“There’s no theory behind mineral exploration predictions in prospecting areas—everything relies purely on experience!” If you still think that way in the future, it’ll mean you’re already outdated.
　　
　　On December 18, entrusted by the Department of Science and Technology and International Cooperation of the Ministry of Natural Resources, the Department of Geological Exploration (Mineral Exploration Office) of the Ministry of Natural Resources organized relevant experts in Beijing to conduct an appraisal of the research results titled “Theories and Methods for Ore-Prospecting Prediction in Exploration Areas.”
　　
　　More than ten experts, including five academicians—Chen Yuchuan, Tang Zhongli, Pei Rongfu, Zhai Yusheng, and Zhai Mingguo—reviewed the research report and related materials. After thorough questioning and discussion, they unanimously concluded that this achievement systematically and fully applies the scientific findings from ore deposit studies to mineral exploration prediction in prospecting areas, thereby enriching China’s theory of mineral exploration prediction, enhancing the success rate of predictions, and making mineral resource forecasting more scientifically sound.
　　
　　Che Changbo, Deputy Director of the Department of Geological Exploration at the Ministry of Natural Resources, also fully recognized the practical significance of this achievement. He stated, “This achievement has been widely applied in nationwide efforts to identify successor resources for critically endangered mines, explore deep and peripheral areas of existing mines, and implement integrated exploration programs. It has significantly boosted the success rate of mineral exploration predictions in exploration areas. We believe that the wider adoption of this achievement will play a crucial role in further advancing the strategic initiative to achieve breakthroughs in mineral exploration.”
　　
　　It’s truly no easy feat to earn such high praise from the “big shots” in the geology industry—and yet, it’s entirely well-deserved. After all, prior to this, China’s theoretical framework for mineral exploration and prospecting prediction in exploration areas was virtually a blank slate.
　　
　　 Mineral exploration prediction in the exploration area urgently requires theoretical guidance.
　　
　　As is well known, mineral resource prediction is broadly categorized into regional mineral resource prediction and exploration-area prospecting prediction. The former, also referred to as medium- and small-scale prediction (with a scale of ≤1:50,000), primarily aims to identify prospective areas for mineral exploration. The latter, known as large-scale prediction, primarily serves the purpose of planning exploration projects and delineating the precise locations of ore bodies.
　　
　　Since the 1980s, numerous regional mineral exploration theories and methodologies have been developed, researched, and summarized both domestically and internationally. Examples include the “Triadic” digital mineral exploration and quantitative prediction evaluation methodology proposed by Academician Zhao Pengda and others; the “Comprehensive Information Prediction Methodology” proposed by Wang Shicheng and others; and the “GIS-Based Mineral Exploration Methodology” proposed by Zhu Yusheng and Xiao Keyan, among others.
　　
　　However, the concept of large-scale mineral resource prediction was only proposed in the 1980s, when China began its “Metallogenic Provinces Mapping” initiative. At that time, the concept lacked clearly defined content, and to this day, a comprehensive theoretical research framework has yet to be established.
　　
　　Tracing the history of mineral exploration in China, during the 1950s to 1970s, China primarily drew on the practices of the former Soviet Union. Basic data were obtained through methods such as 1:200,000 regional geological surveys, 1:200,000 regional geochemical surveys, airborne magnetic surveys, and regional gravity measurements. These foundational data were then used either directly to identify mineral deposits through regional-scale work, or to confirm mineral deposits based on anomalies detected through geophysical and geochemical exploration.
　　
　　Starting in the 1980s, with the launch of the second nationwide regional geochemical survey campaign, a gold rush in mineral exploration driven primarily by stream-sediment geochemical data was set off. During this period, the vast majority of mineral deposits were discovered after verification of geochemical anomalies. Up until the end of the 20th century, China's mineral exploration efforts were largely focused on identifying surface or shallow-level ore deposits.
　　
　　Since the beginning of the 21st century, driven by the rapid development of industrialization and urbanization, China has once again set off a new wave of mineral exploration. As the level of exploration work continues to improve, the field of mineral exploration is undergoing a historic transformation—from primarily focusing on surface or shallow deposits to increasingly targeting hidden and deep-seated mineral resources.
　　
　　Mineral deposits are becoming increasingly difficult to find, yet there still lacks a systematic theoretical and methodological framework for large-scale mineral exploration and prediction. How can this be acceptable? In reality, China’s exploration and prospecting efforts in various survey areas remain largely at an empirical stage—each case is treated individually without any systematic or integrated approach, either in theory or in methodology. If we fail to embark on further exploration and synthesis now, the search for minerals will inevitably continue to rely solely on “experience”!
