Descriptions of three new species of Mitridae (Mollusca: Gastro-poda) from South China Sea

Three new species of Family Mitridae (Mollusca: Gastropoda) from the South China Sea are described in the present paper. They are Ziba aglais sp. nov. B. LI & S. ZHANG, Neocancilla daidaleosa sp. nov. B. LI & X. LI, and Mitra holkosa sp. nov. B. LI. Their systematic positions are also discussed.

云南泸水自把铅矿矿床地质及成因

矿床受地层及断层双重控制,走向长大于3千米,共圈出V1、V2、V3三条矿体。含矿岩石以透辉石矽卡岩为主,矿石工业类型为硫化铅矿石和氧化铅矿石。矿床成因类型为与花岗岩有关的含矿热液沿破碎带充填-交代形成的矽卡岩型铅矿床。

泸水自把铅矿硫化矿石物质成份与赋存状态

自把铅矿V1矿体产于断层破碎带中,受地层及容矿断层双重控制,为硫化铅矿石,4种类型26种矿物互相穿插、相互包裹,影响解离和回收。