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  • Ensemble Face Adaptation Effects: Evidence from RSVP

    Subjects: Psychology >> Cognitive Psychology submitted time 2024-04-27

    Abstract: In our daily lives, we are often confronted with a plethora of diverse and intricate adaptive stimuli. Prior research has predominantly focused on investigating the processing mechanisms of individual faces from the perspective of adaptation effects, yielding relatively consistent findings. However, controversies persist regarding the formation process of average representations in ensemble face adaptation effects, accompanied by a dearth of comprehensive explorations into ensemble face processing mechanisms. Attractiveness, as a crucial and distinct dimension in face perception, exhibits a phenomenon known as the averageness attractiveness effect, wherein faces perceived as more average tend to be rated as more attractive. This effect serves as a tool to examine the generation process of ensemble face adaptation effects and to further elucidate the processing of ensemble faces. This study employed a rapid serial visual presentation paradigm to investigate ensemble face adaptation effects from the perspective of cognitive load, aiming to advance our understanding of ensemble face processing mechanisms. Experiment 1 employed a within-subject design featuring three adaptation conditions (high attractiveness faces, low attractiveness faces, mixed faces). Results indicated that after adapting to low (high) attractiveness faces, individuals exhibited increased (decreased) judgments towards new faces, thus demonstrating adaptation effects. This outcome substantiates the notion that individuals process ensemble faces via holistic averaging. In Experiment 2, cognitive load manipulation was introduced with a mixed design of 2 (adaptation type: high attractiveness faces, low attractiveness faces) × 2 (load level: high load, low load). Results revealed that under both high and low cognitive load conditions, individuals exhibited adaptation effects after adapting to low (high) attractiveness faces, thus indicating that individuals employ an automated processing mechanism for ensemble faces. This study, by utilizing rapid presentation of single faces to form face ensembles, demonstrated that under conditions of rapid serial presentation, adaptation effects are based on the holistic averaging of ensemble faces, unveiling the processing of ensemble faces. Furthermore, by manipulating cognitive load, this study for the first time investigated the processing mode of ensemble faces and the role of cognitive resources in ensemble face processing. The findings corroborate the existence of ensemble face adaptation effects even under conditions of limited cognitive resources, suggesting that individuals process ensemble faces in an automated manner, thereby contributing to a more comprehensive understanding of face processing research.

  • The Cross-Modal Integration Process in Facial Attractiveness Judgments

    Subjects: Psychology >> Cognitive Psychology submitted time 2024-01-15

    Abstract: Prior research on facial attractiveness judgments has predominantly focused on visual information, overlooking the role of non-visual cues. Current studies have confirmed the existence of cross-modal interaction in facial attractiveness judgments, emphasizing cross-modal integration. Building on this foundation, this study integrates Face-space model and Bayesian causal inference models to propose that during the cross-modal integration process of facial attractiveness judgments, individuals naturally amalgamate various sensory inputs in the brain, forming a unified representation of the target face when inferring that different sensory information emanates from the same facial source. Future research may extend facial investigations into broader environmental contexts, examining cross-modal integration of diverse sensory information and further exploring the boundary conditions of cross-modal integration, particularly in the context of social interactions, to construct a more systematic model for cross-modal integration in facial attractiveness judgments.

  • Evaluation of facial trustworthiness in older adults: A positivity effect and its mechanism

    Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-10-09 Cooperative journals: 《心理科学进展》

