摘要
运用证据权法，根据东北太平洋Clarion—Clipperton地区（简称CC区）的海底断裂构造、海底沉积物类型、初级生物生产力、水深等主要控矿地质证据资料，对该地区潜在多金属结核资源进行了预测。地质证据与多金属结核矿床的空间相关性研究表明，控制多金属结核的地质证据依次为：海底沉积物类型、初级生物生产力、海底断裂构造和水深。预测结果表明，已发现的多金属结核矿床分布的后验概率区间为0．29—0．73，说明证据权法在大洋多金属结核潜在资源预测中具有良好的应用效果。多金属结核矿床形成的有利后验概率区间表明，在研究区的西南部和南部存在寻找多金属结核资源的潜力地段。
In this paper the potential polymetallic nodule resources in the Clarion-Clipperton Fracture Zone （CCZ） are predicted using the Weights of Evidence Modeling on the basis of major ore-controlling geological evidences in- cluding seabed faults, sediment types, primary biological productivity and water depth. The spatial correlations between geological evidences and discovered nodules show that the sequence of the weights of ore-controlling geological evidences is as follows： sediment types, primary biological productivity, seabed faults and water depth. The prediction results show that the interval of posterior probabilities of mineralization for the discovered nodules is 0.29 0.73, which illuminates that the Weights of Evidence Modeling method is effective for the prediction of potential oceanic polymetallic nodule resources. The distribution of posterior probabilities for mineralization favorability shows that the south and southwest areas of the CCZ are the potential areas for exploring nodules in the future.
出处
《大地构造与成矿学》
EI
CAS
CSCD
北大核心
2008年第3期352-359,共8页
Geotectonica et Metallogenia
基金
受中国大洋协会国际海底“十五”大洋专项课题“基于CC区的多金属结核地质模型”(DY105-01-02-02)
国家自然科学基金项目“东北热带太平洋近表层沉积物的生物扰动作用研究”(40406010)
中国科学院边缘海地质重点实验室和广州地球化学研究所项目(MSGL04-9)的联合资助
