Inside the Ryoke Magmatic Arc: Crustal Deformation, High-T T Metamorphism, and Magmatic Pulses

被引：4

作者：

Okudaira, Takamoto ^{[1
]}

Kawakami, Tetsuo ^{[2
]}

Ikeda, Takeshi ^{[3
]}

Skrzypek, Etienne ^{[4
]}

机构：

[1] Osaka Metropolitan Univ, Dept Geosci, Osaka 5588585, Japan

[2] Kyoto Univ, Dept Geol & Mineral, Kyoto 6068502, Japan

[3] Kyushu Univ, Dept Earth & Planetary Sci, Fukuoka 8190395, Japan

[4] Karl Franzens Univ Graz, Inst Earth Sci, A-8010 Graz, Austria

来源：

ELEMENTS | 2024年 / 20卷 / 02期

基金：

日本学术振兴会;

关键词：

active margin; low-pressure/high-temperature metamorphism; Cretaceous magmatic pulses; plutono-metamorphic complex; accessory mineral petrochronology; SOUTHWEST JAPAN; SW JAPAN; YANAI DISTRICT; FIELD GRADIENT; AOYAMA AREA; BELT; CONSTRAINTS; ROCKS; GRANITOIDS; BEHAVIOR;

D O I：

10.2138/gselements.20.2.96

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

T he Ryoke belt represents the root of a volcanic arc exposed across SW Japan. It records successive deformation phases, high-temperature metamorphism, and several magmatic pulses that occurred during the Late Cretaceous. Successive magma intrusions at different crustal levels raised the overall geothermal gradient of the arc crust, and their thermal influence was contrastingly recorded in metamorphic zircon and monazite. Despite a broadly similar duration of magmatic activity (20-30 My) along the belt, the timing and periodicity of magma pulses varied. An along-arc variation in lower crustal magma generation together with a fluctuating crustal stress regime likely controlled the formation and evolution of this magmatic arc section.

引用

页码：96 / 102

页数：7

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