Lubaishan Area Of East Tianshan Car-boniferous Volcanic Origin And Tectonic Environment Analysis

Based on summary of the regional geological setting the basis of the Lu Baishan geochemical studies carried out, The use of petrology, structural geology and other disciplines of knowledge on the volcanic geology, geochemical characteristics of the system, And on this basis, the work carried out metallogenic prediction. Major conclusions of this paper are following:1. The main volcanic rock types of Formation are Shen breccia, pebbly medium-grained tuffaceous sandstone,medium-coarse grained tuffaceous sandstone, tuff, the gravel-bearing coarse-grained tuffaceous sandstone, tuff, Bioclastic calcareous tuff, tuffaceous bioclastic limestone powder, powder bioclastic limestone, bioclastic limestone, bioclastic microcrystalline limestone, bioclastic powder-micro Limestone and tuffaceous microcrystalline limestone containing, in-coarse sparry cemented bioclastic limestone, sparry oolitic limestone cement debris particles, tuff, lava, basalt, basaltic andesite, andesite, dacite, Rhyolite, pyroclastic lava, pyroclastic rocks.2. The standard sample in the original partition map on the mantle, large ion lithophile elements Sr, K, Rb, Ba and so obviously enriched, high field strength elements Th, U, Nb, Hf, Ta and other losses, Including Nb, Ta depletion. And obvious Nb, Ta negative anomalies is a sign of island arc volcanic rocks, Reflecting the B-type subduction volcanic rocks typical of the environment,That is more typical of island arc volcanic rocks of the trace element distribution Patterns show that a typical island arc volcanic environment.3. Combined with Harke diagrams and REE and trace element spider diagrams, That are not homologous volcanic magma, through the discussion of volcanic rocks, Indicating that the oceanic mantle magma source has some links. 4. In the way libraries are grams of Lu Baishan area A Qike fault on both sides of the volcanic rock has obvious mineralization, Shows that this fault control on the role of volcanic rocks and mineralization.5. The present study there for solving the causes of volcanic island arcs, back-arc rift basin and understanding of the differences between the different backgrounds of some significance.6. Lu Baishan were forming along the volcanic prediction, Delineation of exploration feasible Lot 3.