　　
　　In the early 21st century, in response to China’s aging mines that had been exploited for decades or more, the state organized efforts to develop the “National Outline for the Exploration of Alternative Resources to Sustain Critical Mines.” Following a comprehensive survey, 230 mines were selected for focused deep-exploration efforts. This project, which lasted eight years, achieved remarkable exploration results and also uncovered numerous new mineralization phenomena.
　　
　　The reporter from China Mining News learned that the “Theory and Methods for Mineral Exploration Prediction in Prospecting Areas” is precisely one of the three tasks proposed in the aforementioned outline: “conducting surveys of mine resource potential, implementing exploration and prospecting for replacement resources in critically endangered mines, and summarizing large-scale mineral exploration prediction theories and methods.” The first two tasks have already been completed, and their respective achievements have both received the First Prize for Scientific and Technological Progress from the Ministry of Natural Resources. The primary goal of the third task is to summarize the working methods employed in the nationwide special campaign for exploring replacement resources in critically endangered mines, as well as to study large-scale mineral exploration prediction theories and methods.
　　
　　Since the theoretical framework was proposed in 2009, the Development Research Center of the China Geological Survey (also serving as the Technical Guidance Center for Mineral Exploration under the Ministry of Natural Resources) has pooled its resources and, with Researcher Ye Tianzhu as the chief expert, organized hundreds of experts and scholars from geological research institutes—including the Institute of Geomechanics at the Chinese Academy of Geological Sciences, the Beijing Institute of Geology and Mineral Resources, the Institute of Geology and Geophysics at the Chinese Academy of Sciences, China University of Geosciences (Beijing), China University of Geosciences (Wuhan), Nanjing University, Jilin University, and Kunming University of Science and Technology—to conduct specialized research and compile a comprehensive summary of this theoretical system.
　　
　　 Fundamentally solve the problem of analogical uncertainty.
　　
　　There is no doubt that this is a tremendously large-scale systems engineering project.
　　
　　The specialized research team led by Ye Tianzhu and others is well aware that, in fact, the geological exploration community—both field workers and researchers—has long been paying close attention to and exploring exactly which technological approaches should be adopted for the exploration and discovery of concealed and deep-seated mineral deposits.
　　
　　Generally speaking, the exploration procedure for mineral prospecting in an exploration area is roughly as follows: First, select prospective areas by utilizing regional basic data as well as clues from existing mineral deposits and mineralization points. Second, carry out large-scale geological mapping along with geophysical and geochemical surveys. Third, after comprehensively analyzing prospecting information—including surface mineralization and alteration indicators as well as geophysical and geochemical anomalies—conduct exploration engineering verification.
　　
　　As a result of this approach, some of the large- and medium-sized mineral deposits discovered have turned out to be industrial ore deposits after being transferred to the evaluation stage. However, in most cases, only mineralization-related alteration phenomena and sporadic industrial ore bodies have been identified. This is precisely the basis for the commonly held view that the success rate of prospecting for large- and medium-sized mineral deposits is only around 5%.
　　
　　Therefore, many times, after completing the above-mentioned three-step investigation process, investigators still find themselves caught in a state of hesitation and confusion.
　　
　　Besides giving up, what’s the next step?
　　
　　Currently, there are roughly three main approaches: First, placing hopes for breakthroughs in mineral exploration on the application of deep geophysical and geochemical methods—for example, the currently popular use of electromagnetic methods and structural geochemical superimposed halo techniques—in an attempt to solve the challenges of locating hidden and deep-seated ore deposits through these deep exploration methods. Second, integrating the practical experience of exploration personnel: by analyzing mineralization indicators and combining them with geophysical and geochemical data, proposing potential exploration hypotheses and then designing exploration projects to verify these hypotheses. Third, conducting specialized research—typically involving rock and mineral testing to obtain microscopic data such as mineral genetic characteristics, isotopic compositions, trace elements, and fluid inclusions—and using these data to perform analogical predictions based on known ore deposit models. Combined with geophysical and geochemical findings, this approach helps formulate deep-exploration verification plans.
　　
　　Although the three scenarios mentioned above can all achieve a certain degree of success in mineral exploration, overall they still remain at the level of “case-by-case analysis.” Theoretical research on mineral exploration prediction in exploration areas has long been stuck in a state of compiling case studies based on summarized exploration experiences, which leads to significant uncertainty in exploration results when actual analogical applications are made.
