西昌复合盆地层序界面研究及意义

根据界面组构特征、延伸范围、侵蚀程度及间断期限，西昌复合盆地共识别出特级（3个）、超级（4个）、I级（3个）、Ⅱ级（2个）、Ⅲ级（7个）、Ⅳ级（59个）6个级别类型的层序界面，共78个，不同级别类型的层序层面，其组构、特征及分布各异。在此基础上，结合构造活动、盆地性质、盆山转换、海平面变化等，将西昌复合盆地78个层序界面归结为造山侵蚀、升隆侵蚀、陆上侵蚀、暴露溶蚀、水下间断、海侵上超等6种成因类型，不同成因类型界面其形成背景、成因机理明显不同。在层序界面级别类型及成因机理研究成果基础上，通过对层序界面与地层划分、盆地演化及油气储层关系的初步研究表明，层序界面不仅在油气勘探中发挥重要作用，而且在解决地层界线和盆地分析等问题中具有特殊意义。     

An updated inventory of marine opisthobranch(Mollusca,Gastropoda) from the territorial waters of the Republic of Mauritius

Island ecosystems support diverse aquatic invertebrate communities comprising endemic taxa. Documentation of existing species is important for conservation. In this study, a checklist of marine opisthobranch from the Republic of Mauritius is presented. A combination of benthic surveys(50 m×5 m in triplicates), rover diving techniques and photo documentation were used over two years(2018–2020)within 35 sheltered and unsheltered lagoons. Morphological and molecular analysis were used for identific...     

Significance of Carbon Isotopes in Carbonate Sequence Stratigraphy—As Exemplified by the Permian System in Southwest China

Based on the research on sequence stratigraphy of the Permian in Southwest China,in conjunction with the carbon isotope data from the typical sections at Ganluo,Sichuan and Tianlin and Masan,Guangxi,the authors suggest that the genetic framework and internal architicture of different sequences possess quite different carbon isotopic characteristics.Therefore ,the following problems can be solved in terms of carbon isotopic values,evolutionary curve patterns and structures of carbonate sequences:(1) to determe the nature of sequence boundary surface and related geological events;(2) to recognize various kinds of sedimentary system tracts;(3) to discuss the internal architicture and genetic framework of the sequences and their evolution;(4) to subdivide and correlate sedimentary sequences on a regional or global scale; and (5)to enhance the resolution of sequence stratigraphic analysis.Stable carbon isotopes have proved themselves to be valid in sequence stratigraphic studies of carbonate rocks,as demonstrated by our results presented in this paper.     

Migration and the transformation of employment and household structures

Data collected in Colombia and Thailand in 1977 are used to "compare the employment and household characteristics of migrants before and after the move in order to assess the degree of change which accompanies migration. Moreover, these comparisons [are] made for migration streams between places at different levels in the urban hierarchy with the intention of determining within which streams the greatest transformations occur."     

红拟石首鱼的中间培育和养成技术

目前，红拟石首鱼的养殖业正在发展，前景看好。该鱼的亲鱼可以在圈养条件下进行培育，可根据需要进行产卵，生产仔鱼。中间培养生产包括饵料生物培养以及仔鱼长到全长２５ｍｍ养成生产包括池塘养殖、网 箱养殖和闭合循环水槽系统密集养殖。     

全球大洋循环与热通量的估算

虽然大洋循环以及随之发生的热和气与大气圈的交换对气候影响强烈，而且全球循环的讨论前人已有很好的模式，但还缺乏定量性以及研究区的资料仍相互矛盾．这里我们提出一种全球大洋循环的规模和结构及其伴随的热通量的估算与动力和运动学相一致的模式，这种模式是由快速空间变化的水文流速数据综合得出的．我们发现没有单一的水体倒转单元，而是由一个复合的和可能随时间变化的循环类型所替代．最简单的解释表明存在两个近乎独立的单元：一是大西洋水体倒转通过南部大洋与其它盆地连接：另外一个是印度洋和太平洋盆地通过印度尼西亚群岛相联…     

地质公园的建设与发展

迄今为止，我国已建立国家地质公园44处，但地质公园建设与发展的理论体系还相当不健全。笔者就地质公园建设与发展中的地质公园选址、地质公园范围的界定和地质公园规划三个重要问题进行了初步探讨。这对国家地质公园建设与发展具有一定参考、借鉴或指导意义。