Abstract
According to the basic geology study, the feature of the element association and the analysis on characteristic element abnormal combination, we think that there are large scale intermediate-basic volcanic (subvolcanic) rocks with some medium acid intruded rocks or vein rocks groups by the work of 1 to 50000 scale geochemical exploration in the north Sanjiang-Wenquanbingzhan area. The fractures of Yanshiping and Wenquanbingzhan area etc. are the big fractures of guide rock and rock-controlled and the fracture zones in the northwest of Chuduo-Chaqiong play an ore conducting and controlling role in the process. The metallogenic condition of anticline structure is better than that of syncline structure. Based on the above consideration, the diagenesis and mineralization in this area are closely related to the intermediate-basic and acidic magmas activity. Copper and polymetallic ores can be classified to volcanics-type and sedimentary-reformed type.
Highlights
Wenquanbingzhan area is located in the middle of Qinghai-Tibet Platean and lies to the north of Tanggula Mountains, where is chillness and oxygen shortage
Medium and low temperature hydrothermal polymetallic mineralization is closely related to intermediate-basic volcanic rocks, and its metallogenic characteristics are similar to those of ordinary volcanic hydrothermal mineralization
The NW-trending fault zone represented by F4 and F5 is the fault zone of ore-conducting and ore-controlling
Summary
Wenquanbingzhan area is located in the middle of Qinghai-Tibet Platean and lies to the north of Tanggula Mountains, where is chillness and oxygen shortage. According to the above works, it had been identified the regional stratigraphic lithology, lithofacies, thickness variations and the regional distribution characteristics and regularities of 40 elements. The first-level structural unit was divided based on the comprehensive study on rock mass, lithofacies, rock association and the contact relation with surrounding rock in this area. This study area was be attributed to the III-level metallogenic belt-Yan shi ping iron, lead, zinc, crystal and gypsum metallogenic belt. From 2012 to 2016, the total area of 1: 50000 stream sediment survey has been to 2416 km and 11035 drainage sediment samples have been quantitative determinated out Cu, Pb, Zn, Ag, Cd, Au, As, Sb, Hg, Ba, W, Sn, Mo, Bi, Cr, Ni, Co, V, Ti, Mn. Geological prospecting has been done in the important abnormity with the spectrum analysis on 100 core samples of ZK02. The author introduces a subject on metallogenic basic geology geochemical analysis in the 1: 50000 geochemical exploration
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