综合物化探方法在朱拉扎嘎金矿的应用

朱拉扎嘎金矿,经综合物化探普查,在大面积覆盖区发现0.5 km2高视极化率、中低视电阻率激电异常和低缓磁异常.已施工的8个钻孔均见矿,估算黄金储量大于30 t.沿走向,激电异常在北东、南西两端有大幅度向外延伸趋势,可能是深部硫化物矿层向外延伸的反映.     

综合物化探方法在朱拉扎嘎金矿的应用

朱拉扎嘎金矿 ,经综合物化探普查 ,在大面积覆盖区发现 0 .5km2 高视极化率、中低视电阻率激电异常和低缓磁异常。已施工的 8个钻孔均见矿 ,估算黄金储量大于 30t。沿走向 ,激电异常在北东、南西两端有大幅度向外延伸趋势 ,可能是深部硫化物矿层向外延伸的反映。     

内蒙古朱拉扎嘎金矿区综合物化探方法在普查找矿中的作用

朱拉扎嘎金矿是内蒙古第一物化勘查院最新勘查成果,也是自五十年代开展物化探工作以来,应用综合物化探方法在内蒙古找到大型金矿床的典型案例。在内蒙古西部广大荒漠地区,这一综合物化探找矿方法可以推广使用。     

内蒙古朱拉扎嘎金矿物探化探新进展和超大型远景规模评述

朱拉扎嘎金矿区已圈出3 km2激电异常和磁异常,在综合异常区外侧又圈出15 km2磁异常,使异常区范围扩大到18km2,已施工的18个钻孔均见矿,推断18 km2异常均为原生硫化物金矿层所引起,据估算黄金储量可达1 000 t.     

物化探方法在内蒙古朱拉扎嘎金矿的发现和扩大过程中的作用

1：200000区域化探扫面发现的朱拉扎嘎金矿，经综合物化探普查，在大面积覆盖区发现2km^2高极视化率，中低视电阻率激电异常和低缓磁异常，已施工的18个钻孔均见矿，沿走向，激电异常和磁异常在北东，南西两端有大幅度向外延伸趋势，可能是深部硫化物矿层向外延伸的反映。     

桐柏县老湾金矿带地质物化探特征及找矿模型

老湾金矿带是桐柏－－大别山地区重要的构造蚀变岩型金成矿带,在对矿带成矿地质背景、地球物理、地球化学特征分析的基础上,建立找矿模型及找矿标志,以期望以模型指导找矿,提高矿床研究水平和地质找太效果,通过建立模型及综合找矿评价标志,对矿床 认识程度有了进一步提高,取得了较好的找矿效果。     

物化探工作在海登金矿勘探中的应用

海登金矿位于澳大利亚西澳大利亚州佛雷斯特尼亚绿岩带,属于澳洲三级金成矿远景区。综合矿区地质特征、地球物理特征、地球化学特征,圈出异常靶区。通过槽探验证,确定了化探靶区具有直接找矿意义,为本地区寻找石英脉型金矿提供了依据。     

东坪—后沟式金矿物化探综合找矿模型

着重总结了与偏碱性二长杂岩体有关的东坪－后沟式金矿的地球物理化学异常特征，根据异常特征建立了该类金矿地球物理化学异常综合模型及其化探综合找矿模型，为今后找寻此类金矿尤其是隐伏金矿提供了一套有效的物化探综合找矿方法。     

内蒙古地轴中段新地沟金异常区综合找矿模式

新地沟金异常位于早前寒武绿岩带与花岗岩体外接触带,既是多组多方向断裂交汇处和构造复合部位,又是重力高与重力低过渡型线性梯级带和负磁场区局部升高正磁异常边部,显然是最佳成矿部位。在三、二级查证后,经部分槽探和钻探工程检验,已经证实ＡＰ－５异常带为一中小型金矿床。现已有多家公司在该区办理了勘查开采证,有的矿山业已建成投产。综合研究结果表明,该异常区潜力很大,特别是深部潜力更大,有望发展成为大型金和多金属矿床。     

物化探技术在非金属矿勘查中的应用

阐述了非金属矿产对国民经济的重要性,针对非金属矿产勘查中物化探技术的现状,就物化探技术在非金属矿勘查中应用的意义、发展方向及重点等提出见解。     

Geological and Geochemical Characteristics of the Zhulazhaga Gold Deposit in Inner Mongolia, China

