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| 1 | Rock Series and Genetic Types of Granitoids in the Western Kunlun Orogenic Belt,China显示文摘A systematic geological and geochemical study was conducted for the granitoids of different periods in the western Kunlun orogenic belt. The study indicates that the granitoids belong to tholeiitic, calc-alkaline, high-K calc-alkaline, alkaline and shoshonitic series, and that there are 5 genetic types, i.e., I-, S-, M-, A- and SH-type, of which SH-type is first put forward in this paper, which corresponds to shoshonitic granitoids. | JIANG Yaohui ZHOU Xunruo RUI Xingjian GUO Kunyi HE Jurui YANG Wanzhi | 2001 | Acta Geologica Sinica(English Edition)2001，75，1： | 5 |
| 2 | Ore-bearing Formations and Mineral Resource Prospects of the Peripheral Areas of the Tarim Block显示文摘The tectonic development of the Tarim block has experienced four stages, i. e. Earth’s core accretion and block formation in the Precambrian, margin splitting, opening-closing and piecing up in the Early Palaeozoic, rift formation and plate unification in the Late Palaeozoic, and basin-mountain coupling and landform shaping in the Meso-Cenozoic, forming six ore-bearing formations and ore deposits of various genetic types in the Tianshan Mountains, Kunlun Mountains and Altun Mountains. In the peripheral areas of Tarim there are four giant intercontinental metallogenic belts passing through, the Central Tianshan and southwestern Tianshan belts in the former USSR and the Qinling-Qilian-Kunlun and Palaeo-Tethys belts in China. According to the macro-analysis on the nearly one thousand known deposits (occurrences) and geophysical-geochemical anomalies, and the information from reconnaissance in some areas, the region has very good prospects for mineral resources. Some of the metallogenic belts may well | HE Jurui RUI Xinjian GUO Kunyi WU Quanhuai LIU Hongying WANG Futong SUN Chuanmin | 2000 | Acta Geologica Sinica(English Edition)2000，74，3： | 1 |
| 3 | The modes of gold-migration in the gossan-type gold deposit显示文摘MORE than 30 gossan-type gold deposits have beed discovered in the Middle-Lower Yangtze River Area.The profile of gold-bearing gossan can be divided into four subzones from upper to lower: (i) gold-deficient or gold-leached gossan (Au contents (0.1-0.8)×10-6) transitonal subzone; (ii) secondary goldconcentration subzone (Au(4-20)×10-6); (iii) oxide and sulfide transitional subzone (Au(0.5-1.5)× 10-6); (iV) Primary sulfide ore (Au(0.5-1) × 10-6). Au Concentration in the subzone (ii) is 2-20 times higher than that in subzone (iV). Obviously migration and secondary concentration of Au hadhappened in the process of oxidation of primary sulfides. Some geologists indicated that there would be four modes of gold-migration and concentration:(1) gravity separation (mechanism); (2) organic complex or adsorption; (3) colloidal | HE Jurui and LI Ying Nanjing Institute of Geology and Mineral Resources, Nanjing 210016, China | 1999 | Chinese Science Bulletin1999，44，S2： | 0 |
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