    Abstract: The positivity effect in facial trustworthiness evaluation refers to the phenomenon that older adults (OA) tend to evaluate unfamiliar faces as more trustworthy than younger adults (YA). Numerous previous studies have reported the presence of the positivity effect in judgments of trustworthy, neutral, and untrustworthy unfamiliar faces. Socioemotional selectivity theory (SST) and the dynamic integration theory (DIT) explain the underlying mechanisms of the positivity effect from the perspective of cognitive control and cognitive decline respectively, but a unified model has yet been established. According to the SST, OA with adequate cognitive resources can actively improve their evaluation of facial trustworthiness by selectively paying more attention to trustworthy faces or/and less attention to untrustworthy faces. In contrast, according to the DIT, cognitive decline in OA can lead to a passive increase in attention towards trustworthy faces or/and a decrease in attention towards untrustworthy faces, which can also improve the evaluation. There are discrepancies in the results of previous empirical studies as well. Some studies have supported the motivation explanation of the SST by demonstrating that OA may require sufficient cognitive resources to better process trustworthy faces than YA and thereby improve the evaluation of these faces. However, other studies have supported the cognitive explanation of DIT by showing that OA may “passively” improve their trust evaluations by reducing their processing of untrustworthy faces due to cognitive decline. Neuroimaging studies have found that the functions of the amygdala and anterior insula, which are sensitive to untrustworthy faces, decline with age. This could lead to a decrease in the ability of OA to recognize untrustworthy faces, resulting in reduced processing of such faces and a perception of higher trustworthiness evaluation. On the other hand, the function of the caudate nucleus, which is sensitive to trustworthy faces, enhances with age. This may enhance the rewarding significance of trustworthy faces for OA, resulting in increased processing of such faces and a perception of higher trustworthiness. Based on the theoretical mechanisms and empirical researches mentioned above, a dual-process model of the positivity effect in facial trustworthiness evaluation is proposed. Specifically, for trustworthy faces, OA may tend to “actively” increase their attention to it and show higher trust evaluations through cognitive control. For untrustworthy faces, OA may “passively” decrease their attention to it due to cognitive decline and show higher trust evaluations. Future research should take into account the physiological, psychological, and social changes that come with aging to construct a more comprehensive theoretical framework for explaining the OA positivity effect in facial trustworthiness evaluation. Secondly, by quantifying the age-related differences in facial trustworthiness at different stages using eye-tracking and event-related potentials (ERPs), we might be able to better understand the cognitive mechanisms underlying the positivity effect. In addition, using multiple analytical methods and combining them with behavioral data can further clarify the neural mechanisms. Finally, mindfulness practices as well as transcranial magnetic stimulation can be also introduced to help reduce older adults' vulnerability to fraud in the initial interpersonal interactions. Key words

  • Effect of Bi-Content on Microstructure Evolution of Al-Bi Monotectic Alloy

    Subjects: Materials Science >> Materials Science (General) submitted time 2023-03-31 Cooperative journals: 《材料研究学报》

    Abstract: The effect of Bi-content on microstructure evolution of Al-Bi monotectic alloy and solidification progress ofmiscibility gap under the action of gravity was studied by air cooling to desired temperatures and thenquenching, as well as bynumerical simulation. The average diameter and volume fraction of Bi-rich droplets in Al-10%Bi monotectic alloy are 1.1 and 12.8 times of those in Al-5%Bi monotectic alloyrespectively. A huge amount of large-size drops rich inBi gather in the lower part of Al-10% Bialloywith low solidification uniformity.The average size of drops rich in Bi in the alloy of Al-5%Bi with a uniform solidification; There's no large-size drops rich in Bi in the solidifiedmonotecticalloy with Al-3.4%Bi, and its solidification is uniform.The analysis demonstrates that the increase of the amount of Bi-rich phase may enhance the gravity action on the drops, thereby aggravate the solidification process with separation and decomposition of liquid phasesin the immiscible area, and enlargethe size and number of drops rich in Bi, whilethe synergistic action of Ostwald ripening and collision coagulation of drops yielda huge amount of large-size drops rich in Bi gathering in the lower part of the solidifying alloy, thus aggravates the macro segregation of the solidified monotectic alloy.

