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Journal of Earth Science 2019年第5期30卷 996-1004页

作者： Li Yang wanming yuan Xiaoyong Zhu Zhen Shi Science Research Institute China University of Geosciences

The Sanjiang Tethys orogenic belt is located in the southeast side of the Qinghai-Tibet Plateau. It has undergone the opening and closing movements in different periods of Tethys oceans, complex accretive orogeny and strong mineralization from Paleozoic to Mesozoic. Using zircon fission track(ZFT) thermochronology, this study reveals the Sanjiang Tethys has experienced multi-stage tectonic activities during the Late Triassic–Cenozoic. The 15 ZFT ages with their decomposition components obtained from Sanjiang Tethysian region range from 212 to 19 Ma, which not only shows 6 age groups of 212, 179–172, 156–133, 121–96, 84–70 and 50–19 Ma, but also constrains the age limit of the tectonothermal events. These age groups recorded the Paleo-Tethys main and branches ocean opening/closure time. The age-elevation plot indicates the Sanjiang region had differential uplifting and exhumation and fast uplifting times of ca. 133, 116 and 80 Ma, coinciding with the age groups mentioned above. These results show new geochronological evidences and viewpoints.

关键词： tectonic events zircon fission track analysis tethys evolution Sanjiang region Qinghai-Tibet Plateau thermochronology

Apatite fission track dating evidence on the tectonization of Gangdese block, south Qinghai-Tibetan Plateau

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Chinese Science Bulletin 2002年第3期47卷 239-243页

作者： yuan wanming WANG Shicheng LI Shengrong YANG Zhiqiang Institute of High Energy Physics Chinese Acadeny of SciencesBeijing 100039China China University of Geosciences Beijing 100083China Exploration and Production Research Institute SINOPECBeijing100083China

This work makes the quantitative constrain on tectonizations of the Gangdese block, south Qinghai-Tibetan Plateau. Apatite fission track (AFT) dating analyses of 15 samples collected across the Gangdese block show that the Gangdese block went through two periods of tectonizations, during -37.2-18.5 Ma and 18.5 - 8.0 Ma in the south Gangdese block, and during -47.6-5.3 Ma and 5.3-0 Ma in the middle Gangdese block. Different upliftings did not take place in the first period and rapid uplifting occurred in the late period. Meantime, there are some differences be-tween the south and middle Gangdese block. Their uplifting rate is 180 m/Ma and 70 m/Ma respectively. The rapid up-lifting time in the middle Gangdese block lagged behind the time in the south Gangdese block. It is Chala-Jiacuo-Riduo fault zone that is similar to the Yarlung Zangbo fault zone in control of the tectonization.

关键词： tectonization fault zone fission track apatite uplifting and cooling Gangdese block.

Apatite fission track dating evidence for tectonic movement of Yarlung Zangbo Thrust Zone

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Chinese Science Bulletin 2002年第9期47卷 765-768页

作者： yuan wanming HOU Zengqian WANG Shicheng LI Shengrong Institute of High Energy Physics.Chinese Academy of Sciences Beijing 100080China Institute of Mineral Resources Chinese Academy of Geological SciencesBeijing 100037China China University of Geosciences Beijing 100083China

Fission track geological chronology is an effective method of study on tectonic movement of fault zone. Apatite fission track (AFT) dating analyses of 9-apatite and 4-zircon samples collected from Lhasa to Langkazi, -70-km-long in SN provide an understanding of the age and the uplifting of both sides of the Yarlung Zangbo Thrust Zone (YZTZ) in this work. The AFT ages range from-37 to 14 Ma, indicating the time of major tectono-thermal events, i.e. the continent-continent collision along the YZTZ. Based on the relationship between the AFT ages and the sample elevations, there were two tectonic active periods: -37-20 Ma and 20-14 Ma. In the first period the tectonic event did not bring on differential uplifting. Rapid differential uplifting with rapid cooling, resulting from thrusting, took place in the second period. The vertical displacement was -1020 m and total -2.9 km of overburden has been removed from the present-day surface since cooling below -110°C began. The maximum cooling and denudation

关键词： fission track dating thrusting thermal event uplifting Yarlung Zangbo Zone Tibet.

