首页> 外文期刊>Geochemistry: exploration, environment, analysis >Using regolith and spinifex chemistry to detect fault-controlled fluids in the Ngururrpa area of northeastern Western Australia, with implications for Pb-Zn mineralization
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Using regolith and spinifex chemistry to detect fault-controlled fluids in the Ngururrpa area of northeastern Western Australia, with implications for Pb-Zn mineralization

机译:利用石油石和旋转化学化学检测西澳大利亚东北部Ngururrpa地区的故障控制流体,对PB-ZN矿化的影响影响

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摘要

Regolith and vegetation (spinifex) chemistry from transects across the Stansmore Fault in the Ngururrpa area of northeastern Western Australia have been used to detect the presence of fault-controlled fluid, and whether the fluid has been in contact with concealed mineralization. On one transect, the fine fraction of the regolith on the fault trace has elevated concentrations of low field strength elements (LFSE), rare earth elements (REE) and some chalcophile elements (Zn and Tl). On the second transect, which is more structurally complex, elevated LFSE, REE and Zn concentrations are coincident with the position of one fault and indicate the location of a second. Both fault traces are indicated by spinifex REE, B, Zn, REE and high field strength element (HFSE) chemistry, and are independently verified by passive seismic data. The wide range in the ionic potentials of elements on or close to fault traces indicates a high fluid flux, whereas high Zn, Tl, Re, Cd, and B concentrations are indicative of sediment-hosted Pb-Zn mineralization. Basin-bounding faults, such as the Stansmore Fault, are spatially related to Mississippi Valley Type (MVT) mineralization elsewhere in the Canning Basin, and rocks hosting sedimentary exhalative (SEDEX)-style mineralization in the adjacent west Arunta Orogen have been reported from the southeastern part of the Ngururrpa area.
机译:从东北西部澳大利亚东北部的Ngururrpa地区跨越斜面断层的近距离植被(Spinifex)化学已被用来检测存在故障控制的流体,以及流体是否已接触隐藏的矿化。在一次横断调中,故障迹线上的极细分数具有升高的低场强元件(LFSE),稀土元素(REE)和一些碳酸化合物(Zn和T1)的浓度升高。在更加结构复杂的第二晶体上,LFSE升高,REE和Zn浓度与一个故障的位置重合,并指示秒的位置。两个故障迹线由Spinifex Ree,B,Zn,Ree和高场强元件(HFSE)化学指示,并且由被动地震数据独立验证。在故障迹线上或接近故障迹线的离子电位中的宽范围表示高流体通量,而高Zn,T1,Re,Cd和B浓度指示沉积物托管的PB-Zn矿化。盆地界限,如斯坦莫的故障,与罐头盆地其他地方的其他地方的密西西比谷型(MVT)矿化有空间有关,并且已经从邻近西arunta oruneogen中举办沉积呼气(Sedex)-Style矿化的岩石Ngururrpa地区的东南部。

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