Located in Alxa Zuoqi (Left Banner) of Inner Mongolia, China, the Zhulazhaga gold deposit is the first largescale gold deposit that was found in the middle-upper Proterozoic strata along the north margin of the North China craton in recent years. It was discovered by the No. l Geophysical and Geochemical Exploration Party of Inner Mongolia as a result of prospecting a geochemical anomaly. By now, over 50 tonnes of gold has been defined, with an average Au grade of 4 g/t. The ore bodies occur in the first lithological unit of the Mesoproterozoic Zhulazhagamaodao Formation (MZF), which is composed mainly of epimetamorphic sandstone and siltstone and partly of volcanic rocks. With high concentration of gold,the first lithological unit of the MZF became the source bed for the late-stage ore formation. Controlled by the interstratal fracture zones, the ore bodies mostly appear along the bedding with occurrence similar to that of the strata. The primitiveore types are predominantly the altered rock type with minor ore belonging to the quartz veins type. There are also some oxidized ore near the surface. The metallic minerals are composed mainly of pyrite, pyrrhotite and arsenopyrite with minor chalcopyrite, galena and limonite. Most gold minerals appear as native gold and electrum. Hydrothermal alterations associated with the ore formation are actinolitization, silicatization, sulfidation and carbonation. A total of 100 two-phase H2O-rich and 7 three-phase daughter crystal-beating inclusions were measured in seven goldbearing quartz samples from the Zhulazhaga gold deposit. The homogenization temperatures of the two-phase H2O-rich inclusions range from 155 to 401℃, with an average temperature of 284℃ and bimodal distributions from 240 to 260℃ and 300 to 320℃ respectively. The salinities of the two-phase H2O-rich inclusions vary from 9.22wt% to 24.30wt% NaCl eqniv, with a mode between 23 wt% and 24wt% NaC1 equiv. Comparatively, the homogenization temperatures of the threephase daughter crystal-beating inclusions vary from 210 to 435℃ and the salinities from 29.13wt% to 32.62wt% NaCl equiv. It indicates that the ore-forming fluid is meso-hypothermal and characterized by high salinity, which is apparently different from the metamorphic origin with low salinity. It suggests a magmatic origin of the gold-bearing fluid. The δ^18O values of quartz from auriferous veins range from 11.9 to 16.3 per mil, and the calculated δ^18OH2O values in equilibrium with quartz vary from 1.06 to 9.60 per mil, which fall between the values of meteoric water and magmatic water. It reflects that the ore-forming fluid may be the product of mixing of meteoric water and magmatic water.Based on geological and geochemical studies of the Zhulazhaga gold deposit, it is supposed that the volcanism in the Mesoproterozoic might make gold pre-concentrate in the strata. The extensive and intensive Hercynian tectono-magmatic activity not only brought along a large number of ore-forming materials, but also made the gold from the strata rework. It can be concluded that the ore bodies were mainly formed in late hydrothermal reworking stage. Compared with typical gold deposits associated with epimetamorphic clastic rocks, the Zhulazhaga deposit has similar features in occurrence of ore bodies, ore-controlling structure, wall-rock alterations and mineral assemblages. Therefore, the Zhulazhaga gold deposit belongs to the epimetamorphic clastic rock type.     

福建省物探化探遥感成果回顾

福建物探、化探工作起步于２０世纪５０年代。近半个世纪以来,福建省地质工作者利用物探、化探、遥感等技术在区域地质,深部地质,矿产,水文、工程地质,环境,医学,农业地质等领域取得了丰硕成果,但还存在一定的差距。为进一步提高福建省物探、化探、遥感等技术水平和扩大应用领域,对今后工作提出几点建议和对策。     

内蒙古五岔沟地区物化探异常特征及找矿前景

以1∶10000物化探异常查证成果为基础,依据内蒙古大兴安岭南段成矿带的多金属矿成矿规律,详细分析了五岔沟地区的物化探异常特征,总结出了两种典型的物化探异常类型,一种以Pb、Zn、Ag为主要成矿元素,元素组合为Cu、Pb、Zn、Ag、Bi、Sn、Au、As、Sb、Hg,一般以低阻高极化为特征;另一种以Mo为主要成矿元素...     

云南元阳大坪金矿铅同位素化探评价

通过对云南元阳大坪金矿某切穿矿脉剖面、不同海拔高程矿脉的矿石和围岩的铅同位素组成分析，采用铅同位素系统剖面化探方法对大坪金矿进行了化探评价和隐伏矿的预测分析，指出大坪金矿已进入主矿体的中心部位，深部隐伏矿潜力不大，找矿战略应以扩大横向为主。金矿化与闪长岩铅同位素组成的一致性，表明金矿化受闪长岩的控制。     

铀资源勘查物化探方法最新进展及发展趋势

介绍了目前铀资源勘查中常用物化探方法的最新进展,并指出了其研究与发展方向。