The uplifting and denudation of main Huangshan Mountains,Anhui Province,China

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Science China Earth Sciences 2011年第10期54卷 1168-1176页

作者： yuan wanming YANG ZhiQiang ZHANG ZhaoChong DENG Jun State Key Laboratory of Geological Processes and Mineral Resources China University ofGeosciences Beijing 100083 China Exploration and Production Research Institute China Petroleum & Chemical Corporation Beijing 100083 China

The Huangshan Mountain Geopark is an important geological landmark and tourist *** this paper,we apply fission track dating to examine the uplift and exhumation processes that created the Huangshan Mountains and provide a timeline for their *** addition to being an important scientific contribution,this information can be used on guided tours and to promote *** results of eight apatite fission-track analyses suggest three age groups:56,45-30,and 15 *** age groups are related to the uplifting-erosion processes involved in forming ancient multilevel denudation planes at 85-50,45-30,and 24-5 Ma,*** scenic area has experienced three stages of thermal *** first stage occurred before 80 Ma and the third stage after 13 *** three stages had varying cooling rates:2.69,0.62,and 4.23°C/Ma,*** rates also varied:0.08,0.02,and 0.12 mm/*** uplifting ranges were also variable:1.14,1.57,and 4.00 km,*** uplifting differences between diverse areas are obvious and there were four magnitudes of cumulative uplifting range:4060-3950,3760-3490,3190-3070,and 2650 *** surface uplifting range varied from 450 to 2230 *** and uplifting amount averaged 2340 and 3400 m,*** 1060 m difference between them is the average elevation at present.

关键词： uplifting denudation geological thermal history fission track thermochronology apatite Huangshan Mountains

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Exhumation history of the Huangshan granite pluton,southern Anhui Province:New insights from fission-track analysis

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Science China Earth Sciences 2011年第4期54卷 528-539页

作者： ZHENG Yong YU XinQi yuan wanming WANG De'En JIANG GongBing ZHU DeLai WANG Cheng JIA YingYing State Key Laboratory of Geological Processes and Mineral Resources China University ofGeosciences Beijing 100083 China Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China 332 Geological Team of Anhui Bureau of Geology and Mineral Resources Huangshan 245000 China World Heritage offices Huangshan Management Council Huangshan 245800 China

The dating of the uplift onset of the Huangshan pluton in the southern part of Anhui Province associated with the collision between paleo-Pacific Block and the Eurasian Block is a fundamental issue to better understand the uplift mechanisms and the regional tectonic evolution. Х^2 values of seven zircon fission track （ZFF） samples collected from the south part of the Huangshan pluton were all 〈5%. Based on the grain ages of four typical ZFr samples, three thermal overprints ranging in 113-123, 72-95 and 49-66 Ma were distinguished respectively using the binomial peak-fitting method in accordance with the tectonic thermal events after south China shifted into circum-Pacific tectonic region. Apatite fission track （AFT） study of the Huangshan pluton shows ages lie between 15±3 and 56±6 Ma with all Х^2 values 〉5%, and all are significantly younger than their host rock formation ages, indicating that the samples have experienced post-formation thermal history. Based on the AFT resuits and topography characteristics in the Huangshan pluton, three zones with different denudation intensities caused by the differential uplift of the fault blocks were recognized in this paper, indicating that denudation was driven by the increase in elevation significantly. Modeling of the AFT data shows that the earlier cooling phase took place in the early Cenozoic and involved 3.3, 3.8 and 6.0℃/Ma of cooling rates equivalent to the exhumation rates of 90, 104 and 167 m/Ma in different fault blocks. The last phase of cooling took place from -10 Ma with average cooling rate of -5.6℃/Ma, equivalent to average denudation rates of -156 m/Ma. The fission track results imply that the regional compression field plays an important role for the differential exhumation between individual fault blocks of the Huangshan pluton.

关键词： Huangshan pluton thermal overprints apatite fission track cooling fault block

The Structure of Ore-controlling Strain and Stress Fields in the Shangzhuang Gold Deposit in Shandong Province,China

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Acta Geologica Sinica(English Edition) 2008年第4期82卷 769-780页

作者： DENG Jun WANG Qingfei YANG Liqiang ZHOU Lei GONG Qingjie yuan wanming XU Hao GUO Chunying LIU Xiangwei State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Beijing 100083 Key Laboratory of Lithosphere Tectonics and Lithoprobing Technology of Ministry of Education China University of Geosciences Beijing 100083

