On The Structural Systems And Its Controllability Over Gold-Ore Distribution In The Northwest Jiaodong, China

In this paper, utilizing the basic theory and working method ofgeomechanics, systematical analysis and researches have been given to thestructural ore-controlling regularity for gold-ore mineralization belt in thenorthwest Jiaodong in accordance with a large number of the field geologicalmaterial and testing data.With the purpost of the ore-controlling structure elements, the paper in-quires into the whole process of the genesis and development of the regionalstructural system on the basis of the full and accurate field geological research.The focal points of the researches in the paper are: mineralization structuralsystem, ore-controlling regularity and mechanics of the ore solution migration,the relation between structural activity and mineralization time sequence as thehighlight, the relation between tectonic stress and mechanics of migration, par-tition and enrichment of mineralization elements, and minealization zonation ofthe structural alteration. Still further, using the theories and methods of thegrey system and the Fuzzy Mathematics, this paper reveals the changes of thecharacters, levels, sanges, tendency and the like of the inner and outer ore-con-trolling structure marks, furthermore, and the regularity of the transfer evolu-tion in multimonsional time and space for the mineralization marks and the rel-ative goodness or badness of the orebodies, establishes and mineralizationmodel and prognosticates mineralization prospective zones.The main conclusion and cognition in the paper are: (1) to make off and todetermine the basic framworks of the basal and Mesozoic structural patterns in the northwest Jiaodong, to differentiate and authenticate the regional structuralsystem (structural belt). (2) to go into details on structural features, mechanicalproperties, evolutionary characteristics, the mechanism of formation of thedominant controlling structure-Neocathaysian faulted structure, and it,controllability to the gold-ore belt. (3) to establish a zonality as structure-al-teration-mineralization and their correspondance, to stress the mineralizationtype with the zonality in space in horizontal way mainly. (4) to make known inthe study of tectonogeochemistry that, the mechanism of formation of thegold-ore belt in northwest Jiaodong is the result of activity, migration andenrichment of the mineralizing elements excited by the structural stress, andthat, there exist inner genetic connection between stress field and geochemistryfield, (5) to inverse the structural stress state in the mineralization period in theuse of finite element numerical analoque method, that gives convincing evidencefor the structural macro-analysis, and quantitative and half-quantitative ex-perimental data for the mineralization prognosis. (6) to solve the problems ofestablishing model of the dispersion data of the geological structure on the in-trinsic small samples by use of the theory of the gray system, to bring to lightthe coordinating regularity in time and space for the inner structure of themineralization, to appraise complexly the suitable mineralization region bymeans of the theory of the Fuzzy Mathematics, and to prognosticate the aimand prospective mineralization regions.Authors doctoral thesis has engaged in mineralization analysis taked thetheory of tectonic system as basis and kernel, this train of thought and ways ofreseached are fearsible.