　　
　　Currently, the commonly used comparative ore deposit study method—based on ore deposit models—relies on descriptive conceptual models as analogs for predictive data. Moreover, a large body of research on typical ore deposits has so far been limited to the description of microscopic data related to ore-forming processes, without yet unraveling the underlying ore-forming mechanisms. Furthermore, applying classical ore deposit models to different regions still faces challenges due to differences in ore-forming conditions and other factors. Consequently, this approach has yet to fundamentally address the issue of uncertainty inherent in analogical comparisons.
　　
　　To address this issue, a team of experts led by Ye Tianzhu conducted theoretical research and, drawing on examples of various types of ore deposits in China, attempted to take the exploration of ore-forming mechanisms as a starting point. By identifying characteristic indicators of ore formation amidst the complex and diverse geological phenomena associated with mineralization, they developed a geological model for prospecting prediction in exploration areas, thereby resolving the uncertainty surrounding prospecting prediction indicators.
　　
　　 The basic idea is to identify definitive mineralization indicators.
　　
　　What is the uncertainty associated with ore-prospecting predictive indicators? And how exactly is it related to ore-prospecting prediction itself? In fact, this involves highly specialized geochemical theoretical research.
　　
　　It’s important to note that the mineralization process is highly complex, and there are numerous and diverse types of mineral deposits. The massive accumulation of mineral resources is influenced by a wide array of intricate factors. At present, however, our current level of technology and laboratory capabilities do not yet allow us to conduct a comprehensive theoretical synthesis.
　　
　　However, since elemental geochemical characteristics serve as the foundation or key link for understanding ore deposit genesis and conducting mineral resource exploration, experts such as Ye Tianzhu have taken a bottom-up approach, starting from the most fundamental elemental geochemical features. They focus their research on the critical transition of massive metal migration and concentration into solid minerals within ore-forming structural surfaces—this brief yet pivotal process—and aim to unravel the extraordinarily complex mechanisms underlying ore formation.
　　
　　They believe that the wealth of analytical and experimental data on modern geochemical fundamental theories and mineral-forming processes, coupled with the abundant research findings on typical ore deposits, have all provided favorable conditions for exploration and research in this field. By applying ore deposit geochemistry theory to interpret complex ore-forming geological phenomena, they investigate the changes in physicochemical conditions that occur as ore-forming substances transition from a fluid state to a solid mineral state after reaching their current locations within ore deposits. From the perspective of elemental geochemical characteristics, they reconstruct the entire ore-forming process and thereby address the uncertainty surrounding ore-prospecting indicators.
　　
　　Specifically, to address the uncertainty associated with using ore-forming geological phenomena as indicators for mineral exploration, they adopted a two-pronged approach. First, they examined both the intrinsic and extrinsic factors that govern the geochemical behavior of elements. According to fundamental geochemical principles, the factors determining elemental geochemical behavior can be categorized into intrinsic and extrinsic factors. Intrinsic factors include atomic structure, bonding modes of elements, types of chemical bonds, electronegativity, and affinity. In fluid systems, the key factors influencing the speciation and geochemical behavior of elements are ionic radius and ionic charge. As a result, various complex and diverse geological phenomena are formed during ore-forming processes. Second, they focused on the study of external environmental conditions. The extrinsic factors governing elemental geochemical behavior encompass basic physicochemical parameters such as ambient temperature, pressure, acidity/alkalinity, and redox conditions. The external conditions that trigger changes in these fundamental physicochemical parameters are geological processes, which fall into five major categories: sedimentation, volcanism, magmatic intrusion, regional metamorphism, and large-scale deformation.
　　
　　Thus, they concluded that the internal factors determining ore formation are the geochemical characteristics of elements, while the external factors are geological conditions.
　　
　　Through research conducted from two perspectives, it is possible to identify and distinguish between geological phenomena related to mineralization—distinguishing between accidental and inevitable phenomena. They define as inevitable phenomena those that exhibit universal characteristics and can be explained by the theory of elemental geochemical behavior. These inevitably occurring phenomena, which can arise under a wide variety of geological conditions, are established as deterministic exploration indicators. Such indicators are confirmed and summarized through a combination of approaches: interpretation based on fundamental geochemical theories, verification using thermodynamic and mineralogical experimental data, confirmation by geological evidence from typical ore deposits, and validation via practical exploration predictions.
　　
　　The technical approach has been resolved, and the basic idea is gradually becoming clear.
　　
　　 The research findings directly support mineral exploration efforts.