  • From Single Spark to Prairie Ablaze—Exploring New Paradigm to Cultivate Top Innovation Talents

    Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-03-28 Cooperative journals: 《中国科学院院刊》

    Abstract: At the dawn of the 4th Industrial Revolution, cultivating top innovation talents that innovate “zero-to-one” achievements, and constructing sustainable mechanism for cultivating such talents, is not only a critical task during the China’s national rejuvenation in the world experiencing a level of change unseen in a century, but also the key parameter for centenary or even millennium prosperity of Chinese nation. After over ten years of exploration, Tsien Excellence in Education Program of Tsinghua University (hereafter called “Tsien Class”) has made a single-point breakthrough in this subject. Based on this, nearly after one year of preparation, “Tsien Class” and Shenzhen government jointly founded the Xinstitute of Shenzhen, an institution with the mission of cultivating top innovation talents, which embodies the institutional and cultural advantages of China. We believe that, following this direction for another ten years, we will be able to establish a system, which is initiated in Shenzhen and radiates the whole country, that provides a new paradigm to Higher Education to cultivate top innovation talents.

  • 美在观察者眼中:陌生面孔吸引力评价中 的晕轮效应与泛化效应

    Subjects: Psychology >> Social Psychology submitted time 2023-03-27 Cooperative journals: 《心理学报》

    Abstract: Even though people usually agreed that “a book should not be judged by its cover”, researches had repeatedly demonstrated that individuals spontaneously and very swiftly formed impression on others based merely on the appearance of their faces. Facial attractiveness is an important content in the first perception. Which had been linked to outcomes as diverse as mate choice, job hunting, and cooperation. Given these real world consequences of the first impressions, it is important to understand how these impressions are formed. Some studies found that facial physical characteristics, such as symmetry, averageness and sexual dimorphism, had a great impact on facial attractiveness. While different individuals have different experience, when faced with the same face in the same context, different individuals have different evaluations on facial attractiveness. Some researchers put forward a new theory, namely, the observer hypothesis, which demonstrated that beauty is in the eye of the beholder. However, the processing of unfamiliar facial attractiveness remained unclear. The goal of the current study was to explore how we processed the impression of unfamiliar facial attractiveness. 19 males and 27 females took part in the experiment one and 16 males and 22 females participated in the experiment two, each experiment contained two phases that were learning tasks and evaluation tasks. In the learning phase, participants firstly learned to associate faces with negative, neutral, or positive trait words or imaged the behavior of the individuals to form different impression, which was contribute to the same valence between the neutral face and trait words or sentence. When participants could evaluate the valence of the face correctly, they could proceed to the next phase. In the experiment one, 13 males and 25 females had passed learning phase and evaluated the original faces and the unfamiliar faces. In the experiment two, 12 males and 17 females had done the learning task and evaluation task successfully. And in the evaluation phase, extend of warmth, competence and facial attractiveness of the unfamiliar faces, which had 50% similarity with the learned faces, were evaluated. Both of the two experiments had the same results, which showed that there are two ways to form unfamiliar facial attractiveness: (1) the first one is that generalization effect occurred after halo effect, compared with negative familiar faces, positive familiar faces were evaluated more attractive, so did the unfamiliar faces that were familiar with positive familiar faces; (2) the second one is that halo effect occurred after generalization effect, unfamiliar faces which were similar with positive familiar faces were not only evaluated more positive but also more attractive. The results suggested that generalization effect occurred after halo effect and halo effect occurred after generalization effect were the two ways to form unfamiliar facial attractiveness. In conclusion, halo effect and generalization effect play an important role in the processing of unfamiliar facial attractiveness.

