Application of remote sensing geology in mineral prospecting in the Ke’eryin rare metal ore concentration area in the western Sichuan Basin

doi:10.6046/zrzyyg.2023336

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Abstract

The Ke’eryin rare metal ore concentration area in the western Sichuan Basin (also referred to as the Ke’eryin ore concentration area), located in the eastern segment of the Songpan-Ganzi metallogenic belt, boasts abundant granitic pegmatite-hosted rare metal resources like lithium, niobium, beryllium, and tantalum. It stands as one of the most concentrated areas for hard-rock rare metal deposits in China, following the granitic pegmatite-type rare metal ore concentration areas in the Koktokay area in Altay in Xinjiang, and the Jiajika and Jiulong areas in the western Sichuan Basin. The Ke’eryin ore concentration area is characterized by tectonic denudation and deeply cut high mountains, resulting in inconvenient transportation, dense vegetation, and steep terrains. Consequently, most parts of the area are inaccessible to humans, hindering the implementation of traditional geological surveys. Based on the features and interpretation keys of high-resolution remote sensing images for ore-bearing granitic pegmatite veins in known deposits within the Ke’eryin ore concentration area, this study performed laboratory interpretation and partial field verification of these veins, revealing the distribution patterns and characteristics of granitic pegmatite veins in the area. Rare metal deposits hosted by granitic pegmatite veins intruded into weak structures such as fault zones and surrounding rock fractures within a range of 0 km to 5 km on the margin of the Ke’eryin complex rock mass. The exposed granitic pegmatite veins and boulders were identified as the most direct indicators for locating rare metal deposits. A prospecting method based on remote sensing geology was developed for highly vegetation-covered areas in the Ke’eryin ore concentration area, effectively addressing the limitations of traditional geological prospecting methods. Using the developed method, this study determined three critical prospecting areas in the northern and northwestern portions of the Ke’eryin complex rock mass, establishing them as the targets for subsequent strategic prospecting breakthroughs.

Keywords Ke’eryin rock mass rare metal ore concentration area remote sensing geology granitic pegmatite vein

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Issue Date: 09 May 2025

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	Junbo SHI
	Jie ZHANG
	Na HOU
	Huishan ZHANG
	Xiaoping DING
	Jianjun DU
	Haiyang ZHU

Cite this article:

Junbo SHI,Jie ZHANG,Na HOU, et al. Application of remote sensing geology in mineral prospecting in the Ke’eryin rare metal ore concentration area in the western Sichuan Basin[J]. Remote Sensing for Natural Resources, 2025, 37(2): 117-127.

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https://www.gtzyyg.com/EN/10.6046/zrzyyg.2023336 OR https://www.gtzyyg.com/EN/Y2025/V37/I2/117

Fig.1 Structural map of the Songpan-Ganzi orogenic belt(revised according to reference[13])

Fig.2 Distribution of magmatic rocks in the Ke’eryin rare metal ore concentration area

Tab.1 The remote sensing interpretation keys of granitic pegmative veins and its rolling rocks

Fig.3 Interpretation and verification of granitic pegmatite veins in the known deposits

Fig.4 Interpretation and verification of granitic pegmatite rolling stones in known deposits

Fig.5 Interpretation and verification of granitic pegmatite vein and it’s rolling stones on the east of Lijiagou north lithium mine

Fig.6 Interpretation and verification of granitic pegmatite veins in the Shenshan Village

Fig.7 Interpretation and verification of granitic pegmatite veins in the Jiaomuzu area

Fig.8 Interpretation and verification of granitic pegmatite veins in the northern of Kalu temple

Fig.9 Interpretation and verification of granitic pegmatite veins in the the southern of Kalu temple

Fig.10 Remote sensing geological interpretation achievements and preferable ore-finding area

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