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| 1 | Analysis of chemical composition of melt inclusion of beryl in pegmatite and discovery of zinc-spinel by electronic probe显示文摘The compositions of daughter mineral of melt inclusion in beryls, which are from pegmatites of Keketuhai in Xinjiang and Mufushan in Hunan, have been analyzed by electronic probe. Ten kinds of mineral, such as beryl, zinc-spinel, mica, quartz, magnetite, etc., which consist of different mineral associations have been identified. The zinc-spinel existing in two dif- | Zhaolin Li Wenlan Zhang Rongyong Yang Wen Li Wei Zhai | 1999 | Chinese Science Bulletin1999，44，21： | 2 |
| 2 | Leaching experiment research on host rocks of Qiaogashan gold deposit in Shanshan County, Xinjiang, China显示文摘1 Geological setting of the deposit THE Qiaogashan gold deposit is located at contact zone of middle Tianshan terrance and south Tianshanback-arc basin, and near the latter side. The orebodies are controlled by middle Tianshan brittle-ductileshear zone. The main ore types are auriferous quartz veins and fractured and alterated rocks. The southpart of the deposit is hosted in striking sheared Devonian rocks, while the north part in a diorite body,which was deformed by a nape shear zone. 2 Geology and geochemistry of host rocks The host rocks of south part of the deposit are Devonian detrital stone of terrigenous origin, interlayering volcanic detrial stone of back-arc basin facies, which locally suffered intensive ductile-brittle shearing. The rock type is composed mainly of gray-green siltstone, poststone, metasiltstone, etc., and a se- | ZHAI Wei, YANG Rongyong, LI Zhaolin and WU Jianjun Department of Earth Sciences, Zhougshan University, Guangzhou 510275, China State Key Laborntory of Metallogenesis, Nanjing University, Nanjing 210093, China | 1999 | Chinese Science Bulletin1999，44，S2： | 0 |
| 3 | The Formation and Evolution of the Lujiang-Zongyang Volcano-Structural Depression in Anhui and Its Relation to Mineralization显示文摘The Lujiang-Zongyang volcano-structural depression resulted from the combined action of tectonism and volcanism. Its evolution progressed through five stages from 190 to 105 Ma B.P., during which nine types of metal and pyrite deposits were formed. These deposits show obvious regularities in the temporal-spatial distribution and have certain genetic relation, forming a minerogenetic series related to shoshonite within or around the volcano-structural depression on the basement that sank for a long period of time. This paper suggests a four-dimensional model of the formation and evolution of a typical volcano-structural depression and its related mineralizalion in a transition belt from the active margins to the inner part of a plate under alternating shear-compressive and shear-extensional stress conditions, but predominantly shear-extensional stress conditions. | Ren Qijiang, Wang Dezi, Xu Zhaowen, Dong Huogen, Pan Longquan, Yang Rongyong, Fang Changquan and Hu Jin’an Department of Earth Sciences, Nanjing University, Nanjing, Jiangsu Fei Zhenbi | 1993 | Acta Geologica Sinica(English Edition)1993，67，4： | 0 |
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