alteration mapping; use the hydromica alteration comprehensive mapping to carry out hydrothermal Type uranium ore prospecting.
本发明实现了完整水云母蚀变填图，可操作性强，且对热液型铀矿找矿有很强指导意义，具有可观的经济效益。The invention realizes complete hydromica alteration mapping, has strong operability, has strong guiding significance for prospecting hydrothermal uranium deposits, and has considerable economic benefits.
利用本方法已对浙江省衢州地区、新疆白杨河地区及江西会昌地区进行水云母蚀变综合填图，利用获得的水云母蚀变综合填图进行热液型铀矿找矿。发现已知矿床均位于强水云母蚀变地区，指示强水云母蚀变地区是本区铀矿找矿重要标志之一。水云母蚀变综合填图中未见矿床、矿点分布的强水云母蚀变地区则是铀矿找矿新区突破的重点区域，只分布有矿点的强水云母蚀变地区，通过进一步工作可将矿点发展为矿床。Using this method, hydromica alteration comprehensive mapping has been carried out in Quzhou area of Zhejiang Province, Baiyanghe area of Xinjiang and Huichang area of Jiangxi Province, and hydrothermal uranium ore prospecting is carried out by using the obtained hydromica alteration comprehensive mapping. It is found that the known deposits are all located in the strong hydromica alteration area, indicating that the strong hydromica alteration area is one of the important signs of uranium prospecting in this area. In the hydromica alteration comprehensive mapping, there are no ore deposits and strong hydromica alteration areas with distribution of ore points are the key areas for breakthroughs in new uranium prospecting areas. Only strong hydromica alteration areas with ore points are distributed. Through further work Mines can be developed into deposits.
具体实施方式 Detailed ways
实施例一Embodiment one
(1)测网布设(1) Measuring network layout
根据对待测区域蚀变填图精度的要求，对待测区域按照1∶250000～1∶5000比例尺进行的测网布设，1∶250000代表网间距为2.5km的测网，1∶5000代表网间距为50m的测网；对矿田或矿床进行预测时，选用1∶250000～1∶100000比例尺，对矿体进行预测时，选用1∶100000～1∶5000；测网中测线彼此交汇点为观察点；待测区域为火山岩和/或花岗岩分布区；According to the requirements for the accuracy of alteration mapping in the area to be measured, the grid layout is carried out according to the scale of 1:250000~1:5000 in the area to be measured. 50m measuring network; when predicting ore fields or deposits, use a scale of 1:250,000 to 1:100,000; when predicting ore bodies, use a scale of 1:100,000 to 1:5000; the intersection point of the measuring lines in the measuring network is the observation point; the area to be measured is a volcanic rock and/or granite distribution area;
(2)蚀变观察及蚀变强度初步标定(2) Alteration observation and preliminary calibration of alteration intensity
沿着测网上的观察点，对待测区域的岩石进行观测，采集待测区域岩石的颜色、岩石结构和蚀变类型；Observe the rocks in the area to be measured along the observation points on the measuring network, and collect the color, rock structure and alteration type of the rocks in the area to be measured;
当待测区域岩石的颜色通体表现为绿色、岩石结构中造岩矿物和充填物均出现粒状水云母化蚀变矿物，初步判断为强水云母蚀变；When the color of the rock in the area to be tested is green, and the rock-forming minerals and fillings in the rock structure have granular hydromica alteration minerals, it is preliminarily judged as strong hydromica alteration;
当待测区域岩石的颜色通体表现为原岩本色、岩石结构中造岩矿物出现粒状水云母化蚀变矿物，充填物中出现面状水云母化蚀变矿物，初步判断为中等水云母蚀变；When the color of the rock in the area to be tested is the original rock color, the rock-forming minerals in the rock structure appear granular hydromica alteration minerals, and the fillings appear planar hydromica alteration minerals, it is preliminarily judged as moderate hydromica alteration ;
当待测区域岩石的颜色通体表现为原岩本色、岩石结构中造岩矿物出现水云母化蚀变矿物，充填物中未出现面状水云母化蚀变矿物，初步判断为弱等水云母蚀变；When the color of the rocks in the area to be tested is the original rock color, the rock-forming minerals in the rock structure appear hydromica alteration minerals, and there is no planar hydromica alteration minerals in the filling, it is preliminarily judged to be weak isohydromica erosion. Change;
