Abstract

Geological data and about 300 precision geochronological and geochemical determinations are analyzed to identify the Albian–Cenomanian continental-margin orogenic belt and simultaneous igneous province of Pacific Asia. The orogenic belt represents a newly formed region of continental lithosphere that resulted from the deformation of mainly Jurassic–Early Cretaceous epioceanic terranes. The igneous province is made up of volcanic and intrusive complexes of mostly Albian age, which are syn-orogenic within the belt and post-orogenic beyond it. The igneous rocks include A-, I-, and S-type granitoids; adakites; and VAB- and OIB-type basalts and their intrusive analogues. Both the orogenic belt and the igneous province were formed in a tectonic setting of a transform continental margin between 110 and 95 Ma. The interval of 103–97 Ma became the peak of orogenic and magmatic activity caused by upwelling of the hot asthenospheric mantle through destructed stagnant slabs of the pre-Albian subduction. The Albian–Cenomanian age of the large gold, copper, tungsten, tin, and other ore deposits argues in favor of recognition of the corresponding metallogenic province. The first age data (100–97 Ma) are reported for the granite from the Malmyzh deposit within the Sikhote-Alin Ridge.

中文翻译：

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阿尔比亚－西诺曼尼亚造山带和太平洋火成岩省

摘要

分析了地质数据和约300项精确的地质年代和地球化学测定结果，以识别阿尔比亚－西诺曼尼亚大陆边缘造山带和同时为火成岩的亚太省。造山带代表了陆相岩石圈的一个新形成的区域，该区域是由侏罗纪至早白垩世表生海层地壳变形形成的。火成岩省由大部分为阿尔比亚时代的火山岩和侵入岩组成，它们在该带内是同造山运动的，而在其后则是造山运动的。火成岩包括A型，I型和S型花岗岩。阿达克人 以及VAB和OIB型玄武岩及其侵入性类似物。造山带和火成岩省均形成于构造大陆背景下的变质大陆边缘，介于110至95 Ma之间。103-97 Ma的间隔成为造山运动和岩浆活动的高峰，这是由于热的软流圈地幔通过破坏前的阿尔比俯冲板块而上升而引起的。大型金，铜，钨，锡和其他矿床的阿尔比诺-西诺曼尼亚时代主张承认相应的成矿省。据报道，Sikhote-Alin Ridge内Malmyzh矿床的花岗岩的首次年龄数据（100-97 Ma）。