  • 场景对面孔情绪探测的影响:特质性焦虑的调节作用

    Subjects: Psychology >> Social Psychology submitted time 2023-03-27 Cooperative journals: 《心理学报》

    Abstract: Facial expressions are fundamental emotional stimuli. They convey important information in social interaction. Most previous studies focused on the processing of isolated facial expressions. However, in everyday life, faces always appear within complex scenes. The emotional meaning of the scenes plays an important role in judging facial expressions. Additionally, facial expressions change constantly from appearance to disappearance. Visual scenes may have different effects on the processing of faces with different emotional intensities. Individual personality traits, such as trait anxiety, also affect the processing of facial expressions. For example, individuals with high trait anxiety have processing bias on negative emotional faces. The present study explored whether previously presented visual scenes affected the identification of emotions in morphed facial expressions, and whether the influences of visual scenes on the identification of facial expressions showed differences between individuals with high and low trait anxiety. Using the Spielberger State-Trait Anxiety Inventory (STAI), we placed 29 participants who scored in the top 27% in the high trait anxiety group (9 men and 20 women; mean age 19.76 � 1.3 years) and 28 participants who scored in the bottom 27% in the low trait anxiety group (11 males and 17 females, mean age 19.71 � 1.2 years). The images of faces (4 models, half male and half female) used in this study were selected from the NimStim Set of Facial Expressions. The face stimuli showed typical happy, neutral, and fearful expressions. Facial expressions were morphed to create a series of gradually varied images of facial expressions. Specifically, fearful face (100%) versus neutral face (0%) and happy face (100%) versus neutral face (0%) were morphed in 20% increments. In addition, 40 surrounding scene images were used, with 20 positive scenes and 20 negative scenes. In the face-emotion detection task, participants were asked to determine whether the emotion from the faces presented after the scenes were fearful, happy, or neutral. For the repeated measure ANOVA of the accuracy for facial expression detection, the results showed scene effects on the identification of emotions in facial expressions. The scene effects were varied between the different intensity of face emotion: for the emotionally vague faces, the detection of happy and fearful expression showed significant scene effects; for the faces with moderate emotional intensity, only the detection of the fearful faces showed significant scene effects; for the intense emotions on faces, there was a significant effect on happy and neutral faces but not on fearful faces. Trait anxiety as an individual factor was found to play a moderating role in the identification of facial expressions. For the high trait anxiety group, there were no significant differences in the accuracy of emotional detection between congruent and incongruent conditions. This means that the high trait anxiety group did not show significant scene effects. The low trait anxiety group showed a significant difference in the accuracy of identification of emotions in facial expressions between congruent and incongruent conditions, i.e., significant scene effects.In summary, the present study demonstrated that, for facial expressions with low emotional intensity, the identification of happy and fearful faces was more likely to be affected by visual scenes than the identification of neutral faces. Visual scenes were more likely to affect the identification of moderately fearful faces than moderately happy faces. Trait anxiety played a moderating role in the influence of visual scenes on emotional detection of facial expressions. Specifically, individuals with high trait anxiety were less affected by surrounding visual scenes and paid more attention to facial expressions.

  • Evaluation of facial trustworthiness in older adults: a positivity effect and its mechanism

    Subjects: Psychology >> Developmental Psychology submitted time 2023-03-14

    Abstract: The positivity effect in facial trustworthiness evaluation is that older adults are more positive in trustworthiness evaluation of unfamiliar faces than younger adults. Socioemotional selectivity theory and dynamic integration theory explain its mechanisms from the perspective of cognitive control and cognitive decline respectively, but a unified model has yet been established. Existing studies have found that under the condition of sufficient and insufficient cognitive resources, older adults would improve the trustworthiness evaluation of trustworthy and untrustworthy faces respectively. Neuroimaging studies have found that the decline of the amygdala and anterior insula may reduce the sensitivity of older adults to untrustworthy faces, while the hyperactivation of the caudate may enhance their sensitivity to trustworthy faces. In light of previous studies, a dual-process model of the positivity effect in facial trustworthiness evaluation was proposed. Future studies should attempt to construct a more comprehensive theoretical explanation framework, investigate the age difference of facial trustworthiness processing and clarify the neural mechanism by using a variety of analysis methods. Furthermore, mindfulness practices as well as transcranial magnetic stimulation can be introduced to help reduce older adults' vulnerability to fraud in the initial interpersonal interactions.

