Intricate miniature carvings in Liangzhu jade discovered at Fanshan site in the .considered the earliest known large-scale water management project in the world, controlled an area of nearly .6 ft 7 in – 23 ft 0 in). In their central section, a pair of parallel dikes created a channel-like structure for water storage and.
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The Fanshan deposit is located along the east side of the Wenzhou-Zhenhai Fault, in the Fanshan caldera basin, an Early Cretaceous 9 km-long, 6 km-wide elliptic-shaped basin (Fig. 1, Fig. 2 a). Abundant alunite, pyrophyllite, quartz, and minor topaz developed in the Fanshan district, which formed an 8-km 2 lithocap.
Pingpengling area is the most proximal area to the heat source of Fanshan basin. The Fanshan alunite deposit, located in Cangnan County, Zhejiang Province, is the largest alunite deposit in China, which developed a lithocap with an extensive advanced argillic alteration.
Two types of alunite have been identified by mineral chemistry. Efforts have been made to use the SWIR features and the mineral chemistry of alunite to vector to the possible magmatic-hydrothermal center in Fanshan, which could provide new insights to locating magmatic-hydrothermal centers for other lithocaps elsewhere.
K-rich and Na-rich alunite have diagnostic Na/K value, Pos1480 and mineralogy. Pos1480 and ratios of Na/K, Rb/Sr*1000, etc. can be used to vector heat center. Pingpengling area is the most proximal area to the heat source of Fanshan basin.
6. Conclusions The Fanshan district developed a typical lithocap, consisting of advanced argillic alteration. According to the results of SWIR reflectance spectroscopy, eight types of minerals: alunite, pyrophyllite, kaolinite, dickite, illite, phengitic muscovite, chlorite, and topaz —were identified.
Geology of the Fanshan alunite deposit The Fanshan deposit is located along the east side of the Wenzhou-Zhenhai Fault, in the Fanshan caldera basin, an Early Cretaceous 9 km-long, 6 km-wide elliptic-shaped basin (Fig. 1, Fig. 2 a).
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