Comparison of the Typical Metallogenic Systems in the North Slope of the Tongbai-East Qinling Mountains and its Geologic Implications

The Tongbai-East Qinling Mountains, an important part of the Central orogenic belt, is one of the most important metallogenic belts in China and contains lots of orogenic-type and VMS-type （Volcanogenic Massive Sulfide type） metallogenic systems. The Dahe and Shuidongling VMS-type Cu-Zn deposits, located in the Erlangping Group in Tongbai and East Qinling Mountains, respectively, show similar geological and geochemical features. The Huoshenmiao Formation in the East Qinling region and the Liushanyan Formation in the Tongbai region are spilite-keratophyre sequences occurring in the western and eastern sides of the Nanyang Basin, respectively, and are interpreted to be equivalent to each other. The orogenic-type Au-Ag deposits can be subdivided into two styles; namely, fault- or structure-controlled （e.g. Yindonggou） and stratabound （e.g. Poshan）. The Poshan and Yindongpo orogenic-type Au-Ag deposits, whose ore bodies are strictly hosted in carbonaceous strata in the Tongbai Mountains, show obvious stratabound characteristics. Their ore-fluids are enriched in K^＋ and SO^2-4 and are regarded as K^＋-SO^2-4 types. The Pb-isotope ratios of sulfides of the ores are extremely uniform and significantly different from those of the tectonostratigraphic terranes of the Qinling orogens except for the ore-hosting strata of the Waitoushan Formation. The Yindonggou and Xuyaogou orogenic Au-Ag deposits in the East Qinling Mountains, whose ore bodies are hosted in the faults cutting the hosting strata or granite body, show fault-controlled characteristics. Their ore-fluids belong to the Na^＋-Cl^- type. The Pb-isotope ratios of sulfides of ores are similar to those of the northern Qinling orogenic belt. The Waitoushan Formation, dominated by carbonaceous sericite-rich schists and only occurring in Tongbai region, should be detached from the Erlangping Group, which occurs both in the western and eastern sides of the Nanyang Basin. Future ore exploration in the Tongbai-East Qinling Mountains should focus on fault-controlled Au-Ag lodes.

The value of vegetation ecosystem services:a case of Qinling-Daba Mountains

According to differences in vegetation types and their coverage, combining the latest research, using theory and method on the value of vegetation ecosystem services, this paper not only calculated goods produced by different types of vegetation but also estimated the value of various vegetation ecosystem services and set up database, GIS and eco-account of vegetation ecosystem. The result was as follows: the value of vegetation's primary productivity, soil and fertility conservation, water conservation, CO 2 fixation and O 2 release was 199.6 billion yuan/a, 22.64 billion yuan/a, 22.66 billion yuan/a, 352.24 billion yuan/a and 374.19 billion yuan/a, respectively. The total value of ecosystem services was 968.33 billion yuan/a. The temperate deciduous broad-leaved forest had the highest contribution rate, accounting for 16.42%. The result of value can reflect regional reality more exactly.

Study on Dominant Expression of Regional Culture of the Qinling Mountains in Local Residential Buildings

Regional culture of the Qinling Mountains shows distinct features since it was born in the local outstanding ecological environment, study on local architecture is significant for the dominant expression of regional culture, protection of local environment, and echoing with the theme of ecological civilization construction. This paper, on the basis of the mutual infl uence and evolution of regional culture and style of local residential buildings, explored the reasons for the weakening of local architectural style, and specified the signifi cance of promoting local style of the living environment. By studying the infl uence of local natural environment and humanistic environment on architectural style along the northern foot of the Qinling Mountains, the paper explored the expression of regional culture in residential buildings, with Xian Garden(Xi'an Yuanzi) as an example, and aimed at giving useful help to the dominant expression of regional culture in modern residential buildings.

