遥感蚀变异常信息对斑岩型铜矿床的有效性——以云南宝兴厂斑岩型铜钼矿床为例

发布时间：2018-05-16 07:44

本文选题：斑岩型铜(钼)矿床 + 蚀变矿物　；参考：《地质与勘探》2017年03期

【摘要】：云南宝兴厂铜钼矿床是西南三江成矿带上与富碱斑岩有关的典型斑岩型矿床,产出于金沙江-哀牢山富碱侵入岩带的中部东侧。本文引用基于"广义自相似性"与"局部奇异性"多重分形理论的S-A法,提取了宝兴厂铜钼矿床的石英、钾长石、绢云母、绿泥石和绿帘石等特征蚀变矿物的遥感蚀变异常信息,这些蚀变异常信息由内向外依次出现石英(钾长石)→绢云母→绿帘石(绿泥石)的分布特征,并且多沿北东、北西向展布,呈条带状或环带状分布于侵入岩体的内部或外围附近,与传统经典的硅化(钾化)带→绢英岩化带→青磐岩化带的蚀变分带模式大致相当,但这些遥感蚀变异常信息并不完全出现在出露的侵入体的接触带及其两侧。野外实地验证表明此次获得的遥感蚀变异常信息有较好的矿化指示效果,可以为该地区斑岩型铜钼矿床的进一步找矿提供一定的指导。
[Abstract]:Baoxingchang Cu-Mo deposit in Yunnan Province is a typical porphyry deposit related to alkali-rich porphyry in the Sanjiang metallogenic belt of southwest China, which occurred in the east of the middle part of the Jinshajiang-Ailaoshan alkali-rich intrusive belt. In this paper, the S-A method based on the theory of "generalized self-similarity" and "local singularity" is used to extract quartz, potassium feldspar and sericite from Baoxingchang Cu-Mo deposit. Remote sensing alteration anomaly information of characteristic alteration minerals such as chlorite and verdant, which appears the distribution characteristics of quartz (potassium feldspar) sericite verdant (chlorite) from inside to out, and mostly along the north and east, NW distributes in a banded or annular pattern near or near the inner or outer part of the intrusive rock mass, which is roughly similar to the alteration zone model of the traditional silicification (potassium) zone in the zigzakuanlilizbelt, which is similar to that of the traditional silicification (potassium) zone. However, these remote sensing alteration anomalies do not appear completely in the contact zone of the exposed intrusions and their sides. Field verification shows that the obtained remote sensing alteration anomaly information has good mineralization indication effect and can provide some guidance for further prospecting of porphyry copper-molybdenum deposits in this area.
【作者单位】：中国地质大学(北京);云南大学资源环境与地球科学学院;云南大学遥感地质研究中心;国家地质实验测试中心;
【基金】：中国地质调查局项目(DD20160220);中国地质调查局项目(12120113095400、12120113002500) 中国地质科学院基本科研业务费项目(YYWF201619) 国家自然科学基金项目(41072073) 国土资源部公益性行业科研专项(201211078)联合资助
【分类号】：P618.41;P627

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