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   威尔逊构造旋回 的翻译结果: 查询用时:0.221秒
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威尔逊构造旋回
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This paper aims to make an approach for the relation between the formation and distribution of gold deposits and plate tectonism in China.

本文指出,中国岩金矿床的形成和分布严格地受板块构造控制。(1)裂谷带和俯冲、碰撞带等不同构造环境金的成矿特征明显不同。俯冲带金矿床还具有水平分带性,它受富金变质基底和深断裂的影响而复杂化;(2)不同构造环境金的成矿作用,既有区别,又有联系,在威尔逊构造旋回中为一连续过程,在成矿作用、矿床类型、矿质来源、矿石金属元素组合等方面均具有旋回性;(3)吕梁期和燕山期是我国最重要的金成矿期,是分别伴随太古代绿岩-裂谷带封闭和大规模俯冲、碰撞作用而发生的。在太古代绿岩带之上叠加有燕山期俯冲构造的地区,是我国最重要的金成矿集中区。

The Qinling orogen is a continental orogenic belt sandwiched between the North China block and Yangtze block in the central China continent and a Caledonian to Indosinian collisional orogen. There exist divergent views about the pre-Caledonia evolution of the orogen though quite a number of data are available. This paper mainly introduces a series of tectono-thermal event from 1.25 to 0.84 Ga, such as the opening of a continental rift in the late Mesoproterozoic (1243±46 Ma), the formation of the Songshugou...

The Qinling orogen is a continental orogenic belt sandwiched between the North China block and Yangtze block in the central China continent and a Caledonian to Indosinian collisional orogen. There exist divergent views about the pre-Caledonia evolution of the orogen though quite a number of data are available. This paper mainly introduces a series of tectono-thermal event from 1.25 to 0.84 Ga, such as the opening of a continental rift in the late Mesoproterozoic (1243±46 Ma), the formation of the Songshugou ocean basin in the late Mesoproterozoic (1084±73 to 1030±46 Ma), and the intrusion of syn-orogenic granites in the early Neoproterozoic (960 to 840 Ma), which illustrates that the margin of the Yangtze continent underwent a Wilson tectonic cycle in the pre-Caledonian period. This suggests that there exist geological records of a Meso- and Neoproterozoic orogen in the study area. However, this orogeny did not take place during the convergence between the North China block and Yangtze block but during the convergence between the North Qinling metamorphic terrane that once had belonged to the northern margin of the Yangtze block and the Yangtze block to its south.

秦岭造山带是位于中国大陆中部并夹持于华北与扬子陆块之间的大陆造山带,是加里东期至印支期的碰撞造山带。对前加里东期演化虽然亦积累了不少资料,但认识上存在较大分歧。本文着重介绍秦岭造山带自中元古代晚期武关裂谷的打开(1243Ma±46Ma),中元古代末期松树沟洋盆的形成(1084Ma±73Ma~1030Ma±46Ma)以及新元古代早期同造山期花岗岩的侵入(960~840Ma)等自1.25Ga至0.84Ga期间的一系列热-构造事件,反映扬子大陆边缘前加里东期曾经历过一次“威尔逊构造旋回”,表明该区存在中—新元古代造山带的地质记录。但这次造山作用不是华北与扬子大陆的汇聚,而是曾属于扬子大陆边缘的“北秦岭变质地体”与其南的扬子大陆的一次汇聚过程。

 
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