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- The REE contents of rockbodies in geosynclines are relatively low because of their origination from the high proportion remelting of subducted ocean crust. 地槽區巖體的稀土元素含量及多種參數相對較低,主要與其起源于俯沖洋殼較大比例重熔有關(guān)。
- Oceanic crust can be tilted, which can be mistaken for magnetic inclination. 海洋地殼可能是傾斜的,造成測量磁傾角時(shí)的誤差。
- The sinking of oceanic crust at subduction zones carries water and carbon dioxide back into the mantle. 在俯沖區洋殼下沉,又把水和二氧化碳帶回地下。
- Some researchers believe that copper and gold are derived from sulfides in the mantle, which are decomposed for interaction with Fe3+-rich fluids or melts derived from the subducted oceanic slab. 斑巖銅礦伴生金屬組分的含量受許多因素控制,其中包括巖漿源區地幔演化、火成巖巖石類(lèi)型、巖漿侵位深度和成礦溫度等多個(gè)方面。
- Jurassic and Cretaceous, the marginal ocean basin was in the stage of ocean crust evolution and had a setting similar to mid-ocean ridge. 侏羅-白堊紀為洋盆洋殼演化期,處于類(lèi)似洋中脊的構造環(huán)境。
- The hypothesis was substantiated soon afterward by the discovery that periodic reversals of the Earth's magnetic field are recorded in the oceanic crust. 這個(gè)假定不久之后為發(fā)現所證實(shí)。 該發(fā)現表明地球磁場(chǎng)周期性的逆轉被記錄在海洋地殼中。
- Since the beginning of the upper Triassic epoch, the Indian plate upthrusted to the north over the Tethys oceanic crust and led to the closure of the Tethys in Eocene epoch. 晚三迭世開(kāi)始,印度板塊在特提斯洋殼上向北仰沖,并導致特提斯在始新世的關(guān)閉。
- Degassing impulses give rise to the strengthening of oceanic crust spreading which is correlated with phases of diastrophism creating folded orogenic belts. 排氫脈沖導致洋殼擴張的增強,而此則與創(chuàng )造出造山帶的地殼變動(dòng)幕相關(guān)。
- Within the Nanpanjiang Sea the Tianlin Basin located on its northern part, the Babu Basin with oceanic crust on its central part and the Qinfang Basin on its southern part. 南盤(pán)江海內部有北部的田林海盆,中部的八布洋盆和南部的欽防海盆。
- Further sea-floor spreading led to the occurrence of oceanic crust in Babu Basin and the Nanpanjiang Sea exceeded beyond 20 latitudes from north to south in Early Carboniferous. 進(jìn)一步的海底擴張導致早石炭世時(shí)八布海盆出現洋殼,南盤(pán)江海成為南北超過(guò)20個(gè)緯度的小洋盆。
- On the other hand, because this portion of oceanic crust is located at the northernmost of the South China Sea, it also could be related to the formation of the South China Sea. 然而,因為這地區又正好屬于南海的最東北邊,其性質(zhì)可能也與南海的海洋地殼屬性很接近。
- The oceanic crust off southwestern Taiwan is located near the junction area between the Chinese continental margin and the northernmost South China Sea (Figure 1). 臺灣西南外海的海洋地殼位于南海與大陸邊緣盆地的交接處。
- The Mashan Group is the basement of Jiamusi Massif, whereas the Heilongjiang Group represents an accretionary-collision complex containing remnants of oceanic crust. 穆棱地區的“麻山群”為佳木斯地塊南緣的陸殼基底,其南側的“黑龍江群”為包括洋殼殘片在內的增生-碰撞雜巖。
- Sea salt not only dissolves from rocks, it also reacts with the rocks of the ocean crust and volcanic lava.The reactions take some of the salts in seawater away from the sea. 巖石溶解產(chǎn)生海鹽,而同時(shí),海鹽又與大洋地殼中的巖石和火山熔巖進(jìn)行化學(xué)反應,從而把一部分鹽分從海水中帶走。
- In 1991 David Sparks and Mark Parmentier, both then at Brown University, proposed an answer rooted in the variable temperature of ocean crust and the uppermost mantle. 1991年,美國布朗大學(xué)的斯巴克斯(DavidSparks)與巴曼提耶(MarkParmentier)提出解答,關(guān)鍵就在海洋地殼與地函頂層的溫度變化。
- Shaerbuer opholites represent fragments of ocean crust which are ancient middle Asia ocean between Siberian ancient plate and Tarin plate which was parts of the Kazakhstan Plate. 沙爾布爾蛇綠巖,為西伯利亞古板塊與塔里木古板塊之間的廣襄古大洋一古中亞大洋的殘片,即哈薩克斯坦板塊的組成部分。
- The oceanic crust lies beneath the ocean floor and has a thickness of five to twelve kilometers. On the upper surface, there is a thin layer of unconsolidated sediment that rests on the basement layer composed of basalt. 洋殼位于海洋底板之下,其厚度在5至12公里之間,其表面為薄薄的一層未固結的沉積物,沉積物覆蓋于由玄武巖組成的基底巖層之上。
- The formation of the amphibolite and amphibolitization gabbro occurred in the Kuerti ophiolite are related to the shere zone slightly oblique to the third layer gabbro in the low oceanic crust. 庫爾提蛇綠巖內角閃巖和角閃巖化輝長(cháng)巖的形成與洋殼下部第三層輝長(cháng)巖的低角度剪切過(guò)程密切相關(guān)。
- The author deems that the geotectonic background of synvolcanic stage was the continental crust upliftsing and following riftings,and was not oceanic crust and its subdution-collision. 對同火山作用期的構造背景進(jìn)行了重點(diǎn)探討,認為它是大陸型地殼隆升及其后的裂陷環(huán)境,而不是大洋型地殼及其俯沖-碰撞環(huán)境。
- In subduction zones, where older and colder oceanic crust descends beneath another tectonic plate, Deep focus earthquakes may occur at much greater depths (up to seven hundred kilometers). 在隱沒(méi)帶,當更古老更冰冷的洋底殼下降到另一版塊之下時(shí),深層震源地震可能會(huì )發(fā)生在很深的地方(達到為七百千米)。