　　
　　Based on nearly six years of experience and field investigations, the special research team has developed a brand-new theoretical and methodological system for mineral exploration prediction, drawing on recent discoveries and new insights gained from deep-resource exploration in mines across the country, and building upon the foundation of 230 exploration projects and 129 typical ore deposits under the national special program for identifying successor resources in crisis mines.
　　
　　Ye Tianzhu introduced to a reporter from the China Mining News that this is a “three-in-one” exploration and prospecting prediction theory and methodology system based on “ore-forming geological bodies, ore-forming structures and structural planes, and characteristic indicators of ore-forming processes.” Grounded in exploration-area-based mineral resource prediction, it focuses particularly on prospecting in the deep and peripheral areas of mines as well as on discovering hidden ore deposits, and boasts high practical applicability.
　　
　　This theory introduces the following innovations in the theoretical and methodological approaches to mineral exploration and ore prospecting: First, it adopts an integrated approach to studying the temporal, spatial, material, and energetic aspects of ore-forming processes, thereby establishing a theoretical framework for the study of ore-forming geological bodies. Second, by examining the relationship between ore formation and tectonic processes, it has developed a systematic theoretical and methodological framework for the study of ore-forming structural planes. Third, through the integrated study of ore-forming geological bodies, ore-forming structures and structural planes, characteristic indicators of ore-forming processes, and spatial model structures, it has created a “three-in-one” theoretical and methodological system for prospecting and prediction in exploration areas. Fourth, it fills a gap in the theoretical and methodological systems for large-scale mineral resource prediction, closely integrating research in ore deposit geology and ore deposit geochemistry with mineral exploration, so that research findings directly support ore-prospecting efforts.
　　
　　It is reported that this theoretical framework has now been applied to exploration efforts at numerous crisis mines and old mines across China, yielding remarkable results. In particular, it has provided effective approaches and methods for breaking through the impasse in exploration areas that have long been plagued by the “seeing stars but not the moon”—areas that have resisted breakthroughs despite sustained efforts. Among these, the theory has played a direct role and made significant contributions to exploration breakthroughs at several mines, including the Jiaodong Gold Mine, Hongtoushan Copper Mine, Dachang Lead-Zinc Mine, Denggezhuang Gold Mine, and Shilu Iron Mine. Moreover, the Silicocalcite Interface Mineralization Theory has gained widespread recognition and promotion in exploration projects such as the Kangjiawan Lead-Zinc Mine in Hunan, the Qixia Mountain Lead-Zinc Mine in Jiangsu, the Yagui La Lead-Zinc Mine in Tibet, the Mengya’A Lead-Zinc Mine in Tibet, the Jiama Copper-Lead-Zinc Polymetallic Mine in Tibet, the Yinshan Silver Mine in Zhejiang, the Caixia Mountain Lead-Zinc Mine in Xinjiang, the Yushui Copper Mine in Guangdong, the Gongpengzi Copper Polymetallic Mine in Heilongjiang, the Taochong Iron Mine in Anhui, the Lizhu Iron Mine in Zhejiang, the Luoyang Iron Mine in Fujian, and the Makeng Iron Mine in Fujian.
　　
　　According to staff from the Mineral Exploration Technology Guidance Center of the Ministry of Natural Resources, among the 398 projects effectively guided by this theoretical approach, 62 have yielded large-scale additional resource reserves, and 117 have yielded medium-scale additional resource reserves.
　　
　　This theory takes large-scale mineral exploration prediction in the prospecting area as its starting point, uses the relationship between elemental geochemical characteristics (internal factors) and ore-forming geological processes (external factors) as its entry point, and focuses on the migration, precipitation, and accumulation of ore-forming materials. By studying the universal laws governing the ore-forming process, it identifies geological indicators for mineral exploration prediction and proposes a geological methodology for mineral exploration in prospecting areas.
　　
　　Experts have commented that this achievement has cracked the challenging problem of transitioning from two-dimensional to three-dimensional mineral exploration under conditions of information asymmetry, minimizing uncertainties associated with exploration indicators to the greatest extent possible and significantly enhancing the credibility of mineral exploration predictions. It has provided a systematic methodological framework for mineral exploration in China’s prospecting areas, markedly elevating the country’s theoretical and methodological standards for large-scale mineral resource prediction. Moreover, it has closely integrated research in ore deposit geology and ore deposit geochemistry with mineral exploration activities. The research findings can be directly applied to mineral exploration efforts, effectively addressing the serious disconnect between industry, academia, and research institutions.