The Shangzhuang altered-rock type gold ore deposit is located in the middle segment of and controlled by the Wang＇ershan fault zone in the northwestern part of the Jiaodong gold province, China. The deformation evolution, the structure of strain and stress fields and its ore-controlling effect in the Shangzhuang deposit are discussed in this paper. It is revealed that the deformation evolution has mainly undergone four phases： the early ductile deformation, the second NE-striking horizontal simple shear, the third NE-striking compression-shear and the final NW-striking compression. The mineralization happened during the third stage in which the maximum principal stress gradually transited from NE to NW. The 3-D numerical simulations of the stress field show that, on the condition that the maximum principal stress is NE-striking, the fracture development in the fault zone is favored, while when the maximum principal stress is NW-striking, the fault zone is relatively extensional and it is suitable for the influx and emplacement of ore-forming fluids. The compression-shear strain field during the mineralization is characterized by the λ-type structure, the positive flower structure, etc. Orebodies are mostly equidistantly located in the dilatational spaces, which are distributed in the integral compressional circumstances. And the dilatational spaces are developed where the fault attitude changes or shear joint systems develop. In the overall compression-shear stress field, the strain field bears self-similarity at multiple scales, including the orebody, ore deposit and orefield. The selfsimilarity of the structure comprises the subequidistant distribution of fractures at the same scale and the similar shape of the fractures at various scales. Yet, due to the special geological structure, the orebodies are mostly located in the hanging wall in the Shangzhuang deposit, which is different from most deposits in the Jiaodong gold province. Analyses of the ore-controlling

关键词： Shangzhuang gold deposit 3-D structural stress field altered rock

Control of Melt Structures on Cu-Au Mineralization in Basic-Ultrabasic Complexes of Northern China

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Acta Geologica Sinica(English Edition) 2000年第4期74卷 786-794页

作者： yuan wanming Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100080and MO Xuanxue China University of Geoscienses, Beijing 100083 Chinese Acad Sci Inst High Energy Phys Beijing 100080 Peoples R China China Univ Geosci Beijing 100083 Peoples R China

Based on systematic analyses of 72 samples of different basic-ultrabasic rocks, the present paper discusses the relationship between melt structure and Cu and Au mineralization. It is found that if the NBO/T, NBO, M2+, FeO and MgO values are relatively high and the T, M3+, Fe2O3 and CaO values are low the basic-ultrabasic melt will be favourable to Cu (Ni) mineralization, but if the former are low and the latter are high it is favourable to Au metallization. Cu ions occupy dominantly octahedra in basic-ultrabasic melt and the higher the NBO/T, NBO and M2+ values, the more the octahedra in the melt. Au element mainly takes the form of Au+ ions in basic-ultrabasic melt and the Au+ ions constitute tetrahedral sites together with Fe3+ ions. Therefore, low M2+ and high Fe3+, i.e. high oxygen fu-gacity, can promote the enrichment of Au+ ions and Au mineralization. Components NT (other than Au+), Al2O3 and SiO2 in basic-ultrabasic melt have no effect on metallogenetic species. As mentioned above, in relevant diagrams distribution areas of the characteristic values of ore-free melt and those of ore-forming melt are overlapped in different degrees, which possibly indicates that not all the magmas have mineralizing ability. It can be well distinguished whether basic-ultrabasic rocks are favourable to Cu or Au mineralization or they are just ore-free rocks by analysing integrated diagrams of the characteristic values of the magmatic melt structure.

关键词： melt structure Cu-Au mineralization basic-ultrabasic complex

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矿床保存变化研究的热年代学技术方法

岩石学报 2016年第8期32卷 2571-2578页

作者：袁万明中国地质大学科学研究院北京100083

成矿后矿床的保存与变化是矿床地质研究的重要组成部分,但研究程度不高,至今仍属于薄弱环节。矿床的保存与其隆升剥露密切相关,深入细致研究恢复矿区矿床的隆升和剥露历史,是揭示矿床保存变化的一种重要途径。本文重点论述研究矿床保存... 详细信息

成矿后矿床的保存与变化是矿床地质研究的重要组成部分,但研究程度不高,至今仍属于薄弱环节。矿床的保存与其隆升剥露密切相关,深入细致研究恢复矿区矿床的隆升和剥露历史,是揭示矿床保存变化的一种重要途径。本文重点论述研究矿床保存变化的技术方法,通过综合应用裂变径迹、(U-Th)/He、^(40)Ar-^(39)Ar年代学以及La-ICP-MS、锆石U-Pb定年等多种技术手段,研究成矿期次、构造活动期次以及二者间的联系,定量计算不同矿区、不同矿体、不同部位、不同时间的冷却隆升速率、隆升幅度、剥蚀速率和剥蚀量,探讨矿床保存深度与剥蚀量间的关系,总结不同时代、不同矿区矿床保存-变化过程,建立新的矿床地质-保存环境模型,完善矿床预测的综合示踪标志,最终预测不同矿区、不同地段隐伏矿床可能的产出深度,给出矿床可能已经被剥蚀殆尽的区段或地段,为深部找矿和区域成矿潜力评价提供依据。本文可为地质工作者的相关应用提供借鉴和手段。