Drought fluctuations based on dendrochronology since 1786 for the Lenglongling Mountains at the northwestern fringe of the East Asian summer monsoon region

The Lenglongling Mountains （LLM） located in northeastern part of the Tibet Plateau, belong to a marginal area of the East Asian summer monsoon （EASM） and are sensitive to monsoon dynamics. Two tree-ring width chronologies developed from six sites of Picea crassifolia in the LLM were employed to study the regional drought variability. Correlation and temporal correlation analyses showed that relationships between the two chronologies and self-calibrated Palmer Drought Severity Index （sc_PDSI） were significant and stable across time, demonstrating the strength of sc_PDSI in modeling drought conditions in this region. Based on the relationships, the mean sc_PDSI was reconstructed for the period from 1786 to 2013. Dry conditions prevailed during 1817-1819, 1829-1831, 1928-1931 and 1999-2001. Relatively wet periods were identified for 1792-1795 and 1954-1956. Spatial correlations with other fourteen precipitation/drought reconstructed series in previous studies revealed that in arid regions of Northwest China, long-term variability of moisture conditions was synchronous before the 1950s at a decadal scale （1791-1954）. In northwestern margin of the EASM, most of all selected reconstructions had better consistency in low-frequency variation, especially during dry periods, indicating similar regional moisture variations and analogous modes of climate forcing on tree growth in the region.

Geotectonic Subdivision and Paleozoic Subduction and Collision Orogeny of East Qinling and Its Adjacent Regions:Evidence from Geochemical Research

The regional lithospheric chemical heterogeneity in-ers that the East Qinling and its adjacent cratonic re-ions , as suggested by some authors , belong to two eotectonic units,the North China subdomain including he North China Craton and its southern continental largin (the North Qinling Belt), and the Yangtzean ubdomain comprising the Yangtze Craton and its torthern continental margin (the South Qinh'ng Belt). In the North Qinling Belt the metamorphosed olcanic rocks and graywackes of the Early Paleozoic Oanfeng Group south of the Early Proterozoic Qinling Froup show geochemical characteristics resembling hose of the arc volcanics and arc graywackes -espectively. The Early Paleozoic granites intruding in he Qinling Group also show similar geochemical features and similar compositional polarities to the arc-type granites . The Erlangping Group north of the Qinling Group is a volcanic-sedimentary sequence produced in an Early Paleozoic back - arc basin based on geochemical evidence . It is therefore believed that the North Qinling Belt comprised the active continental margin of the North China Craton , beneath which the ancient Qinling oceanic plate underthrusted and was consumed from 480 to 380Ma ago . The South Qinling Belt is generally considered to be a passive continental margin of the Yangtze Craton on which developed the thick Sinian and Paleozoic sediments of continental shelf and continental slope fades . The source of fine -grained clastic sedimentary rocks of various geological periods has been geochemically studied.The result demonstrates that the terrigenous elastics of the South Qinling Belt came only from the Yangtze Craton prior to the Silurian , and since then began to be fed by both the Yangtze Craton and the North Qinling . The Devonian sediments display a clear two - component mixing model in their source material . The change in the source materi-al strongly suggests that the Yangtze passive continental margin approached the active continental margin of the North China Craton and finally came into contact with it during the Silurian and the Early Devonian . On both sides of the Shangdan Fault Zone , the lithospheric megasuture of the Qinh'ng orogen , are distributed the Late Paleozoic (323-262 Ma ) granites which intruded in the Danfeng Group and the Qinling Group to the north , and in the Devonian strata to the south of the suture . The older granites of that time interval are comparable in geological and geochemical characteristics to the syn - collision granites from other continent-continent collision zones . The younger calc - alkaline granites which were em placed at about 260 Ma ago have been classified as the late - collision granites by various geochemical discrimination methods . On these grounds it may be deduced that the continent - continent collision orogeny did not begin to act until the late Early Carboniferous epoch and that its main episode was the Late Paleozoic , although it might have continued to the Early Mesozoic .The collision orogeny was separated from the subduction orogeny by an interval of about 60 Ma and the subduction of the oceanic crust was accompanied by the northward shifting of the Yangtze Craton and its passive continental margin . However , the ocean basin still remained in the South Qinling Belt for a long time after the disappearance of the ocean .

Late Mesozoic magmatism in the East Qinling Orogen, China and its tectonic implications

