北京平原区东南缘钻孔TB02第四纪地层划分与沉积特征

第四纪地质对开发利用第四纪资源和城市地质安全具有重要意义。基于在北京市通州区南部永乐店镇实施的第四系钻孔TB02,通过系统的岩芯观察和编录、测井资料分析、AMS ¹⁴C测年和古地磁测年等手段,结合粒度参数指标特征,对钻孔TB02进行年代地层划分,并对沉积特征进行了探讨。结果表明:北京平原区东南缘第四系底界埋深为276.21 m,中更新统底界埋深为97.75 m,上更新统底界埋深为39.32 m,全新统底界埋深为6.40 m; 钻孔TB02沉积物以细粒物质为主,具有较好的分选性,呈现远源沉积的特征; 沉积水动力环境在2 588、1 539及781 ka发生了3次比较明显的变化。第四纪以来,北京平原区东南缘环境演化规律表现为:早更新世早期,沉积水体快速加深,以湖相沉积为主,沉积环境稳定且水动力较弱; 早更新世晚期,主要发育河流沉积,陆源碎屑供给较充足,沉积水动力较强; 中更新世以来,为泛滥平原沉积,水动力减弱,以沉积细粒物质为主,沉积地貌逐渐定型,形成了广阔的平原区。     

99 + matches but a spark ain’t one: Adverse psychological effects of excessive swiping on dating apps

Studies showed adverse experiences related to the use of dating applications such as Tinder. However, it remains unclear by which mechanism and under which conditions dating app use has undesired effects. As a mechanism, we investigated excessive swiping, operationalized as youth’s mental preoccupation with profile browsing and swiping compulsivity. As moderators, we investigated swiping in assessment (i.e., critically evaluating profiles), and locomotion (i.e., taking intuitive gut decisions) modes. To this end, we surveyed a quota-sample of 464 transition age dating app users (16–25 years old). Moderated mediation analyses showed that dating app use was associated with excessive swiping, which was in turn linked to a) upward social comparison, b) fear of being single, and c) partner choice overload. In conclusion, frequent dating app use was related to undesired outcomes only when it was related to excessive swiping. Neither assessment, nor locomotion mode moderated these relationships; thus, excessive swiping is detrimental for young dating app users’ well-being, no matter how they swipe.     

东昆仑祁漫塔格地区库德尔特金矿区花岗闪长岩的时代、成因及其构造意义

库德尔特金矿床是东昆仑祁漫塔格新发现的一处中型金矿床，金矿赋存于花岗闪长岩中。通过对花岗闪长岩开展岩石地球化学、锆石U-Pb年代学和Hf同位素研究，探讨该矿床成岩时代、成因类型和构造环境。研究结果显示：花岗闪长岩为一套准铝质高钾钙碱性岩石系列，呈现轻稀土富集的右倾分配模式，具有较明显的负Eu异常，富集大离子亲石元素（Rb、K）、活泼不相容元素（Th、U）和LREE元素，相对亏损高场强元素（Nb、Ta、Ti、P）、HREE元素和Sr元素，成岩年龄为（242.9±1.3）Ma。结合前人研究成果，认为库德尔特花岗闪长岩是在中三叠世大洋板块俯冲与碰撞转换环境中形成的I型花岗岩。     

Dating in the dark: Vulnerable narcissism predicts inauthentic self-presentation in online dating

The current study investigated whether Dark Triad traits (vulnerable and grandiose narcissism, primary and secondary psychopathy, and Machiavellianism views and tactics) predicted inauthentic self-presentation whilst dating online, and whether those who reported engaging in antisocial dating behaviours were higher on Dark Triad traits, and more likely to self-present inauthentically in online dating. Online daters (N = 313) were recruited via Prolific and completed measures to assess Dark Triad traits, inauthenticity, and antisocial dating behaviours (i.e., ghosting and breadcrumbing). Vulnerable narcissism was a significant predictor of online dating inauthentic self-presentation. No other Dark Triad traits emerged as significant predictors. Online dating inauthentic self-presentation was significantly higher for those who had breadcrumbed someone. Those who had ghosted someone had significantly greater vulnerable narcissism and secondary psychopathy, and those who had breadcrumbed someone had significantly greater vulnerable narcissism and Machiavellianism views than those who had not. As previous research has demonstrated that individuals high on vulnerable narcissism are more likely to perpetrate intimate partner violence, online daters should consider evidence of inauthenticity to be ‘red flags’ for potential harm as interactions continue. Especially given the current study demonstrated those who had previously ghosted and breadcrumbed were higher on vulnerable narcissism.