Web9 May 2007 · This alteration assemblage is similar to the early sodic alteration observed at many Fe‐(Cu‐Au) deposits in the district and provides a favourable host for later fracturing … Web1 Apr 2024 · Potassic alteration is observed as a red brick-colored aphanitic assemblage ( Fig. 4 A–C). It is mostly composed of microcline, quartz and pyrite with smaller amounts …
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WebSubduction of the Indian lower crust beneath southern Tibet revealed by the post-collisional potassic and ultrapotassic rocks in SW Tibet. Author links open overlay panel Shi-Hong Tian a b, Zhu-Sen Yang a, Zeng-Qian Hou c, Xuan-Xue Mo b, Wen-Jie Hu d, Yue Zhao a, Xiao-Yan Zhao a. Show more. WebPropylitic alteration is typically the most extensive and peripheral alteration facies developed around porphyry ore deposits. Consequently, with exploration increasingly … selly batik
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Web12 Apr 2024 · In general, the dominant alteration zones associated with Cu mineralization (mainly as stockwork–type veinlets and disseminated pyrite and chalcopyrite) are potassic and to a lesser extent sericitic alteration types (Fig. 6 g). Web1 Mar 2024 · Potassic alteration mainly formed at the medium temperature (microcline ± biotite and muscovite) in the Bafq district, after the sodic and calcic phases associated … Web1 Jan 2016 · Potassic, sericite-chlorite, sericitic, and propylitic alteration assemblages are zoned about the porphyry intrusions. The early and intermineral porphyry intrusions are … selly app edeka download