The Qinling Orogen in Central China records the history of a complex geological evolution and tectonic transition from compression to extension during the Late Mesozoic,with concomitant voluminous granitoids formation.In this study,we present results from petrological,geochemical,zircon U-Pb-Lu-Hf isotopic studies on the Lengshui felsic dykes from Luanchuan region in the East Qinling Orogen.We also compile published geochronological,geochemical,and Hf isotopic data from Luanchuan region and present zircon Hf isotopic contour maps.The newly obtained age data yield two group of ages at w145 Ma and 140 Ma for two granite porphyries from the Lengshui felsic dykes,with the w145 Ma interpreted as response to the peak of magmatism in the region,and the w140 Ma as the timing of formation of the felsic dykes.The corresponding Hf isotopic data of the granite porphyries display negative εHf(t) values of e16.67 to e4.61,and Hf crustal model ages (TDM^C) of 2255e1490 Ma,indicating magma sourced from the melting of Paleo- to Mesoproterozoic crustal materials.The compiled age data display two major magmatic pulses at 160e130 Ma and 111e108 Ma with magmatic quiescence in between,and the zircon Hf isotopic data display εHf(t) values ranging from e41.9 to 2.1 and TDM^C values of 3387e1033 Ma,suggesting mixed crustal and mantle-derived components in the magma source,and correspond to multiple tectonic events during the Late Mesozoic.The Luanchuan granitoids are identified as I-type granites and most of these are highly fractionated granites,involving magma mixing and mingling and crystal fractionation.The tectonic setting in the region transformed from the Late Jurassic syn-collision setting to Early Cretaceous within-plate setting,with EeW extension in the Early Cretaceous.This extension is correlated with the NeS trending post-collisional extension between the North China Craton and Yangtze Craton as well as the EeW trending back-arc extension triggered by the westward Paleo-Pacific Plate subduction,eventually leading to lithospheric thinning,asthenospheric upwelling,mafic magma underplating,and crustal melting in the East Qinling Orogen.

Age, Mechanism and Direction of East Qinling-Dabieshan Lithosphere Delamination Petrological Evidence and Stipulation

Through studies of P\|T\|t paths and decompressive retrograde metamorphic textures of metamorphic rocks in the East Qinling\|Dabieshan region, the authors determined the Mesozoic crust rapid uplifting age, and then inferred that in the East Qinling\|Dabieshan region lithosphere delamination occurred from T\-3 to J\-1. The Yanshanian granites produced by delamination are developed well in the East Qinling\|Dabieshan region. But due to the Gondwana plate effect, magmatism in the region caused by delamination lagged until J\-3 when the northern Tibet terrane and the Eurasian plate completely amalgamated. Additionally, due to western Pacific plate subducting underneath the Eurasian plate, in the East Qinling\|Dabieshan region the stress state was transformed from compression to extension. So in the region from J\-3 to K\-2 magmatism was most intensive, and liberalization was also relatively strong. Geophysical data reflect that in the East Qinling\|Dabieshan region the asthenosphere rose to the shallow level, the Moho is flat with no mountain root, and the crustal thickness is less than 40 km on average. These features agree with those of collisional orogenes in which delamination has occurred. Through contrasting differences in surface and interior depth between east and west Qinling we believe that delamination proceeded from east to west.

Tracing environmental lead sources on the Ao mountain of China using lead isotopic composition and biomonitoring

Atmospheric lead （Pb） and other trace metals can transport over long distance and deposit on remote alpine ecosystems. In this work, the soil profiles, litter and dominant mosses along a large altitude were collected on Ao Mountain, Central China, to obtain the spatial distributions of Pb in these materials, decipher the possible factors controlling the distribution, and quantitatively distinguish the natural versus anthropogenic sources of Pb through the Pb isotopic tracing and biomonitoring. The results show that soil Pb concentrations （mg/kg） decreased significantly with depth, and they were markedly higher in the 0 （42.6 ＋ 2.7） and A （36.4 ＋ 2.2） horizons than in the litter （7.20 ~ 1.9） and mosses （28.o ~ 3-9）- The Pb enrichment in the surface soils （0 and A horizons）, litter and mosses existed in the relatively high altitudes, which was attributed to the influences from atmospheric wet deposition, plants, soil Dhvsicochemical DroDerties and human activitv. ThePb isotopic ratios identified the Pb sources as originating mainly from Chinese coal combustion, mining and smelting. Atmospheric Pb from southeastern, southwestern and northwestern regions could be deposited in the alpine ecosystem by long distance atmospheric transport. The anthropogenic Pb reached over 50% in the 0 and A horizons, and over 70% in the litter and mosses, which corresponded to the concentrations of 26.9, 17.7, 5.92 and 21.2 mg/kg, respectively. The results indicate that the mutual effects of climate and regional human activity could increase the Pb accumulation in remote alpine ecosystems.