当待测区域岩石的颜色通体表现为原岩本色、岩石结构中造岩矿物和充填物均未出现水云母化蚀变矿物，初步判断为正常岩石；When the color of the rock in the area to be tested shows the natural color of the original rock, and the rock-forming minerals and fillings in the rock structure do not appear hydromicitized alteration minerals, it is preliminarily judged to be a normal rock;
(3)采集样品及精确标定(3) Collection of samples and accurate calibration
对测网上的每个观察点采集若干个样品，单个样品为5×5×5cm；Collect several samples for each observation point on the test network, and a single sample is 5×5×5cm;
对采集到的样品进行薄片观察，进行蚀变强度精确标定；Thin-section observation of the collected samples is carried out to accurately calibrate the alteration intensity;
当样品的岩石结构中造岩矿物的大于50％体积百分比被蚀变矿物替换、蚀变类型为水云母蚀变时，精确判断为强水云母蚀变；When more than 50% of the rock-forming minerals in the rock structure of the sample are replaced by altered minerals, and the alteration type is hydromica alteration, it is accurately judged as strong hydromica alteration;
当样品的岩石结构中造岩矿物20％～50％的体积百分比被蚀变矿物替换、蚀变类型为水云母蚀变时，精确判断为中等水云母蚀变；When 20% to 50% of the volume percentage of rock-forming minerals in the rock structure of the sample is replaced by altered minerals, and the alteration type is hydromica alteration, it is accurately judged as moderate hydromica alteration;
当样品的岩石结构中造岩矿物大于等于5％、小于20％的体积百分比被蚀变矿物替换、蚀变类型为水云母蚀变时，精确判断为弱等水云母蚀变；When the volume percentage of rock-forming minerals in the rock structure of the sample is greater than or equal to 5%, and less than 20% is replaced by altered minerals, and the alteration type is hydromica alteration, it is accurately judged as weak isohydromica alteration;
当样品的岩石结构中造岩矿物的小于5％体积百分比被蚀变矿物替换，精确判断为正常岩石；When less than 5% volume percentage of rock-forming minerals in the rock structure of the sample is replaced by altered minerals, it is accurately judged as normal rock;
(4)蚀变强度对比分析和最终定级(4) Comparative analysis and final grading of alteration intensity
当初步判断与精确判断结论一致时，最终判断结论与初步判断、精确判断一致；When the preliminary judgment is consistent with the precise judgment conclusion, the final judgment conclusion is consistent with the preliminary judgment and the precise judgment;
当初步判断的结论不是强水云母蚀变、精确判断与初步判断结论不一致时，最终判断结论与精确判断保持一致；When the conclusion of the preliminary judgment is not the alteration of strong water mica, and the precise judgment is inconsistent with the preliminary judgment, the final judgment is consistent with the precise judgment;
当初步判断结论为强水云母蚀变时，最终判断结论为强水云母蚀变；When the preliminary judgment conclusion is strong water mica alteration, the final judgment conclusion is strong water mica alteration;
(5)根据最终判断，对待测区域进行水云母蚀变综合填图。优选采用GIS软件，对最终判断结论进行蚀变编号，将强水云母蚀变点设为数字4，中等水云母蚀变设为数字3，弱水云母蚀变设为数字2，正常岩石设为数字1，将观察点以经纬度坐标或大地坐标投影到GIS软件上，以蚀变编号为变量，绘制等值线图，最终完成水云母蚀变填图。(5) According to the final judgment, carry out comprehensive mapping of hydromica alteration in the area to be measured. It is preferable to use GIS software to carry out alteration numbering for the final judgment conclusion. Set the alteration point of strong hydromica as number 4, the alteration point of medium hydromica as number 3, the alteration of weak hydromica as number 2, and the point of normal rock as Number 1, project the observation point on the GIS software with latitude and longitude coordinates or geodetic coordinates, use the alteration number as a variable, draw a contour map, and finally complete the hydromica alteration map.
利用水云母蚀变综合填图进行热液型铀矿找矿。Prospecting for hydrothermal uranium deposits using hydromica alteration comprehensive mapping.
