Structure of the Northern Altar Pull-Apart Basin Revealed by a 2D Reflection Seismic Survey: Evolution of the Gulf of California Shear Zone in Northwest Mexico

Structure of the Northern Altar Pull-Apart Basin Revealed by a 2D Reflection Seismic Survey: Evolution of the Gulf of California Shear Zone in Northwest Mexico
复制标题

二维反射地震勘测揭示的北坛拉分盆地的结构:墨西哥西北部加利福尼亚湾剪切带的演化

DOI:
10.1007/s00024-022-03138-1
复制
发表时间:
2022
影响因子:
2
通讯作者:
Stock, Joann M.
Stock, Joann M.
中科院分区:
地球科学3区
文献类型:
--
作者:
Huerta, Jorge Antonio;González-Escobar, Mario;Stock, Joann M.

文献摘要

参考文献

相似文献

加利福尼亚湾北部和索尔顿海槽发育晚中新世-上新世早期斜裂陷体系演化过程中遗弃的分段边缘盆地。在墨西哥索诺拉西北部的Altar盆地,有一个bb50 km厚的沉积记录,代表了加利福尼亚湾海侵(晚中新世)的第一次海侵(晚中新世),随后是科罗拉多河的第一次三角洲沉积。通过对二维反射地震线进行处理和解释,表征了Altar盆地北部太平洋-北美板块边界的张拉构造地层特征。断裂控制着三角洲沉积的沉降和聚集)。结果表明,东北方向的声波基底逐渐变浅,新的nw向断层,以及三个主要的地震反射面,定义了三个单元的基底:A(最老),B和C(最年轻)。通过层序地层和动物群的相似性,我们将A单元与house组(亚利桑那州西南部和加利福尼亚州东南部)联系起来,表明它存在于墨西哥西北部。祭坛断裂走向~ N45°W,并与Dunas断裂(加州东南部)走向一致,表明这两条断裂是同一连续构造。C层以上的地震层受断层影响较小。相比之下,层位A、B和C被断层切割,倾角更大,横向不连续。我们认为祭坛盆地的沉积发生在上新世晚期的弃井之后。祭坛盆地主要张拉活动的停止与张拉板块边界变形的区域性西移同时发生,保存了墨西哥西北部加利福尼亚湾剪切带演化的记录。
The northern Gulf of California and Salton Trough contain segmented marginal basins abandoned during the oblique rift system’s evolution during Late Miocene-Early Pliocene. The Altar basin, in northwestern Sonora, Mexico, contains a > 5 km-thick sedimentary record representing the first marine incursion (Late Miocene) of the Gulf of California seaway followed by the first deltaic deposits of the Colorado River. 2D reflection seismic lines were processed and interpreted to characterize tectonostratigraphic features of the transtensional Pacific-North America plate boundary in the northern Altar basin (deep structure, faults controlling the subsidence and accumulation of deltaic deposits). The results show the acoustic basement becoming increasingly shallow toward the northeast, new NW-trending faults, and three major seismic reflectors defining the base of three units: A (oldest), B, and C (youngest). Through similarities in sequence stratigraphy and fauna, we correlate Unit A with the Bouse Formation (SW Arizona and SE California), implying its presence in northwest Mexico. The Altar fault strikes ~ N45°W and aligns with the Dunas fault (SE California), suggesting that these faults are the same continuous structure. Seismic horizons above horizon C are less affected by faults. In contrast, horizons A, B and C are cut by faults, have steeper dips, and are laterally discontinuous. We propose the deposition of unfaulted strata occurred after the latest Pliocene abandonment of the Altar basin. Cessation of major transtensional activity in the Altar basin is coincident with a regional westward shift of transtensional plate boundary deformation, preserving a record of the evolving Gulf of California shear zone in northwest Mexico.
墨西哥加利福尼亚湾北部延伸区向西迁移
DOI: --
发表时间: 2007
期刊:
影响因子: --
作者:
Manuel Aragón;A. Martín‐Barajas
通讯作者: A. Martín‐Barajas
来自加利福尼亚湾的新近纪链毛属 (Brönnimann 和 Resig, 1971)
DOI: --
发表时间: 2017
期刊:
影响因子: --
作者:
A. Y. Miranda;A. Carreño;K. McDougall
通讯作者: K. McDougall
科罗拉多河下游上新世主要加积作用的河流演化和构造影响:布尔海德冲积层
DOI: --
发表时间: 2015
期刊:
影响因子: --
作者:
K. Howard;P. House;R. Dorsey;P. Pearthree
通讯作者: P. Pearthree
DOI: --
发表时间: 1989
期刊:
影响因子: --
作者:
J. Nourse
通讯作者: J. Nourse
太平洋-北美板块运动和墨西哥加利福尼亚湾北部上德尔芬盆地的开口
DOI: 10.1130/b25154.1
发表时间: 2003
影响因子: 4.9
作者:
M. Oskin;J. Stock
通讯作者: J. Stock