CAJ | 학술논문

该矿床是华北板块南缘秦岭——“中央造山带”产于沉积岩系中的重要金矿床之一，Au的主成矿期为“沉积变质期”。成矿作用演化自早古生代始至印支—燕山期，伴随板块构造逆冲带的发展，经历了漫长的“沉积（矿源）→变质(矿胚)→岩体热量影响(中温成矿元素叠加)→逆冲推覆、走滑脆—韧性剪节(矿体成型、初步定位)→伸展构造(破坏矿体、最终定位)演化的历程，与脆—韧性剪切带密切相伴”。应属板块构造逆冲带浊积岩-剪切带型层控金矿床，其快速定位预测标志具普遍性指导意义。
해광상시화북판괴남연진령——“중앙조산대”산우침적암계중적중요금광상지일，Au적주성광기위“침적변질기”。성광작용연화자조고생대시지인지—연산기，반수판괴구조역충대적발전，경력료만장적“침적（광원）→변질(광배)→암체열량영향(중온성광원소첩가)→역충추복、주활취—인성전절(광체성형、초보정위)→신전구조(파배광체、최종정위)연화적역정，여취—인성전절대밀절상반”。응속판괴구조역충대탁적암-전절대형층공금광상，기쾌속정위예측표지구보편성지도의의。
Ma′anqiao gold deposit is one of mast important gold deposits, occurring in sedimentary strata, in the middle-west part of Qinling——“Central Orogen”, China and reaches into a large scale in reserves; and its potential of resources adds year after year. The gold deposit has typical significance in the metallogenic mechanism and evolutionary pattern and can be compared with well　known gold deposits of the samp type at home and abroad. 　　Major achievements of the study are as follows. 　　1.It is clearly pointed out that the metallogenic geotectonic environment of Ma'anqiao gold deposit is located at the plate obduction zone in the fore-arc basin on south margin of North China plate. The major interface of Shang-Dan fault belt on south margin of North China plate is removed southward 10 km away, lying on the Banfangzi-Xiaowangjian line, sharply distincting from formerly northern margin of Yangtze plate. 　　2.The age of ore-bearing rock series "Wangjiahe Fm.", being certainly confirmed, could be attributed to the early Paleozoic Era rather than the Devonian Period, being concluded before. 　　3.The Danfeng Gr. Microlithon(Pt3-PZ1dn) and Dacaotan Gr. Microlithon(D3) have been breaked up from the formerly-designated Davonian Wangjiahe Fm., therefore, the existence of the partial carboniferous system has been denied; the new regional stratigraphic sequence has been reordered and the new appearance(PZ1wj) of ore-bearing rock series “Wangjiahe Fm.”has been set up on the basis of two suits of conglomerate. In addition, it is further expounded that Wangjiahe Fm. Should belong to a series of turbidite of the deep- water clinoform facies and is a component part of the important geological body on south margin of North China plate, which is formed by several microlithons overlapped. 　　4.Described in detail that the metallogenesis of Au in gold deposit of this type underwent, from the early Paleozoic to early Yenshan time, a very long evolutionary course, I.e. “Sedimentation(source of ore)→Reformation of metamorphism(embryonic ores)→Thermal action of rock bodies(mesothermal metallogenic elements overlapped)→Obduction-nappe, strike-slip and brittle-ductile shearing(initially positioning)→Extensional structure(finally positioning),closely related with brittle and ductile shear zone”; so the comprehensive metallogenic model and evolutionary pattern of gold deposit of this type have been set up. 　　5.Obviously pointed out that major metallogenic epoch of Au in gold deposit of this type comes about only once(Sedimento-metamorphic stage); the source of metallogenic metaerials is closely related to the stratigraphic unit; the absorption of peat layers and metamorphic-differentiated quartz veins are the major factors, although there occurs mutliperiodic mesothermal superposition-reformation of ore-forming elements in later stage, yet the scope and power of its whole influence on gold is not too much; and its metallogenic type is attached to the turbidite-shear zone type stratabound gold deposit in the plate tectonic obduction zone. 　　6.Sysmatically established a suite of rapid-positioning marks and effective predicted methods of gold deposits of this type; and made proposals for the prediction of gold deposits of this type that the research work should be put emphasis on "light colored lithofacies" (made from metamorphic mineral assemblegs rather than thermal-altered products) and tectonic melange accumulation, by means of the sedimentology and the dynamic mechanism of shearing, as to predict the favorable metallogenic environment and position of gold ore bodies. 　　7.Put forward some detailed suggestions for further ore-finding at different levels. 　　8.Compiled out a set of comprehensive maps of regional geology and ore deposits which provided the overall and systematical information for the deeply studying and utilization in this area.