  • 准噶尔盆地大赖草分布格局及关键因子分析

    Subjects: Environmental Sciences, Resource Sciences >> Basic Disciplines of Environmental Science and Technology submitted time 2022-06-02 Cooperative journals: 《干旱区研究》

    Abstract:模拟、预测新疆准噶尔盆地沙丘禾草大赖草的生态适宜性及其空间分布特征,以及对未来气候变化的可 能响应,指导该濒危植物的保护。研究基于大赖草的24个自然分布点和8个环境因子,利用GIS空间分析和Max⁃ Ent模型,分析基准气候(19702000年)和社会经济路径SSP2下2050时段(20412060年)和2070时段(2081 2100年)大赖草的适宜分布范围及分布格局变化,并利用多元环境相似度面和最不相似变量探究影响大赖草分布 的关键气候因子。结果表明:(1)基准气候下,大赖草的适宜分布面积占新疆总面积的5.57%,主要集中于额尔齐 斯河流域附近的低覆盖度草地;(2)与基准气候相比,2050时段和2070时段大赖草的适生区呈显著减少趋势,占比 分别为0.99%和1.33%,适宜生境高度破碎化,适生区的质心向西北方高纬度和高海拔地区迁移;(3)最干月降水 量、降水量季节性变化和温度季节性变化是影响准噶尔盆地大赖草适宜分布的关键气候因子。

  • The Emotional Bias of Trait Anxiety on Pre-attentive Processing of Facial Expressions: An ERP Investigation

    Subjects: Psychology >> Cognitive Psychology submitted time 2021-09-07

    Abstract: Facial expressions are an important medium for understanding the emotional feelings of others. However, individual factors such as gender, age, and personality traits can influence the perception of facial expressions. For instance, individuals with elevated level of trait anxiety, which is measure of frequency and intensity of occurrence of anxiety related symptoms, show attentional bias towards emotional stimuli, that is, higher attention to emotional information such as facial expressions. These studies mostly focused on attentional processing stage, and it remains unclear whether trait anxiety affects the pre-attentive processing stage of facial expression perception. Pre-attentive processing is an automatic evaluation of whether attention is needed for the stimulus, thereby filtering out irrelevant information to conserve cognitive resources and improve the efficiency of information processing. Therefore, the present study aimed to investigate the pre-attentive processing of facial expressions and the bias to emotional stimuli of trait anxious individuals to emotional stimuli during the pre-attentive processing stage. According to the scores of Spielberger State-Trait Anxiety inventory (STAI), 20 participants who scored in the top 27% were assigned to the high trait anxiety group (13 women; mean age=19.02 ± 0.63 years) and 20 participants who scored in the bottom 27% were assigned to the low trait anxiety group (11 women; mean age=19.63 ± 0.88 years). The stimuli used in the experiment were happy, sad and neutral face pictures selected from the Chinese Facial Affective Picture System (CAFPS; Gong et al., 2011) including 10 pictures (5 females and 5 males) of each kind of emotion. The deviant-standard-reverse oddball paradigm included 4 types of facial expression sequences: neutral standard stimuli/happy deviant stimuli, happy standard stimuli/neutral deviant stimuli; neutral standard stimuli/sad deviant stimuli, and sad standard stimuli/neutral deviant stimuli. The standard stimuli mean that this type of stimuli were appeared about 80% of the time in the sequence, and the deviant stimuli were about 20%. Participants were instructed to detect unpredictable changes in the size of fixation cross in the center of visual field and press a corresponding button as fast and as accurate as possible, and ignored facial expressions. The results revealed that, the amplitudes of N170 elicited by deviant faces were significantly larger than standard faces. Importantly, in the early EMMN, the mean amplitude elicited by sad facial expressions was significantly larger than happy facial expressions in low trait anxiety group, but there was no significant difference between happy and sad facial expressions in high trait anxiety group. Moreover, the early EMMN amplitude of happy faces was significantly larger in the high trait anxiety group than in the low trait anxiety group. These results suggest that the high trait anxiety group has similar amplification of EMMN amplitude for both happy and sad expressions. Our results show that there is a difference between high and low trait anxiety in the pre-attentive processing of facial expression. This suggests that personality traits are important factors influencing the pre-attentive processing of facial expressions, and high trait anxiety individuals may have difficulty in effectively distinguishing between happy and sad emotional faces during the pre-attentive processing stage and have similar processing patterns for them.

