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于板块俯冲边界发育的加积体——流体移动及其作用
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作者 芦寿一郎 沈耀龙 《海洋地质译丛》 1991年第3期18-23,共6页
前言目前,在日本列岛及其周边,要举出经构造变形最频繁的区域,则可能为自东海岸外至日向岸外绵延的南海海槽的陆侧斜坡。在这里,伴随大洋板块俯冲所括削下来的沉积物在陆侧相继被挤压、加积在陆壳上,由于逐渐固结而生成了新地壳。这样... 前言目前,在日本列岛及其周边,要举出经构造变形最频繁的区域,则可能为自东海岸外至日向岸外绵延的南海海槽的陆侧斜坡。在这里,伴随大洋板块俯冲所括削下来的沉积物在陆侧相继被挤压、加积在陆壳上,由于逐渐固结而生成了新地壳。这样形成的地壳称为加积体,或据其剖面上的形状称为加积柱。在加积体前缘部分(在海侧)分布着一级活断层,但通常认为它伴随板块俯冲的大地震发生于靠近加积体的陆侧斜坡。 展开更多
关键词 板块 俯冲 边界发育 加积体
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珠江口盆地珠三坳陷南边界断裂发育方式分析及其意义 被引量:11
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作者 陈桂华 《海洋石油》 CAS 2002年第3期33-38,共6页
利用断距展开图 ,借用构造研究中的回剥法 ,即断距展开回剥 ,判断各期半地堑的连接方式及发育级次 ,从而得到物源输入的位置 ,结合构造脊分析及地球化学分析判断油气运聚通道 ,指导油气勘探。分析认为珠江口盆地珠三坳陷南边界断裂发育... 利用断距展开图 ,借用构造研究中的回剥法 ,即断距展开回剥 ,判断各期半地堑的连接方式及发育级次 ,从而得到物源输入的位置 ,结合构造脊分析及地球化学分析判断油气运聚通道 ,指导油气勘探。分析认为珠江口盆地珠三坳陷南边界断裂发育方式可分为四种 :即基本单元式、串连式、传递式、雁列式。根据各沉积物源输入处与神狐隆起上构造脊相配合研究及珠三坳陷文昌A、B生油凹陷的烃源岩演化特征 ,认为神狐隆起上存在三种相态烃运移通道 ,即文昌B凹陷—QH36 - 2通道 ,文昌A、B凹陷—WC15 - 1、CC2 - 1通道 ,文昌A凹陷—KP1- 1通道。同时 ,综合分析盖层条件 ,提出QH36 - 2、WC15 - 1、CC2 - 1及WC2 0 - 1是神狐隆起上的有利勘探目标。 展开更多
关键词 珠江口盆地 珠三坳陷 断距展开回剥法 边界断裂发育方式 物源输入 构造脊 盖层 油气运移 油气聚集
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Immigration and Liberal Egalitarianism
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作者 Jorge M. Valadez 《Journal of Philosophy Study》 2013年第3期165-179,共15页
My principal objective in this paper is to examine what position liberal egalitarians should take regarding the issue of immigration. Given that liberal egalitarians grant central importance to individual autonomy and... My principal objective in this paper is to examine what position liberal egalitarians should take regarding the issue of immigration. Given that liberal egalitarians grant central importance to individual autonomy and the moral equality of all persons, their rejection of restrictive immigration policies appears to follow from these central normative commitments. Liberal egalitarians such as Joseph Carens and Phillip Cole have argued that those who are committed to individual autonomy and moral equality should advocate for an open borders position in immigration. I argue that it is a serious mistake for liberal egalitarians to advocate open national borders and that borders should instead be strategically regulated to reduce global economic inequalities through immigration policies systematically integrated into development programs for the poorest and most vulnerable countries. Open borders would create an open market for immigration slots to choice countries of destination, which out of practical necessity would have to delimit the number of new immigrants. It is well known in migration studies that those who are more educated, young, and have more resources are more likely to migrate than the very young, the elderly, the infirm, and the poorest individuals. Those left behind in developing countries suffer serious negative consequences from the emigration of the most highly educated, capable, and talented individuals in their society. I then argue that liberal egalitarians should grant particular moral consideration to the world's poorest and most vulnerable and that immigration policies strategically designed to prioritize their needs are actually more consistent with the dual commitments of individual autonomy and moral equality than an open borders position. I propose three principles of global justice that are consistent with liberal egalitarianism that should guide transnational moral obligations. I end the paper by arguing that two of these principles can be used to justify restricted immigration policies that would enable developed countries to partially discharge some of their moral obligations to developing countries while enhancing the autonomy of the world's most vulnerable people. 展开更多
关键词 IMMIGRATION global justice open borders MIGRATION liberal egalitarianism
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