云南元江地区铜矿GIS预测时的找矿有利度和空间相关性分析

以云南元江地区铜矿ＧＩＳ预测为例,介绍了线型异常和面型异常的找矿有利度分析方法,并给出断裂、物化探异常和地层找矿有利度分析的结果．给出了计算空间相关性的公式,并研究了不同元素化探异常的空间相关性．研究了相关元素的组合异常,论证了在矿产资源预测中应用组合异常的必要性．     

中国石炭纪生物礁造礁群落演化

中国石炭纪造礁群落是弗拉斯期—法门期生物绝灭事件后新兴起的。该群落在早期演化过程中经历了形成、发展、完善和衰落的过程,构成一个群落演化旋回。晚期又开始新一轮的旋回,群落的二分性十分显著。显然,石炭纪造礁群落代表一个不连续的演化过程。     

活动断裂带的壤中气汞量测量研究

在覆盖区应用壤中气汞量测量研究活动断裂是一种新方法,它不仅能较准确地确定活动断裂的位置,还可以确定其产状,规模,活动性及相对强度,甚至可以作为确定断裂力学性质的参考,本文简棕了断裂带壤中气汞量测量的基本原理,并以长江三峡,长春,吉林等地利用该种方法研究活动断裂的成果为例,说明该项研究的效果及应用前景。     

Prediction of the Earlier Strong Aftershocks in the Earthquake Sequences by the Pseudo-Periodicity Method

We propose the pseudo-periodicity method and its quantitative prediction indexes for the occurrence time of earlier strong aftershock. We conducted tests of regressive prediction, and the R-value of the tests is 0.45, indicating that this method is effective for prediction.     

Characteristics of the Variation of Cross Fault Short-Baseline and Short-Range Leveling in Western Yunnan Earthquake Test Site Before Lijiang M_S7.0 Earthquake

Results of analysis of variation of cross fault short-baseline and short-range leveling in Western Yunnan Earthquake Test Site (WYETS), results show that among five observation stations of cross fault short-baseline and short-range leveling in WYETS before the Lijiang MS7.0 Earthquake occurred in February 1996 only Yongsheng observation station (epicentral distance 82 km) located at Chenghai fault shows great variation about one year before the earthquake. And the nearest observation station, Lijiang (epicentral distance 42 km); presents great coseismic variation, but does not show obvious anomalous variation before the earthquake. There are no significant variations related to the earthquake at the other three observation stations. Two methods are used in analysis of the observed data and some valuable results have been obtained.     

Quaternary Tectonic Deformation in Front Area of the Tianjingshan Fault Zone and Analysis of Its Genesis

Through detailed field mapping, the tectonic deformation in the front area of the Tianjingshan fault zone is discussed in this paper. The result shows that there are two Quaternary thrust (oblique) fault-fold belts, namely: the Miaoshan and Hongjianshan fault-fold belts, in the front area of the south wall's strike-slip movement of the Tianjingshan fault zone. The Hejiakouzi Quaternary anticline, which is a part of the Miaoshan fault-fold belt, is mainly discussed. It is pointed out that the fold began to grow in the middle part near Hejiakouzi in the mid-late stage of middle Pleistocene epoch and then gradually developed towards the ends in late Quaternary. Based on the Cenozoic structural features, the genesis of the Miaoshan and Hongjianshan fault-fold belts and the kinematic relation they bear with the Tianjingshan fault zone are analyzed.     

近场立交成因模式及强震预报

详细地讨论了强震孕育的近场立交成因模式,将其应用于强震的预报,并提出了强震预报的思路.作者还进一步讨论了横向断层对传播断层的止裂条件及深部断层的存在等问题.     

成组中强震前后动态小震的时空活动特征

分析了进入活跃时段以来,新疆及邻近地区自１９９５年３月１９日和硕Ｍｓ５．０地震后,相继发生的１２次Ｍｓ≥４．７地震前后调制小震和动态小震的时空活动特征,据此提出了孕系统失稳模式;     

1994年9月16日台湾海峡7.3级地震震源过程的研究

采用数字化台网Ｐ波波形资料及台湾台网Ｐ波初动方向资料,研究了１９９４年９月１６日台湾海峡７３级地震及邻近地区（北纬２１～２６°,东经１１５～１２０°）ＭＬ≥５８级共５次地震的矩张量解及震源参数。结果表明,这次７３级地震的矩张量解以双力偶成分为主,是断层面接近ＮＷ走向的正断层。断层面的走向与大震前地震的条带分布走向及余震分布显示的破裂图象较相象,震源机制的张应力轴接近水平,近ＮＥ走向;压应力轴几乎垂直,近ＮＷＷ走向,似乎表明这次地震是受菲律海板块向欧亚板块北西向挤压的力源控制。从Ｐ轴接近竖直而Ｔ轴接近水平来看,发震断层为强烈拉张性正断层,可能还同时存在垂直向上的应力作用。其它４个强震的震源机制解与７３级大震的差别较大。这些地震震源机制解的复杂性,表明台湾海峡地震序列的发展过程比较复杂。     

香港地区活动断裂的初步探讨

香港地区的断裂构造颇为发育,主要有北东、北东东和北西向三组断裂。在现今构造应力场作用之下,北东东和北西向断裂组成共轭断裂系统。由于本地区地震活动水平不高,尚难确定哪组断裂与地震活动密切相关。断层泥的热释光资料表明,断裂的最新活动应在晚更新世,断裂的复发周期应在１０万年左右。目前尚不能肯定哪条断裂为活动断裂。