Formation and metamorphic evolution of the Douling Complex from the East Qinling Mountains

The Douling Complex occurs as a Precambrian tectonic block distributed between the North China and Yangtze plates and has a protracted evolutional history. It is composed of various metamorpnic intrusives and supracrustal rocks. According to the studies on geology and geochronology, it can be concluded that the complex may have been formed in the early Proterozoic, about 2000 Ma ago and experienced two phases of regional metamorphism during the Jinningian and late Caledonian-early Hercynian. It can be correlated with the Qinling Complex from the North Qinling Mountains in lithic assemblage, formation age, tectonic setting and metamorphism, and is probably a thrust nappe split from the Qinling Complex.

PRELIMINARY STUDY OF GEOLOGY AND GEOMORPHOLOGY OF LUONAN BASIN

Luonan Basin, formed during Neo\|tectonic movements, is one of the small block basins in East Qinling Mountain. Three faults, Tieluzi Fault, Dajing\|Guojiayuan Fault and Beisi Fault bound it. The west part of the basin is higher than the east part. The elevation, usually more than 1100meters in the west, decreases gradually to less than 800meters in the east. The Cenozoic deposit in Luonan Basin is thin in the west part and becomes increasingly thick towards the east part. The total thickness of both the Eogene and the Neogene is only more than 100meters at Dajing. At Duishan, a place close to Luonan county town, it is about 400meters, and at Gucheng, it becomes nearly 1750meters. The strata crop out in the west part of the basin, usually the Eogene and the Neogene, are older than those in the east part which are usually the Quaternary deposits. The pattern of the Cenozoic deposits in Luonan Basin is similar to that in Shangzhou Basin (Li Kaoshe, personal communication), a basin locating just to the south of Luonan Basin.

近40年秦岭南北地区气候变化及与El Nino/La Nina事件相关性分析

通过对近 40年来秦岭南北地区气候变化及与ElNino/LaNina事件相关性研究发现 ,秦岭南北地区气温与降水同步波动 ,但波动幅度有差别。二者都有暖干化趋势 ,秦岭以北变暖程度超过秦岭以南 ,而秦岭以南年降水量的绝对减少量大于秦岭以北 ,两地年平均气温和年降水量差值有缩小趋势。LaNina事件对秦岭南北地区的影响大于ElNino事件 ,LaNina年年平均气温明显下降 ,超过极显著相关水平 ,而降水增多。ElNino年气温略有升高趋势 ,降水略有减少趋势 。

贺兰山东麓葡萄园不同方位摘叶对赤霞珠果实品质的影响

酿酒葡萄转色后摘叶会改变微气候,从而影响葡萄果实糖、酸、酚类物质等品质因子的积累。以南北行向种植的赤霞珠酿酒葡萄为试验材料,在贺兰山东麓酿酒葡萄果园开展葡萄东面摘叶、西面摘叶和东西两面摘叶三种方式摘叶试验,以田间正常叶幕水平为对照,研究不同摘叶方位对成熟期果实品质的影响。结果表明:(1)与对照相比,赤霞珠酿酒葡萄果实转色后进行东面摘叶可使成熟果实中可溶性固形物、葡萄糖、果糖、总酸、糖酸比、苹果酸、柠檬酸、酒石酸和单宁含量不同程度增加,其中果糖、柠檬酸和酒石酸含量增加显著;果实还原糖、总酚、花青素含量比对照减少,但差异不显著。(2)西面摘叶处理下成熟葡萄果实可溶性固形物、还原糖、总酚和花青素含量略下降,果糖、苹果酸、柠檬酸和单宁显著上升,葡萄糖和酒石酸含量略上升。(3)双面摘叶葡萄果实的单宁含量显著增加,葡萄糖、果糖、柠檬酸和酒石酸含量略增加,可溶性固形物、还原糖、总酸、苹果酸、总酚和花青素含量都比对照要低。综合分析认为,摘叶后葡萄果实糖的含量整体呈不显著增加,但东面摘叶处理葡萄果实中酸含量均提高、单宁含量增加,总酚和花青素虽然略有减少,减少幅度相对最小。针对目前贺兰山东麓葡萄酒产区糖高酸低现状,建议在贺兰山东麓南北行向种植的葡萄园,采用东面摘叶为主的叶幕管理模式进行果实品质因子调控,从而达到平衡葡萄果实整体风味物质的作用。