实施例二Embodiment two
(1)测网布设(1) Measuring network layout
待测区域为浙江省衢州地区，待测区域的范围为：东经118°30′00″～119°30′00″，北纬28°40′00″～29°20′00″，面积约为7100平方公里；选用1∶100000比例尺进行的测网布设，代表网间距为1km的测网；测网中测线彼此交汇点为观察点；The area to be tested is Quzhou, Zhejiang Province. The range of the area to be tested is: 118°30′00″～119°30′00″ east longitude, 28°40′00″～29°20′00″ north latitude, with an area of about 7100 square meters square kilometers; the survey network layout is carried out with a scale of 1:100000, representing a survey network with a grid spacing of 1km; the intersection point of the survey lines in the survey network is the observation point;
(2)蚀变观察及蚀变强度初步标定(2) Alteration observation and preliminary calibration of alteration intensity
沿着测网上的观察点，对待测区域的岩石进行观测，采集待测区域岩石的颜色、岩石结构和蚀变类型；Observe the rocks in the area to be measured along the observation points on the measuring network, and collect the color, rock structure and alteration type of the rocks in the area to be measured;
当待测区域岩石的颜色通体表现为绿色、岩石结构中造岩矿物和充填物均出现粒状水云母化蚀变矿物，初步判断为强水云母蚀变；When the color of the rock in the area to be tested is green, and the rock-forming minerals and fillings in the rock structure have granular hydromica alteration minerals, it is preliminarily judged as strong hydromica alteration;
当待测区域岩石的颜色通体表现为原岩本色、岩石结构中造岩矿物出现粒状水云母化蚀变矿物，充填物中出现面状水云母化蚀变矿物，初步判断为中等水云母蚀变；When the color of the rock in the area to be tested is the original rock color, the rock-forming minerals in the rock structure appear granular hydromica alteration minerals, and the fillings appear planar hydromica alteration minerals, it is preliminarily judged as moderate hydromica alteration ;
当待测区域岩石的颜色通体表现为原岩本色、岩石结构中造岩矿物出现水云母化蚀变矿物，充填物中未出现面状水云母化蚀变矿物，初步判断为弱等水云母蚀变；When the color of the rocks in the area to be tested is the original rock color, the rock-forming minerals in the rock structure appear hydromica alteration minerals, and there is no planar hydromica alteration minerals in the filling, it is preliminarily judged to be weak isohydromica erosion. Change;
当待测区域岩石的颜色通体表现为原岩本色、岩石结构中造岩矿物和充填物均未出现水云母化蚀变矿物，初步判断为正常岩石；When the color of the rock in the area to be tested shows the natural color of the original rock, and the rock-forming minerals and fillings in the rock structure do not appear hydromicitized alteration minerals, it is preliminarily judged to be a normal rock;
(3)采集样品及精确标定(3) Collection of samples and accurate calibration
对测网上的每个观察点采集3个样品，单个样品为5×5×5cm；Collect 3 samples for each observation point on the measuring net, and a single sample is 5×5×5cm;
对采集到的样品进行薄片观察，进行蚀变强度精确标定，Thin-section observation of the collected samples is carried out to accurately calibrate the alteration intensity,
当样品的岩石结构中造岩矿物的大于50％体积百分比被蚀变矿物替换、蚀变类型为水云母蚀变时，精确判断为强水云母蚀变；When more than 50% of the rock-forming minerals in the rock structure of the sample are replaced by altered minerals, and the alteration type is hydromica alteration, it is accurately judged as strong hydromica alteration;
当样品的岩石结构中造岩矿物20％～50％的体积百分比被蚀变矿物替换、蚀变类型为水云母蚀变时，精确判断为中等水云母蚀变；When 20% to 50% of the volume percentage of rock-forming minerals in the rock structure of the sample is replaced by altered minerals, and the alteration type is hydromica alteration, it is accurately judged as moderate hydromica alteration;
当样品的岩石结构中造岩矿物大于等于5％、小于20％的体积百分比被蚀变矿物替换、蚀变类型为水云母蚀变时，精确判断为弱等水云母蚀变；When the volume percentage of rock-forming minerals in the rock structure of the sample is greater than or equal to 5%, and less than 20% is replaced by altered minerals, and the alteration type is hydromica alteration, it is accurately judged as weak isohydromica alteration;
当样品的岩石结构中造岩矿物的小于5％体积百分比被蚀变矿物替换，精确判断为正常岩石；When less than 5% volume percentage of rock-forming minerals in the rock structure of the sample is replaced by altered minerals, it is accurately judged as normal rock;
(4)蚀变强度对比分析和最终定级(4) Comparative analysis and final grading of alteration intensity
当初步判断与精确判断结论一致时，最终判断结论与初步判断、精确判断一致；When the preliminary judgment is consistent with the precise judgment conclusion, the final judgment conclusion is consistent with the preliminary judgment and the precise judgment;
当初步判断的结论不是强水云母蚀变、精确判断与初步判断结论不一致时，最终判断结论与精确判断保持一致；When the conclusion of the preliminary judgment is not the alteration of strong water mica, and the precise judgment is inconsistent with the preliminary judgment, the final judgment is consistent with the precise judgment;
当初步判断结论为强水云母蚀变时，最终判断结论为强水云母蚀变；When the preliminary judgment conclusion is strong water mica alteration, the final judgment conclusion is strong water mica alteration;
(6)成果图件编制(6) Compilation of results maps
根据最终判断，对待测区域进行水云母蚀变综合填图；According to the final judgment, comprehensive mapping of hydromica alteration is carried out in the area to be measured;
采用GIS软件，对最终判断结论进行蚀变编号，将强水云母蚀变点设为数字4，中等水云母蚀变设为数字3，弱水云母蚀变设为数字2，正常岩石设为数字1，将观察点以经纬度坐标或大地坐标投影到某一GIS软件上，以蚀变编号为变量，绘制等值线图，依据ARCGIS9.1软件中的Arcmap-Atcinfor-geostatistical Analyst模块，采用inverse distance weighting插值方式，完成水云母蚀变综合填图。Using GIS software, the final judgment conclusion is numbered by alteration, the strong water mica alteration point is set as number 4, the medium water mica alteration is set as number 3, the weak water mica alteration is set as number 2, and the normal rock is set as number 1. Project the observation point onto a certain GIS software with latitude and longitude coordinates or geodetic coordinates, and use the alteration number as a variable to draw a contour map. According to the Arcmap-Atcinfor-geostatistical Analyst module in the ARCGIS9.1 software, use inverse distance The weighting interpolation method is used to complete the comprehensive mapping of hydromica alteration.
