Discussion on the Minerogentic Series of Gold Deposit in Qinghai

Gold is one of the most important strategic minerals in Qinghai province. Based on the metallogenic characteristics, types, ore control factors and spatial distribution of gold deposits, the metallogenic regularities of gold deposits were put forward. It’s divided the pre-Cambrian, Early Paleozoic, Late Paleozoic, Mesozoic and Cenozoic the metallogenic series assemblages, and also their distribution features are discussed which focus on five metallogenic periods. According to the theory of metallogenic series of ore deposits, combining with characteristics of typical gold deposits, twenty metallogenic series are preliminarily divided in Qinghai province. It is pointed out some suggestions about prospecting and exploration of gold deposits in Qinghai.

The reverse thrust-strike-slip structure on the north edge of chai, the reverse thrust-strike-slip structure on the north edge of Kunlun and the gander thrust-strike-slip structure on the north edge of Kunlun are prominent in the control of the gold deposit. Gold-related Metallogenic evolution is: from the relatively quiet tectonic period of the ancient Proterozoic, through the movement of lüliang, regional dynamic heat rheological properties, the invasion of the Granite in the orogeny, consolidation to form a crystalline basement, become part of the supercontinent of Colombia, the formation of this stage gold ore to provide a rich material base. From Nanhua Ji, Qin Qi Kun and its North area are the northern active land margin of Tethys Ocean, and Caledonian forms Qin-Qi-Kun Yang form. Then the multi-Island Arc Basin system was formed, forming the gold and polymetallic ore and rare earth ore related to marine volcanic activity, and the western ocean was closed. Qin, Qi and Kun entered into a collision between the mountains, which resulted in a large concentration of gold and polymetallic elements in the East Kunlun Region (Pan Tong, Ma Meisheng, 1999). The ore-forming region of Sanjiang is still the active continental margin of the ancient Tethys Ocean, and the Island-Arc Basin system forms the non-ferrous polymetallic deposit associated with marine volcanic activity. The Indochinese movement at the end of the Triassic closed the Tethys Ocean and formed three major orogeny belts of East Kunlun, ba yan Qala and Tanggula, providing a material source for orogeny gold deposits. Sedimentary deposits of placer-gold deposits were formed during the Oligocene-Pliocene in the epigenetic geology.

Gold Mineralization Ore Control Conditions
The formation and distribution of rock gold deposits in Qinghai province are mainly controlled by Metallogenic tectonic background, fold fracture activity, strata and strata (rock facies) distribution, magmatic action and surface enrichment.
The details are as follows: 1) Tectonic conditions on the control of gold ore tectonic factors are an important factor in controlling the formation and distribution of gold deposits. The 2) The control effect of formation on mineralization is mainly reflected in two aspects. One is that the formation controls some of the material sources of the deposit, which plays a role in the ore blastocyst. The second is the specific lithology and structural structure control the occurrence of ore body space, pro- 3) The control effect of magmatic activity on gold mineralization is reflected in the formation and enrichment of gold deposit, whether it is basal rock, mid-acidic intrusive rock, basal rock or medium acidic volcanic rock. Gold metallization is basically consistent with the distribution of magmatic activities or intrusive rocks in the province. In the province from the North Qilian-East

1) Time law of gold deposites
Qinghai province, the earliest formation of rock gold ore Precambrian, its industrial significance is not. Caledonian formation in volcanic activity related to the North Qilian Pine Nan ditch gold deposit (Pan et al., 2016). In the West phase of Huali gold deposite, the ore-forming intensity increased, and the for-

Minerogentic Series of Gold Deposit in Qinghai
The definition of Metallogenic series of deposits refers to the natural combination of deposits with intrinsic causative links, in a certain period of geological history, in a certain geological structure unit and tectonic parts, and a certain geological Metallogenic effects related to a group of (Chen, Wang, & Lin, 1998;Chen, Pei, & Wang, 2007). That is, when the ore-forming series of a regional deposit is divided, the four elements of the main ore types should be considered first, including the time, space, and Metallogenic effects of the ore-forming series and the formation of the ore-forming combination. That is a certain period of geological history, Geological tectonic units constitute a certain geological environment, a certain geological mineralization and a group of deposits with a certain causal link. On the basis of the gold characteristics formed in different tectonic environments during different periods of Earth's evolution, etc. (Chen et al., 2007), the results were evaluated according to the potential of Qinghai province (Yang & Pan, 2013). It starts from the north to the south system to collect Hongchuan gold (small), xishanliang gold ore (small), Tianpeng River Sand Gold (Medium), Pine south ditch gold (medium), beach between the Mountain Gold (large), Saiba ditch gold (small), kendec iron gold polymetallic deposit (medium), it Wen chahanxi iron gold polymetallic deposit (medium), wulonggou Gold (large), Manchang gang gold (medium), valgen Gold (large), goluo long WA gold gold ore (large), large field gold (large), dongshenggongma gold ore (small), zaduo placer gold (medium), jika placer gold (medium), grass song downstream placer gold (small) data. We use the deposit Metallogenic series (Group) to divide, that is, the deposit Metallogenic series Group to geological mineralization to further division, and it is known that there is no controversy is the magmatic, sedimentary, metamorphic Metallogenic effects. Also, we separated three combinations, considering the existence of independent geological mineralization of geologic fluid mineralization. Based on the characteristics of mineralization evolution and regional gold mineralization, the mineralization process in Qinghai province is divided into five major mineralization stages, in-

Conclusion
1) Through the geological prospecting work in recent years, gold prospecting has made important progress, on the one hand shows the great potential of gold resources in Qinghai province. On the other hand also requires us to continue to strengthen the study of Metallogenic laws, in order to effectively guide the gold ore prospecting and exploration work, in order to achieve greater breakthroughs.
2) In accordance with the deposit (Genesis/industry) type division, can be divided into five types of gold in Qinghai province, including contact type, marine volcanic rocks, shallow into medium-low temperature hydrothermal type, superposition (compound) ore deposits, ore type gold ore. Among them, the shallow medium-low temperature hydrothermal type is the main, followed by marine volcanic rock type and contact type. Shallow into medium-low temperature hydrothermal type should be the focus of Future Work type.
3 5) The preliminary plan in Qinghai province gold ore-forming series is divided into a series (Group) 20, and enhances the theoretical understanding. The goal is to continue to improve in the future work practice, have better technical guidance to find gold deposite.