生态之美·民俗之奇·人文之智——地域文化视域中的贾平凹《秦岭记》解读

《秦岭记》是贾平凹严格意义上的第一部笔记体小说,被誉为贾平凹的“山海经”。《秦岭记》继承了《商州三录》《山本》的秦岭叙事,但又不同于贾平凹从前的写作模式与叙事结构,它以笔记小说的形式讲述了五十七个秦岭故事,以展现广博的秦岭地域风貌及特色文化为主,从生态之美、民俗之奇、人文之智三方面呈现出贾平凹对秦岭全方位的观察与理解,并试图破解秦岭数千年所沉淀下的“仰观象于玄表,俯察式于群形”的文化密码,探究贯通秦岭的物质现实与精神观念。

基于AHP-EWM-TOPSIS的秦岭北麓西安段冰酒葡萄生态适宜性评价

本研究旨在评估冰酒葡萄(Ice wine grape)在秦岭北麓西安段的生态适宜性,以促进该作物种植的经济潜力并优化当地葡萄产业结构。根据冰酒葡萄生长需求和秦岭北麓自然气候特点,研究选取最冷月均温、≥10℃有效积温、生长季干燥度、坡度、土壤pH等评价因子,确立冰酒葡萄适宜性评价体系。基于秦岭北麓西安段2000—2021年逐日气象观测数据、生态数据,采用层次分析法(AHP)、改进熵值法(EWM)、TOPSIS综合评价法,本研究构建了一个冰酒葡萄种植综合区划评估模型,对影响冰酒葡萄种植的气候、地形、土壤三大指标的空间分布进行分析。经统计分析得出最适宜区、适宜区、次适宜区和不适宜区4个等级。结果表明,所提出的方法能够有效地识别秦岭北麓西安段内冰酒葡萄种植的生态优势区域,且所得区划结果与实际情况高度一致。这一发现对冰酒葡萄种植的区域布局和科学规划提供了重要参考。

新疆东天山康古尔一带金矿地质特征及成矿机制

新疆康古尔一带的金矿床位于塔里木板块北缘的东天山秋格明塔什—黄山韧性剪切带南缘,是新疆的重要金成矿区。二叠纪早中期,在SN向推覆韧性剪切和右行走滑韧-脆性剪切基础上,地壳快速抬升在韧性变形构造上叠加脆性破裂,一系列张性断裂成为主要容矿构造;同构造期侵位的中酸性浅成斑岩体(如石英斑岩)提供了充足的成矿热源和部分水源及成矿物质来源;康古尔一带金矿矿化型式各不相同,既有产于构造破碎带中的蚀变岩型金矿、石英脉金矿,也有产于火山角砾岩筒中的脉状金矿,还有产于斑岩体边缘或产于岩体内部的斑岩型金矿;但成矿流体的物理化学特征均具中低温、低盐度、中低压力的特点;金矿的形成分为2个热液成矿阶段,其中晚期阶段是金的主要形成阶段。本文对该区金的成矿物理化学环境进行了讨论,并总结了成矿机制,认为康古尔一带金矿形成于统一的岩浆热液成矿系统,成矿作用与区域构造的脆性构造活动同步发生,金矿成矿时段大致在二叠纪晚期(263 Ma—243 Ma);下一步找矿工作应在有利的物化探异常中预测和寻找不同地质产状的中低温浅成热液型金矿。

贺兰山东麓不同子产区土壤对葡萄酒品质的影响研究

为了研究贺兰山东麓子产区土壤对赤霞珠葡萄酒品质的影响,分别选取了金山产区、银川产区、石嘴山产区、红寺堡产区、青铜峡产区和永宁产区的6个酒庄中土壤和子产区所酿造赤霞珠葡萄酒为研究对象。通过相关性分析,葡萄酒中的酚类物质花色苷除了与土壤中的EC呈负相关,其余的都呈正相关,而总酚只与土壤中的pH和全钾呈正相关,单宁与土壤pH呈正相关;葡萄酒中的总糖与总酸只与土壤pH呈正相关,其余呈负相关;挥发酸与EC、有机碳、碱解氮、有效磷、速效钾、全氮、全磷均呈正相关;酒精度与土壤pH呈正相关。由此证明,葡萄酒质量相关指标总糖、总酸、酚类物质、挥发酸、酒精度与土壤中的pH、有效磷、速效钾、全氮、全钾、EC含量存在关联。通过感官评价分析,产区所产葡萄酒入口柔顺,口感强劲而丰富,酒体饱满,典型性和结构感强,单宁和酸度均适中,余味适中。综合来看,贺兰山东麓子产区葡萄酒的品质和土壤pH、有效磷、速效钾、全氮、全钾、EC含量有关联性,并且呈正相关。

