DOI: 10.1016/j.tecto.2020.228577
论文题名: Gravimetric analysis of the rifts and volcanic fields of the Jalisco block, Mexico
作者: Camacho M. ; Alvarez R.
刊名: Tectonophysics
ISSN: 00401951
出版年: 2020
卷: 791 语种: 英语
中文关键词: 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
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 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170558
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
Camacho M.,Alvarez R.. Gravimetric analysis of the rifts and volcanic fields of the Jalisco block, Mexico[J]. Tectonophysics,2020-01-01,791