地热盖层填图
硅华、铵伊利石与蒸汽加热型明矾石——从轨道识别地热盖层的三个标志。
通过铵矿物、明矾石与硅华发现活动与化石储层盖层。
Geothermal cap assemblage: ammonium illite alongside steam-heated alunite.
传感器看到什么
这个图层在寻找什么。
每种材料的实验室参考光谱，以及传感器波段间隔能捕捉到的部分。阴影区标示方法读取的范围。
它能发现什么
它检测什么。
| 材料 | 典型产出环境 | 可能的混淆因素 |
|---|---|---|
| Ammonium-Bearing Minerals (Buddingtonite / NH4-Illite) | Active and fossil high-enthalpy geothermal reservoir caps | Ordinary illite, whose absorption overlaps it |
| Opaline Silica Sinter | Surface hot spring vents and geyser discharge channels | Calcite travertine encrustations; the thermal-infrared silica feature is not available on any sensor this platform reads |
方法
工作原理。
输入校准反射率，每个像元都对照公开参考库进行拟合。
Narrowband ammonium extraction
Separates the weak ammonium signature from the much stronger clay absorption next door to it.
Sulfate and silica fitting
Steam-heated alunite and the opaline silica hydration shoulder are fitted against library spectra. The thermal-infrared silica feature would corroborate this and is out of reach: no sensor in the registry publishes it.
Cap delineation
Groups steam-heated assemblages into contiguous caps and reports the evaluable fraction of each.
Quality masking
Vegetation moisture anomalies and standing water are excluded.
技术规格
您得到什么，它在什么数据上运行。
所需环境条件
Method and checks are documented in Axine Applied Spectroscopy Paper #2 · Section 4.1.
适用边界
Maps the surface assemblage left by geothermal fluid. Reservoir temperature at depth is not part of it.