  • 基于16S rRNA测序分析奶牛体外发酵中瘤胃细菌多样性的变化

    Subjects: Biology >> Zoology submitted time 2018-12-25 Cooperative journals: 《动物营养学报》

    Abstract:本试验旨在通过16S rRNA测序技术,分析奶牛体外发酵瘤胃微生物区系随时间推移的变化规律,为探究瘤胃微生物繁殖规律及完善体外发酵分析方法提供支持。试验使用体外产气法进行发酵。采集3头健康奶牛的新鲜瘤胃液,与人工唾液混合后,注入盛有发酵底物的发酵瓶,39 ℃水浴振荡培养,分别于0、6、12、24、48 h采集发酵液,用16S rRNA测序技术分析瘤胃细菌变化规律。结果表明:1)所有的序列被鉴定为14个门和59个属。随着时间的变化,在门水平上,纤维杆菌门(Fibrobacteres)、拟杆菌门(Bacteroidetes)和黏胶球形菌门(Lentisphaerae)的相对丰度减少,纤维杆菌门、拟杆菌门在48 h时显著低于其他时间点(P<0.05),黏胶球形菌门在24 h时显著低于其他时间点(P<0.05)。而螺旋体门(Spirochaetae)和变形菌门(Proteobacteria)的相对丰度增加,螺旋体门在48 h时显著高于其他时间点(P<0.05),变形菌门在12、24、48 h时显著高于其他时间点(P<0.05);随着时间的变化,在属水平上,丁酸弧菌属(Butyrivibrio)和瘤胃球菌属(Ruminococcus)的相对丰度增加,均在在48 h时显著高于其他时间点(P<0.05);而解琥珀酸菌属(Succiniclasticum)和普雷沃氏菌属(Prevotella)的相对丰度则减少,解琥珀酸菌属在24、48 h显著低于其他时间点(P<0.05),普雷沃氏菌属在48 h时显著低于其他时间点(P<0.05)。2)试验获得15 792个操作分类单位(OTU)并进行多样性分析,稀释曲线达到平台期;Simpson指数和Shannon指数均表明菌群丰度具有先降低后升高的趋势。综上所述,奶牛瘤胃体外发酵过程中,瘤胃细菌主要的门以及属的相对丰度以及多样性均随时间推移发生改变,且因瘤胃细菌功能差异在发酵过程的变化更为显著。因此,在使用体外发酵法进行研究时,应充分考虑瘤胃细菌的功能差异与底物以及人工唾液的营养物质减少引起的发酵环境变化的关系。

  • 面孔可信度对助人行为的影响:依恋安全的调节作用

    Subjects: Psychology >> Social Psychology submitted time 2018-09-07 Cooperative journals: 《心理学报》

    Abstract: 分别从特质依恋和状态依恋角度考察施助者的依恋安全在求助者面孔可信度与助人行为之间的调节作用。结果发现:(1)求助者面孔可信度影响助人行为, 面孔可信度高的求助者得到的助人行为显著多于面孔可信度低的求助者; (2)施助者的依恋安全调节求助者面孔可信度与助人行为之间的关系, 安全依恋能有效缓冲低面孔可信度带来助人行为下降的趋势。本研究结果表明依恋安全有助于提升社会安全感和促进亲社会行为, 因此应注重依恋安全的培养。

