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成矿后含矿地质体的剥露程度与矿体的保存关系是矿床学研究的疑难问题之一.利用中酸性侵入岩体的出露程度,结合磷灰石裂变径迹测试结果及现今发现的矿产展布特征,探讨天山山脉剥露程度与内生金属矿产保存之间的关系,进而为区域找矿提供理论指导.统计结果表明,北天山西段的依连哈比尕尔山、中段的博格达山和西南天山山脉皆缺乏大面积分布的深成侵入岩,已经发现的内生金属矿产较少,且以中低温的矿床为主;北天山南部的觉罗塔格地区、中天山和南天山东段都大面积出露中酸性岩体,已经发现了大量大型-超大型规模内生金属矿床,以中高温成矿为特征;综合分析已有的磷灰石裂变径迹测年结果统计显示,北天山西段的依连哈比尕山、中段的博格达山和西南天山中生代晚期开始隆升,新生代25Ma以来隆升强烈;北天山南部、中天山以及南天山东段山脉从侏罗纪早期就已经开始隆升而接受剥蚀,新生代隆升较弱.结合现今山脉的地质背景、内生金属矿产展布特征、山脉隆升时间及其现今地貌特征推测,北天山西段的依连哈比尕山、中段的博格达山和西南天山山脉由于剥蚀时间短,因而其剥蚀程度相对较低,地表仍出露表壳的沉积-火山岩系,以中酸性侵入岩体为代表的深成岩体由于剥蚀量不够而还没有出露于地表,地表出露低温的内生金属矿产;北天山南部、中天山以及南天山东段山脉开始隆升时间早,新生代隆升弱,因而总体上剥蚀量、剥蚀程度大,表壳岩系已经剥蚀殆尽,广泛出露深成侵入岩体,与中酸性岩体侵位有关的中高温矿产广泛展布.为此,进一步指出了在天山山脉不同构造分区内应该着重寻找不同类型、不同成矿温度的内生金属矿产,推测西南天山具有较好的找矿远景空间,并认为山体剥露程度的差异是造成所谓“大矿不过国界”的主要原因之一.
The relation between the degree of detritus and the preservation of the ore body after ore-forming is one of the most difficult problems in the study of deposit.According to the degree of exposure to intermediate-acid intrusion rock mass, combined with the apatite fission track test results and the present findings Mineral distribution characteristics of Tianshan Mountains to discuss the degree of exposure and the relationship between the endogenous metal mineral preservation, and thus provide theoretical guidance for prospecting in the region.The statistical results show that the northern part of North Tianshan Mountains, Of the Bogda Mountains and the southwestern Tianshan Mountains are lack of large-area deep plutonic intrusions, few endogeneous metallic minerals have been found, and the ore deposits are mainly low and medium temperature. In the Jueluotage area in the southern North Tianshan Mountains, A large number of large-scale large-scale endogenous metallogenic deposits have been discovered in large areas of Tianshan and eastern Tianshan Mountains, characterized by high-temperature metallogenetic mineralization. A comprehensive analysis of apatite fission track dating The results show that in the western section of North Tianshan Mountains, Erhabeiga Mountain in the middle part, Bogda Mountain in the middle part and Tianshan Mountain in Southwest China began to uplift in the late Mesozoic, which has been strongly uplifted since the Cenozoic 25 Ma. In the northern part of the northern Tianshan Mountains, the middle Tianshan Mountains and the eastern section of the southern Tianshan Mountains In the early Jurassic, the uplifted and receded eclipses have started to erode and the uplifted uplift of the Cenozoic is weaker.Based on the geological background of present-day mountains, the distribution characteristics of endogenous metallogenic minerals, the uplift time of the mountains and their current geomorphological features, Of Erh-ha-Ga mountain, the middle Bogut Mountains and the southwestern Tianshan Mountains have a relatively low degree of denudation due to their short denudation time, and the surface is still exposed by the deposition of the shell-volcanic series. The representative deep plutons have not been exposed to the earth’s surface due to insufficient denudation, and the surface shows low-temperature endogenous metallogenic minerals. The uplift of the northern Tianshan Mountains and the eastern Tianshan Mountains and the eastern Tianshan Mountains started to rise earlier and the Cenozoic anorthostenes became weaker, thus In general, the amount of denudation and denudation are large, and the crustal facies series have been denuded and extensively exposed, and the intermediate and high temperature minerals related to the emplacement of intermediate-acid rock mass have been extensively distributed.Therefore, Tianshan Mountains in different tectonic zoning should focus on finding different types and different metallogenic temperature of endogenous metallogenic minerals, suggesting that the Southwest Tianshan has a better prospecting prospect space, and that the difference in the degree of mountain peel is made One of the main reasons for the so-called “big mine but national boundaries”.