关键词：矿床保存变化裂变径迹热年代学隆升剥露定量计算技术方法

Petrogenesis of granitic pegmatite veins:Perspectives from major element and B isotope in tourmalines,Chakabeishan,Northern Tibetan Plateau

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Geoscience Frontiers 2023年第5期14卷 267-279页

作者： Wenli Sun Zhidan Zhao Yaoling Niu Chunjing Wei Guochen Dong Xiaowei Li wanming yuan Tao Wang Bingzhang Wang Tong Pan Jie Han Hongliang Cao Yan Tang Dicheng Zhu State Key Laboratory of Geological Processes and Mineral Resources and School of Earth Science and ResourcesChina University of GeosciencesBeijing 100083China MOE Key Laboratory of Orogenic Belts and Crustal Evolution School of Earth and Space SciencesPeking UniversityBeijing 100871China Gansu Industry Polytechnic College Tianshui 741025China Laoshan Laboratory Qingdao 266237China Bureau of Geological Exploration and Development of Qinghai Province Xining 810012China

The petrogenesis of regionally zoned granitic pegmatite veins remains *** of the economic significance,we carried out a study on the Chakabeishan(CKBS)pegmatite-type Li-Be deposit,eastern North Qaidam Tectonic Belt,Northern Tibetan Plateau,by means of in-situ major element and B isotope compositions of tourmalines in the beryl-bearing and spodumene-bearing pegmatite ***(Tur-Be)from the beryl-bearing pegmatite are homogeneous schorl with low Mg/(Mg+Fe),high Na/(Na+Ca)and Y Al,suggesting that they are of magmatic *** generations of tourmalines(TurLi)from the spodumene-bearing pegmatite are identified:(i)the crystal cores(mostly elbaite and Lirich schorl with subordinate schorl)are consistent with being of magmatic origin crystallized at the magmatic stage;(ii)the crystal rims(schorl)are best understood as the overgrowth at the later hydrothermal ***-Be and Tur-Li show an obvious difference in core-to-rim B isotopic variation trend with d11B decrease in Tur-Be and increase in *** core-to-rim d11B decrease in Tur-Be results from degassing during its host pegmatitic melt evolution,whereas the core-to-rim d11B increase in Tur-Li is related to fluid *** estimated d11B values for the initial melts of the beryl-bearing and spodumenebearing pegmatites are10.46‰and10.78‰,respectively,indicating that they most likely originate from protracted fractional crystallization/differentiation of granitic intrusions rather than partial melting of *** Mg/(Mg+Fe)ratios and Li abundances in the cores of Tur-Be are lower than those of Tur-Li,suggesting that Tur-Li crystallizes from chemically more evolved melts.

关键词： Petrogenesis Pegmatite Tourmaline Boron isotope Major element

热年代学方法、技术手段及其在矿床地质中的研究进展

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地球科学 2018年第6期43卷 1887-1902页

作者：杨莉袁万明王珂中国地质大学科学研究院北京100083

同位素地质年代学是一门传统的定年学科,广泛应用于地质各个领域研究中.随着同位素地质年代学理论创新与技术进步,现在逐步发展成为地质热年代学,即将地质年代数据赋予相应封闭温度属性,使之不仅揭示地质事件年龄,而且反映该事件发生的... 详细信息

同位素地质年代学是一门传统的定年学科,广泛应用于地质各个领域研究中.随着同位素地质年代学理论创新与技术进步,现在逐步发展成为地质热年代学,即将地质年代数据赋予相应封闭温度属性,使之不仅揭示地质事件年龄,而且反映该事件发生的温度条件.不同定年方法以及测试样品的不同,其对应的封闭温度不同,从而可以揭示地质体在更大温度或年龄范围的形成演化过程,定量研究矿区或矿体的隆升与剥露,评价矿床形成后的保存与变化状况,提高找矿预测效果.主要总结和论述诸如40 Ar-39 Ar、裂变径迹和(U-Th)/He等中-低温热年代学技术方法及其在矿床地质中的应用研究状况,分析热年代学技术与应用发展趋势,以期为成矿作用研究提供新的应用技术手段.

关键词：地质热年代学测试技术定年方法矿床