(1. 昆明理工大学 国土资源工程学院，昆明 650093；
2. 中国科学院地球化学研究所 矿床地球化学国家重点实验室，贵阳 550002；
3. 中国有色金属工业昆明勘察设计研究院有限公司，昆明 650051；
4. 云南迪庆矿业开发有限责任公司，香格里拉 674400)
摘 要: 羊拉铜矿床是我国西南“三江”多金属成矿域内矽卡岩-斑岩型矿床的典型代表，为滇西北金沙江缝合带中生代构造-岩浆-成矿事件的产物。该矿床构造发育，形成了一套褶皱-断层控岩控矿体系。本文运用矿田地质力学方法对羊拉铜矿床构造形迹的几何学、运动学和力学性质进行解析，建立羊拉铜矿床的构造体系及其控岩控矿模式。结果表明：自海西期→印支期→燕山期→喜马拉雅期，羊拉铜矿床主压应力经历了东西向→北西向→北西向→(北东向→近东西向)的转变，依次形成了早南北构造带、北东构造带(早-晚)、(北西构造带和晚南北构造带)。早南北构造带为羊拉铜矿床控岩控矿构造的基础，早北东构造带为控制矽卡岩-斑岩成矿系统的主导构造，晚北东构造带、北西构造带和晚南北构造带为破岩破矿构造。根据构造体系及其控岩控矿作用，认为羊拉铜矿床构造控岩控矿模式为海西期“层间断裂”＋印支期“侵入接触构造”＋燕山期“λ字型构造”＋喜马拉雅期“阶梯状构造”。
关键字: 构造体系；控岩控矿构造；构造控矿模式；羊拉铜矿床；滇西北
（1. Faculty of Land and Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China;
2. State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;
3. Kunming Prospecting Design Institute of China Nonferrous Metals Industry Co., Ltd., Kunming 650051, China;
4. Yunnan Diqin Mining Industry Group, Shangrila 674400, China）
Abstract:The Yangla Cu deposit is located in northwest Yunnan, China and formed during the Mesozoic structure-magma-mineralization events, is one of the typical skarn-porphyry deposits in the Jinshajiang suture zone, “Sanjiang” polymetallic metallogenic domain. Well developed structures in the Yangla Cu deposit composed a typical folds-faults rock- and ore-controlling structural system, which constituted the skarn-porphyry metallogenic system. In this paper, the theory and method of ore-field geomechanics are used to analyze the geometry, kinematics and mechanical property of the structure traces in the Yangla Cu deposit, and to determine the ore-field structural system and its mechanism of rock-and ore-controlling model. The results show that the Yangla Cu deposit mainly experienced transformation of main constructional compressive stress from EW- to NW- to NW- to (NE- to nearly EW) trending, and formed the early NS, NE (early to late), NW, late NS structure belts in turn, since the Hercynian→Indochina→Yanshanian→Himalaya, and affected the Jianshajiang suture zone and Indian-Eurasian plates. It is believed that the early NS structure belt was the rock- and ore-controlling structural framework system in the Hercynian. The early NE structure belt was provided a favorable structural setting for the skarn-porphyry metallogenic system, which was the dominant ore-controlling structural system in the Indochina. In contrast, the late NE structure belt destroyed the rock and ore-bodies, which belong to rock- and ore-breaking structure in Yanshanian. The NW and late NS structure belts also destroyed the intrusions and ore-bodies, and belong to the rock- and ore-breaking structure in Himalaya. The corresponding structure rock- and ore-controlling model are successively the “Interlayer Faults” of the Hercynian, “Intrusion into Contact Faults” of the Indochina, “λ-Type Faults” of the Yanshanian, and “Stair-Step Faults” of the Himalaya, which based on the structural system and its rock- and ore-controlling structure type.
Key words: structural system; rock- and ore-controlling structure; ore-controlling structure model; Yangla Cu deposit; Northwest Yunnan
