Distribution Characteristics of Mineral Deposits in Southwestern China

根据原计划，实地调查的重点是中国西南地区，特别是四川和贵州。然而，1998年下了一场大雨，长江中游的水流出了长江。为此改变了计划，增加了山东和下秦岭地区。对攀枝花地区及四川、贵州等地的样品进行了表征，结果表明：1）攀枝花存款属正岩浆型，并以副产品形式提供了大量的钛、钒。元素的回收是困难的，因为它们。构成磁铁矿作为固溶体的成员。2)川西康定地区金矿床分布广泛，但规模较小。3)下青林地区产出了大量的脉状金矿床。铜沟存款是一个典型的例子。含金石英脉分布于该区的断裂带中。4)将山东半岛金矿划分为两个类型 ...更多信息 o类型：一种为焦家式，以硅质蚀变为特征;另一种为玲珑式，属脉状。伊卡掌存款是下龙式矿床之一。蚀变分带是围绕矿脉观察的。特征矿物为矿脉附近的石英和向外的钾长石。5)银各庄存款蚀变带中钾长石Al/Is有序度高。这一点与日本第三系以冰长石为特征的金矿床有很大不同。6)滇中哀牢山变质带中的红硅铝榴石具有高钛石榴石的特征。7）中国原生金矿床可分为主产型和副产型。各类矿床金品位均呈对数正态分布。8)将中国砂金矿床分为高金品位类型和低金品位类型，各类型矿床的金品位均呈对数正态分布。9)品位-累积吨数关系表明，中国金矿床由高、中、低品位类型组成。10）低品位矿床的临界品位几乎等于生产矿山的最低品位，中国金矿资源不容乐观。少

According to the original program, the field survey focused the Southwestern China, especially Sichuan and Guizhou. In 1998, however, it was heavily rained, and water flowed out the middle Yantze river. For this reason the program was changed, and the Shandong and Xiaqingling areas were added. The samples collected in the areas as well as Sichuan and Guizhou were characterized, and gave the following results: 1) The Panzhihua deposit belongs to the orthomagmatic type, and supplies considerable amounts of titanium and vanadium as byproducts. The recovery of the elements is difficult, because they. constitute magnetite as members of the solid solution. 2) Many gold deposits occur around the Kanding area, western Sichuan, though they are small in scale. 3) Many gold deposits of the vein type occur in the Xiaqinglin area. The Tonggou deposit is a typical example. The auriferous quartz veins occupy a fractured zone in this area. 4) The gold deposits in Shandong Peninsula are divided into tw … More o types: the one is called the Jiaojia type, which is characterized by silica alteration, and the other is called the Linglong type, which belongs to the vein type. The Yikazhang deposit is one of Xialong type deposits. Alteration zoning is observer around a vein. The characterizing minerals are quartz near the vein, and K-feldspar outwards. 5) The Al/Is ordering state of the K-feldspar occurring in the alteration zone in Yingezhuang deposit is high. This point is quite different from the Japanese Tertiary gold deposits which are characterized by adularia. 6) The rodingite samples collected in the Ailaoshan metamorphic belt, central Yunnan has high titanium garnet 7) The primary gold deposits of China are clearly classified into main product and byproduct types. Gold grades of deposits of each type show a lognormal distribution. 8) The placer gold deposits of China are classified into high and low gold grade types Gold grades of deposits of each type show a lognormal distribution. 9) The grade- cumulative tonnage relation indicates that Chinese gold deposits consist of high, intermediate and low-grade types 10) The critical grade of low-grade deposits is nearly equal to the lowest value of operating mines, and hence the Chinese gold resources are not optimistic. Less