流域地貌演化的不同阶段沟壑密度与切割深度关系研究

主要探讨了在流域地貌演化的不同阶段,沟壑密度与切割深度的复杂关系,建立了沟壑密度随切割深度变化的理论极值模型及相应阶段的函数,补充了各演化阶段地貌形态要素的定量、定性描述;反之,可用沟壑密度与切割深度的关系推断流域地貌的演化阶段。     

内蒙古兴安盟旅游资源评价

沿边地区的开放和东北地区经济技术协作的推进，为兴安盟开发旅游资源，发展旅游业提供了机遇。把旅游业作为先导产业，是振兴兴安盟经济的理想选择。综合评价了兴安盟旅游资源，提出了兴发盟旅游资源的开发设想。     

贺兰山西侧紫泥湖地区晚更新世以来冰缘地貌过程与环境变化

紫泥湖地区座落在贺兰山西边４５ｋｍ处，海拔高度约１２００ｍ，区域地形呈现向北“Ｖ”字形开口的箕状洼地，其上生长旱生植被群落，沿自南而北流的沟谷阶地下发育了冻融 褶皱、冰楔和砂楔等冰缘地貌类型和过程，研究结果表明区域年平均气温末次冰期早期（５５－３５ｋｂＢＰ）较氏１０．５－１２．５℃，末次冰期盛期（２０－１５ｋｂＢＰ）今低１２．５－１３．７     

河北磁县北西西向南山村－岔口活动断裂带活动特征与1830年磁县地震

河北磁县西部北西西向南山村－岔口活动断裂为北西西向磁县活动断裂西段，全长３５ｋｍ，又可再分为东西两段。全新世时期该断裂有多次活动，活动方式以具左旋性质的正倾滑为主。１８３０年磁县７．５级地震时，南山村－岔口断裂带出现新的地表破裂，地表垂直位移多处为２～４ｍ，最大约７ｍ。据目前资料，该断裂带最新两次地震事件的时间间隔约为３５００ａ。最近获取的位于磁县最高峰老爷山庙宇碑文资料，补充说明了邻近岔口活动断裂带的古建筑物在１８３０年地震中的严重破坏     

The significance of scarp retreat for cenozoic landform evolution on the Colorado Plateau,U.S.A.

Since the beginning of the Cenozoic period several hundreds of metres of the sedimentary cover have been removed from the Colorado Plateau. Palaeoclimatic considerations show that the Colorado Plateau has been dominated by dry climates throughout the Cenozoic with the possible exception of the early Palaeocene. Today in the still prevailing arid climate, which strongly accentuates differences in rock resistance, the relief shows a structurally controlled cuesta scarp topography in the slightly deformed strata of alternating resistance. In examining whether the denudational efficiency of scarp retreat was sufficient to account for the wide erosional gaps in the sedimentary cover, rates of scarp retreat were determined by using the information of dated volcanic material and by applying a new method, which calculates the amount of retreat from the width of beheaded valleys of known age. Rates of retreat range from 0·5 to 6·7 km my^?1. The results show that the rates of retreat are controlled by the thickness and resistance of the caprocks. A model of Cenozoic scarp retreat demonstrates that the rates of recession calculated for the scarps in Upper Cretaceous rocks were sufficient to bring them into their present positions from the centre of the Monument Uplift on the central Colorado Plateau. The late Eocene positions of the cliffs in the Early Tertiary formations give an indication of their maximal extent. After the Upper Cretaceous sediments had been removed from the uplifts, erosion cut through successively older rocks, and activated scarps in stratigraphically lower positions. Scarp retreat can operate simultaneously and independently at different levels, which enabled this erosional mechanism to remove great proportions of the sedimentary cover of the Colorado Plateau during the Cenozoic.     

FEATURES OF TECTONIC LANDFORM OF FAULT BLOCKS IN SOUTH CHINA COASTAL AREA

In this paper, the South China coastal area is divided into several fault block areas (first class), sub-areas (second class) and mini-areas (third class) based on their dynamic signs, heridity, uniformity, paricu-larity and the mode of action of tectonic stress. Their tectonic geomorphological features are elaborated and the amplitude as well as the rate of relative motion since the end of the late Pleistocene epoch are estimated from 14C data of the samples which fundamentally repres     

高州地区地震地质环境稳定性评价

在考察了高州地区地形地貌、地质构造、基岩与第四系分布及其厚度、地下水静动态特征、当地及周围地震活动的基础上，对高州地区的地震地质环境作出了综合评价，认为位于丘陵平原地区的高州市地震活动水平低，从未发生过5．0级地层，场区和近场区虽有多条断裂通过，但都是全新世非活动断裂，地下水位浅，第四系较薄，据此判定高州市地震地质环境稳定。     

哈密盆地风蚀地貌及其旅游价值

阐述了闻名全国的大风区－－哈密盆地风蚀地貌的成因、类型和分布特征。风蚀地貌由垄槽与劣地、蘑菇林、魔鬼城、大峡谷、洼地和戈壁等类型组成，其成因是在这种独具特色的地貌格局和气修条件的控制与作用下，经强劲大风的吹蚀和临时性暴雨洪水冲刷共同作用的结果。这种风蚀地貌景观的奇异特点和地域优势，具有很大的旅游价值。     

汾河流域地貌发育对构造运动和气候变化的响应

自中更新世中晚期以来，由于构造运动及气候变化，在汾河流域系列盆地中无论是地貌还是沉积都出现了相应的变化。根据对系列盆地中普遍发育的三级冲湖积台地的成因分析，发现发生于0.76MaBP,0.55MaBP及0.13MaBP的3次大幅度区域构造抬升是导致古湖盆湖退，三级台地形成的根源，根据对太原盆地东南边缘的一台地-洪山台地湖积层的分析，发现在相邻两次构造抬升之间的构造相对稳定期，气候变化完全控制着湖盆的演化，由第四纪气候的干湿变化对象太原盆地这样大的湖盆，一般只引起不大于4.5m的湖面升降，与构造抬升引起的湖面变动相差甚大，作为影响河湖地貌发育的2个主导因素，构造运动是主要的，气候变化只是在构造稳定期才突出地显示其影响。