气候变化领域集成服务门户(CCPortal): Gravimetric analysis of the rifts and volcanic fields of the Jalisco block, Mexico

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DOI	10.1016/j.tecto.2020.228577
	Gravimetric analysis of the rifts and volcanic fields of the Jalisco block, Mexico
	Camacho M.; Alvarez R.
发表日期	2020
ISSN	00401951
卷号	791
英文摘要	The gravity map of the complete Jalisco Block (JB) is obtained from satellite-derived measurements at a resolution of ~1 km separation, including the offshore region up to the Middle America Trench (MAT). Tepic-Zacoalco (TZ) and Colima delimiting rifts of the JB are identified as gravimetric minima. The NW limit of the block appears also as a rifted zone, with a gravity minimum connecting Bahia de Banderas with the TZ rift, defining a new triple point: the Compostela Triple Point (rift-rift-rift) that together with the Guadalajara Triple Point determine the north boundary of the Jalisco Block. The largest negative gravity anomalies are observed associated with the Central Jalisco Volcanic Lineament (CJVL) and Bahía de Banderas; they appear to be connected since they are only separated by a small positive anomaly east of Bahía de Banderas. The CJVL is parallel to the Middle America Trench, exhibiting a discontinuous alignment of Quaternary volcanism from the Colima Volcanic Complex to the northwestern rifted limit of the Jalisco Block. Ameca and Santiago rivers flow parallel to each other in a northwesterly direction for 100 km, then Santiago river changes course to continue 64 km in a north-northwesterly direction up to Aguamilpa dam. Ameca river should follow the same direction; instead, it abruptly changes its course to a southwesterly direction to discharge in Bahía de Banderas. The drastic course deviation is attributed to the intersection of Ameca river causeway with the Bahía de Banderas-Compostela rift, proposed in this study to be the northwestern limit of the Jalisco Block. © 2020
关键词	Bahía de Banderas Bouguer anomalies Colima rift EIGEN-6C4 satellite data Guadalajara Triple Point Jalisco Block
英文关键词	Bridges; Offshore oil well production; Parallel flow; Rivers; Volcanoes; Course deviations; Gravity anomalies; Me-xico; Middle America trenches; Quaternary volcanisms; Triple points; Volcanic complex; Volcanic field; Gravimetric analysis; gravity anomaly; plate motion; plate tectonics; rift zone; spatial resolution; tectonic evolution; tectonic setting; triple junction; Jalisco Block; Mexico [North America]; Ameca
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207724
作者单位	Posgrado en Ciencias de la Tierra, Ciudad Universitaria, Universidad Nacional Autónoma de Mexico, Mexico City, 04510, Mexico; Instituto de Investigaciones en Matemáticas Aplicadas y en Sistemas (IIMAS), Universidad Nacional Autónoma de Mexico, Mexico City, 04510, Mexico
推荐引用方式 GB/T 7714	Camacho M.,Alvarez R.. Gravimetric analysis of the rifts and volcanic fields of the Jalisco block, Mexico[J],2020,791.
APA	Camacho M.,&Alvarez R..(2020).Gravimetric analysis of the rifts and volcanic fields of the Jalisco block, Mexico.Tectonophysics,791.
MLA	Camacho M.,et al."Gravimetric analysis of the rifts and volcanic fields of the Jalisco block, Mexico".Tectonophysics 791(2020).