1) island-arc background
岛弧背景
2) retroarc setting
弧后背景
3) cyke
弧形背景幕
5) island arc
岛弧
1.
The Kalaxianger porphyry copper deposit(belt)is located in a Late Paleozoic island arc on the southern margin of the Altay Mountains.
卡拉先格尔斑岩铜矿(带)位于阿尔泰东南缘晚古生代岛弧区,含矿斑岩主要为一套中-晚海西期的中酸性斑岩,围岩为中泥盆统北塔山组。
2.
The direction of paleocurrent was found to be 230°-356° and the sediments were found to originate from the southeast Bikou island arc, which is close to the active continental.
对关家沟组物源及其古水流分析,其古水流方向230°~356°,其物源主要来自南东侧活动大陆边缘的碧口岛弧,且秦岭全面碰撞造山期为早中生代。
3.
the basalt is belong island arc tholeiite and series of the calc-alkaline,and have character of island arc in rare earth element and trace element.
玄武岩属岛弧拉斑玄武岩和钙碱性系列,属太平洋型钠质类型,稀土、微量元素显示具岛弧特征,大地构造位置为岛弧中心靠近大洋一侧,与南侧那拉提晚泥盆—早石炭世侵入岩共同组成火山弧,同为古亚洲洋向北俯冲的产物。
6) island-arc
岛弧
1.
The ore-bearing porphyry at island-arc in the Gongpoquan Copper Deposit:its geology and geochemistry;
公婆泉铜矿岛弧型含矿斑岩地质地球化学特征
2.
The characteristics of the lithology,petrogeochemistry and microelements indicate that the volcanic rocks of Dahalajunshan Formation in this area should belong to the offspring of island-arc tectonic settings,instead of rift volcanic rocks.
在新源县一带进行1∶5万区域地质调查时,认为新源县一带的大哈拉军山组火山岩以中酸性岩为主,依据其岩性特征、地球化学特征、微量元素特征,认为此地区大哈拉军山组火山岩不属于裂谷火山岩,应属于岛弧构造环境产物。
3.
The author considers that there are close relationships between the plane form of island-arcs and submarine ridges.
东亚岛弧海沟系在平面形态上表现明显的不连续性,各段两端向大陆弯曲,中部向海凸出,这种形式与海底岭脊密切相关;地震活动沿岛弧呈狭窄的带状分布。
补充资料：岛弧
| 岛弧 island arc 呈弧形排列的群岛。弧形凸面朝向海洋，岛弧外侧常有深的海沟，是分割大洋盆地和边缘盆地的重要构造地貌单元。岛弧属构造活动地区，有强烈的地震和火山活动，如太平洋上的千岛群岛、阿留申群岛等。板块学说认为，岛弧是大洋板块向大陆板块俯冲时，大陆板块受挤上拱，隆起而成。 |
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条