  • 自我积极表情加工优势效应:来自ERPs的证据

    Subjects: Psychology >> Cognitive Psychology submitted time 2018-09-07 Cooperative journals: 《心理学报》

    Abstract: 基于自我加工优势和内隐积极联想理论, 采用视觉搜索范式结合ERPs技术考察个体自我表情加工的特点, 并进一步探讨情绪效价和身份信息对面孔加工的直接影响。结果发现:(1)搜索自我快乐表情比自我愤怒表情及两类他人表情速度更快、正确率也更高; (2)自我快乐表情对N1、N2、LPP成分的激活显著大于自我愤怒表情及两类他人表情。自我表情加工存在积极加工偏向, 且这种加工优势在面孔加工早期视觉编码阶段就已出现。

  • 饲粮添加万寿菊提取物对肉鸡血清生化指标、抗氧化能力和免疫性能的影响

    Subjects: Biology >> Zoology submitted time 2017-10-10 Cooperative journals: 《动物营养学报》

    Abstract:本试验旨在研究饲粮添加万寿菊提取物对肉鸡血清生化指标、抗氧化能力和免疫性能的影响。选取1日龄爱拔益加(AA)肉鸡192只,随机分为3组,每组8个重复,每个重复8只鸡。对照组饲喂基础饲粮,试验组在基础饲粮中分别添加0.15%和0.60%的万寿菊提取物,即有效成分叶黄素含量分别为30和120 mg/kg,试验期42 d。结果表明:与对照组相比,1)饲粮添加0.60%万寿菊提取物使肉鸡血清甘油三酯和低密度脂蛋白胆固醇水平显著降低(P0.05)。综上,肉鸡饲粮中添加万寿菊提取物可以提高肉鸡机体的抗氧化能力和免疫性能,且对机体脂代谢有调节作用。

  • 渭河新生代盆地基底组成及其油气地质意义

    Subjects: Energy Science >> Energy Science (General) submitted time 2017-05-15

    Abstract:河盆地有无天然气一直是地学界研究的热点问题之一,而该问题的关键是有无气源岩的存在。为进一步评价因缺乏有效烃源岩而停顿多年的渭河盆地的油气地质前景,结合区域地质背景,通过二维地震反射特征、地热井伴生气及油气化探的CH4、CO2碳同位素数据和钻探成果综合分析,认为渭河盆地深部残留有晚古生代含煤地层:①二维地震反射剖面揭示,渭河盆地深部发育类似鄂尔多斯盆地石炭系—二叠系煤系地层特有的强反射特征(T9),对应于太原组9#、8#和山西组4#、3#主力煤层反射;②地热井伴生气及油气化探样品中δ13CH4在-24.5‰ ~ -40.2‰之间,属于煤型热解—裂解气,大多数样品δ13 Cco2<-10‰,属有机成因气;③渭参3井揭示盆内存在上古生界二叠系石盒子组,推测下部存在山西组和太原组地层;④渭河盆地在晚古生代为大华北克拉通的一部分,沉积有煤系地层,三叠纪末期开始遭受一定的隆升剥蚀,至新生代渭河断陷盆地开始形成,盆地周缘发生大规模隆升剥蚀,而渭河盆地内这一时期接受了巨厚沉积,前新生代地层(上古生代煤系地层等)得以保存和深埋,即构造演化的差异造成了不同构造单元地层剥蚀和残留程度的差异。综合认为晚古生代煤系地层甚至更晚层位存在于渭河盆地的西安凹陷、固市凹陷和咸渭凸起的部分区域。渭河盆地晚古生代含煤地层可作为油气及氦气载体气的气源岩,为渭河盆地油气及富氦天然气勘探提供了物质基础,同时可为鄂尔多斯周缘断陷盆地群油气资源调查提供借鉴。