宁夏贺兰山东麓产区葡萄酒品牌营销现状及对策分析

历经近40年的发展,宁夏葡萄酒产业已进入品牌化提升、高质量发展新阶段。为进一步了解宁夏贺兰山东麓葡萄酒产区品牌发展现状,笔者调研梳理了产区品牌及营销体系建设情况,在此基础上进一步剖析当前品牌营销中存在的问题,得出:宁夏葡萄酒品牌营销还需在树牢品牌思维、精准展会推介、强化战略营销、盘活渠道资源、精心谋划文旅博览会、构建营销团队上持续发力。

东秦岭深源浅成型花岗岩的成矿作用及地质构造背景

东秦岭位于华北板块与扬子板块之间的拼合带———秦岭造山带的东段。该区构造岩浆活动强烈 ,有色金属、贵金属的成矿作用发育 ,是中国著名的Mo ,W ,Au多金属成矿带 ,也是中国最大的Mo,Au ,W等矿产基地与重要的矿集区之一。通过深源浅成型花岗岩的特征、形成机制和成矿特点的研究 ,发现成矿多与中生代燕山期 (170～ 10 0Ma)的深源浅成型花岗岩类有关 ,并生成一系列斑岩_爆破角砾岩型矿床。矿床具有深源、与岩体同时、同空间以及岩体的成矿元素丰度高等特点。矿床类型与岩浆成分有关 ,表现出明显的成矿专属性。矿床的形成受区域构造演化作用的控制 ,成岩成矿作用是燕山期中国东部在陆内俯冲的背景下 ,岩石圈巨大减薄 ,引起软流圈抬升和地幔上涌造成的。

东秦岭二郎坪群硅质岩热水沉积地球化学特征及其地质意义

二郎坪群硅质岩成因研究对二郎坪群的构造背景和铜多金属矿床成因的确定具有重要意义。通过对二郎坪群中三种硅质岩的地质特征和岩石地球化学分析，认为二郎坪群硅质岩是典型的热水沉积硅质岩。常量元素地球化学特征值（N（Al）／N（Al＋Fe＋Mn）指示该硅质岩的沉积环境存在东西差异，南阳盆地以东弧后盆地的规模较大（N（Al）／N（Al＋Fe＋Mn）=0．30—0．45），沉积环境类似远洋盆地，硅质岩的热液成分比例大，受陆缘物质影响小；而南阳盆地以西弧后盆地的规模较小（N（Al）／N（Al＋Fe＋Mn）=0．59），沉积环境为近大陆的边缘海，硅质岩Al含量相对较高，受到陆缘物质影响相对大。地质特征和稀土元素特征（负Eu异常、弱负Ce异常）揭示了二郎坪群硅质岩是弧后盆地型低温热液流体和海水混合形成，这为二郎坪群形成于弧后盆地构造环境的认识提供了新的重要证据。热水沉积硅质岩与铜多金属矿床的共生关系证明研究区铜金属矿床的成因是海底热液喷流沉积作用。

安徽省金寨县沙坪沟钼矿辉钼矿Re-Os年龄--兼论东秦岭-大别山中生代钼成矿作用期次划分

安徽省金寨县沙坪沟钼矿是新发现的超大型斑岩型钼矿床。文章介绍了该矿床的基本地质特征,并对其进行了精确的辉钼矿Re-Os同位素年代学测定。结果表明,沙坪沟钼矿辉钼矿模式年龄为(112.2±1.7)^(113.9±1.7)Ma,加权平均年龄为(113.18±0.54)Ma,MSWD=0.39;等时线年龄为(113.21±0.53)Ma,MSWD=0.64,表明沙坪沟钼矿形成于早白垩世晚期。结合区域上已有的岩体高精度年代学数据、矿床辉钼矿Re-Os年代学数据和钼矿产出的大地构造位置,将东秦岭-大别山中生代钼成矿作用划分为2期4个阶段:印支期(260~205Ma)和燕山期的晚侏罗世—早白垩世早期(148~138 Ma),早白垩世中期(135~119 Ma)和早白垩世晚期(116~105Ma),其中,以燕山期钼成矿作用最为强烈。