收稿日期: 2023-03-31
修回日期: 2023-11-30
网络出版日期: 2024-05-21
基金资助
中国地质调查局地质调查项目“西藏古堆地区金锑多金属矿产远景调查”(1212011121236);“西藏哲古—日当一带铅锌锑多金属矿产调查评价”(12120114083501);“华东—华南地区金矿资源潜力动态评价”(DD20230376);“湖南怀化—邵阳金矿重点调查区调查评价”(DD20230386)
Application of Integrated Geophysical,Geochemical and Remote Sensing Prospecting Methods in Lajiu Area,Longzi County,Tibet
Received date: 2023-03-31
Revised date: 2023-11-30
Online published: 2024-05-21
西藏隆子县拉九地区成矿地质条件优越,寻找金多金属矿的潜力较大。在综合分析区域地质背景的前提下,通过遥感地质解译研判成矿有利部位,确定拉九地区为成矿预测Ⅳ区,利用1/5万水系沉积物测量进行扫面,圈定了多处化探综合异常。选择在拉九异常(HS-13-B2)内,开展1/1万土壤地球化学剖面测量、壤中1/1万汞气测量及激电中梯测量等大比例尺化探物探工作,初步圈定了2处化探综合异常,发现3个极化体和2处视极化率异常,优选其中有利的成矿靶区,经异常查证和槽探工程揭露,发现3条金矿矿化蚀变带,实现了找矿新发现。基于物化遥综合找矿信息初步建立了以矿床地质—地球化学—地球物理—遥感特征为标志的综合信息找矿模型。实践证明,运用物化遥综合找矿方法可极大地提高找矿效率,该工作为今后在高原山区开展多金属找矿勘查提供了参考。
娄元林 , 钱建利 , 朱志平 , 巴永 , 杨明龙 , 杨桃 . 物化遥综合找矿方法在西藏隆子县拉九地区的应用[J]. 黄金科学技术, 2024 , 32(2) : 241 -257 . DOI: 10.11872/j.issn.1005-2518.2024.02.163
The Lajiu area in Longzi County,Tibet,has superior metallogenic geological conditions and great potential for prospecting for gold polymetallic deposits.On the premise of comprehensive analysis of the regional geological background,the favorable position for mineralization was judged by remote sensing geo-logical interpretation,and the Lajiu area was identified as Zone Ⅳ for mineralization prediction. The 1∶50 000 stream sediment survey was used to sweep the surface,and multiple geochemical comprehensive anomalies were delineated. Then other large-scale geophysical and geochemical exploration work such as 1∶10 000 soil geochemical profile measurement,mercury vapor in soil and induced polarization medium gradient survey were carried out within the Lajiu anomaly(HS-13-B2).Two geochemical comprehensive anomalies,three polarizable bodies and two apparent polarizability anomalies were delineated,among which favorable mineralization target areas were selected.Anomaly verification and trenching engineering reveal that three gold mineralized alteration zones had been found,which had realized new discovery of ore prospecting. Finally,a comprehensive information prospecting model based on geological,geophysical,geochemical and remote sensing charac-teristics had been preliminarily established.The practice has proved that the application of integrated geo-physical,geochemical and remote sensing prospecting methods can greatly improve the ore prospecting rate,and this work provides a reference for the future development of polymetallic prospecting and exploration in plateau mountainous areas.
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