　　
　　According to a reporter from China Mining News, the Mineral Exploration Technology Guidance Center of the Ministry of Natural Resources has organized, in phases and batches across the country, lectures on case studies of “Theoretical and Methodological Approaches to Prospecting in Exploration Areas,” training sessions on technical methods, and the publication and promotion of specialized monographs, thereby comprehensively popularizing “Theoretical and Methodological Approaches to Prospecting in Exploration Areas.” To date, the center has held a total of 11 training sessions, training 1,619 person-times of various technical personnel and receiving positive feedback. Meanwhile, the published monograph, “Theoretical and Methodological Approaches to Prospecting in Exploration Areas (General Overview),” has already been distributed to over 16,000 copies among technical personnel engaged in frontline mineral exploration work.
　　
　　 Referencing and applying this approach can significantly enhance the success rate of mineral exploration predictions.
　　
　　“This achievement represents a comprehensive summary of China’s efforts over the past decade in exploring old mines and conducting deep-seated mineral exploration, and it carries profound guiding significance... It has reached an internationally advanced level overall and will provide theoretical and methodological support for the next phase of mineral exploration in prospecting areas... It will serve as a practical ‘reference book’ for mineral exploration in these areas.” At the achievement appraisal meeting, academician experts expressed great appreciation for this accomplishment.
　　
　　They unanimously agreed that this achievement has, for the first time, established a theoretical and methodological system for mineral exploration prediction in prospecting areas, centered on the study of ore-forming geological bodies, ore-forming structures and structural surfaces, characteristic indicators of ore-forming processes, and spatial model structures. This system effectively reduces the uncertainty associated with exploration indicators, significantly enhances the credibility of mineral exploration predictions, and achieves a close integration between ore deposit studies, ore deposit geochemical research, and mineral exploration. It provides a systematic methodological framework for promoting breakthroughs in mineral exploration within China’s comprehensively surveyed exploration areas.
　　
　　Second, this achievement proposes a method for constructing geological models for mineral exploration prediction in prospecting areas, enabling the deep integration of three key elements: ore-forming geological bodies, ore-forming structures and structural planes, and characteristic indicators of ore-forming processes. It also allows for a highly detailed three-dimensional characterization of mineralization patterns, demonstrating strong practical applicability.
　　
　　In addition, following the academic approach of the exploration target prediction theoretical framework for prospecting areas, we have, for the first time, systematically developed geological models for the exploration and prediction of 25 major ore deposit types in China, including sandstone-type uranium deposits, hydrothermal sedimentary lead-zinc deposits, stratabound lead-zinc deposits hosted in carbonate rocks, marine volcanic rock-type copper-lead-zinc deposits, continental volcanic rock-type iron deposits, continental volcanic-hydrothermal copper-gold polymetallic deposits, porphyry copper deposits, porphyry molybdenum deposits, contact-metasomatic iron-copper deposits, high-temperature magmatic-hydrothermal tungsten-tin deposits, and sedimentary-metamorphic iron deposits. These models hold significant guiding value for exploration target prediction in prospecting areas.
　　
　　In view of further enhancing the practicality of these findings, the academicians and experts recommend that, building on the series of monographs, a simplified, portable guidebook titled “Theory and Methods for Prospecting and Mineral Exploration in Exploration Areas” be developed to make it more convenient for field geologists to use.
　　
　　However, the authors—including Ye Tianzhu—point out that although this theoretical and methodological system for mineral exploration prediction applied to large-scale mineral prospecting in ore-concentrated areas can significantly increase the probability of successful mineral discovery, it still has certain limitations.
　　
　　“The results clearly show a strong bias toward deep-sea mineral exploration and the discovery of concealed ore deposits. There has been no comprehensive summary of the general exploration methods used in the preliminary and reconnaissance stages—methods that include basic geological mapping, verification of geophysical and geochemical anomalies, and other initial-stage tasks. In particular, there is no dedicated summary of the conceptual approaches and methodological frameworks for mineral exploration under conditions of incomplete or unclear information, nor of the specific application of geophysical and geochemical techniques. It is hoped that when referring to the methodologies proposed in specialized monographs, readers will make appropriate distinctions: these methods can serve as references, but they should not be simply copied or applied wholesale.” Thus reads the concluding remarks of the general introduction to “Theories and Methods for Mineral Exploration in Prospecting Areas.”
　　
　　In the view of the compilers, at the initial stage of mineral exploration in an exploration area, the primary focus should still be on geological mapping, macroscopic observation, and meticulous primary documentation, supplemented by experienced judgment as well as the rational selection and accurate application of geophysical and geochemical exploration methods. Moreover, the exploration engineering deployment must strictly adhere to the principles of proceeding from the known to the unknown, from sparse to dense, and from shallow to deep.