利用水云母蚀变综合填图进行热液型铀矿找矿。发现已知矿床均位于强水云母蚀变地区，指示水云母蚀变高场区是本区铀矿找矿重要标志之一。水云母蚀变综合填图中未见矿床、矿点分布的强水云母蚀变地区则是铀矿找矿新区突破的重点区域，只分布有矿点的强水云母蚀变地区，通过进一步工作可将矿点发展为矿床。Prospecting for hydrothermal uranium deposits using hydromica alteration comprehensive mapping. It is found that the known deposits are all located in areas of strong hydromica alteration, indicating that the high-field area of hydromica alteration is one of the important signs of uranium prospecting in this area. In the hydromica alteration comprehensive mapping, there are no ore deposits and strong hydromica alteration areas with distribution of ore points are the key areas for breakthroughs in new uranium prospecting areas. Only strong hydromica alteration areas with ore points are distributed. Through further work Mines can be developed into deposits.
实施例三Embodiment Three
与实施例二不同之处仅在于待测区域为江西会昌，江西会昌为花岗岩发育区，总面积约为1万平方公里；选用1∶250000比例尺进行的测网布设。The only difference from Example 2 is that the area to be measured is Huichang, Jiangxi, which is a granite development area with a total area of about 10,000 square kilometers; the measuring network is laid out at a scale of 1:250,000.
实施例四Embodiment Four
与实施例二不同之处仅在于待测区域为新疆白杨河地区，新疆白杨河地区为火山岩发育区，总面积约为5000平方公里；选用1∶5000比例尺进行的测网布设。The only difference from Example 2 is that the area to be measured is the Baiyanghe region of Xinjiang, which is a volcanic rock development area with a total area of about 5000 square kilometers; the measuring network is laid out at a scale of 1:5000.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107346038A (en) * | 2017-06-08 | 2017-11-14 | 昆明理工大学 | The method of " four step formulas " large scale coordinate detection deep hydrothermal deposit or ore body |
| CN109001422A (en) * | 2018-06-20 | 2018-12-14 | 华北水利水电大学 | A kind of geochemical discrimination method of granite choritization alteration extent |
| CN110059434A (en) * | 2019-04-26 | 2019-07-26 | 中国地质大学（武汉） | The Visual Expression Method and system of a kind of uranium ore alteration type and intensity |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107346038A (en) * | 2017-06-08 | 2017-11-14 | 昆明理工大学 | The method of " four step formulas " large scale coordinate detection deep hydrothermal deposit or ore body |
| CN107346038B (en) * | 2017-06-08 | 2019-02-19 | 昆明理工大学 | The method of " four step formulas " large scale coordinate detection deep hydrothermal deposit or ore body |
| CN109001422A (en) * | 2018-06-20 | 2018-12-14 | 华北水利水电大学 | A kind of geochemical discrimination method of granite choritization alteration extent |
| CN109001422B (en) * | 2018-06-20 | 2019-10-01 | 华北水利水电大学 | A kind of geochemical discrimination method of granite choritization alteration extent |
| CN110059434A (en) * | 2019-04-26 | 2019-07-26 | 中国地质大学（武汉） | The Visual Expression Method and system of a kind of uranium ore alteration type and intensity |
| CN110059434B (en) * | 2019-04-26 | 2020-10-30 | 中国地质大学（武汉） | Visualized expression method and system for uranium ore alteration types and intensities |
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