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首页> 外文会议>Siam Physics Congress >Crustal density structure across Thailand delineated from 2D density modelling using gravity data and receiver function
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Crustal density structure across Thailand delineated from 2D density modelling using gravity data and receiver function

机译：泰国与2D密度建模的地壳密度结构采用重力数据和接收器功能划算

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This work aims to gather geological and geophysical evidences to construct the crustal density model of Thailand. The initial density models beneath 14-, 16- and 17-degree latitude were delineated from receiver function (RF) data and global crustal density model. The crustal density models were then updated to fit the Bouguer gravity anomaly data (BA) provided by the Royal Thai Survey Department using a 2-D gravity modelling software. The upward continuation technique was also applied to BA for enhancing the deep structure by omitting the influence of shallow structures. The derived crustal density models agree with Thailand's tectonic setting. The density of the upper crust increases from 2.60 to 2.64 g/cm~3 from west to east, from Sibumasu to Khorat Plateau - Indochina terrane. Between these two main terranes, the obtained model reveals the back-arc island, Sukhothai arc and Inthanon Zone, with a density of 2.55 g/cm~3. The higher density of the lower crust with the derived mantle boundary from RF, ranging from 30.8 km of Sibumasu in the western to 38 km in the Khorat Plateau - Indochina terrane in the east, fit well with the filtered BA. Low BA that appear in Khorat plateau is not associated with topography in area which correspond to the high-density structure above upper mantle which need further investigation. Although, the developed crustal density models agree with BA, RF and tectonic evolution of Thailand, the additional gravity survey is suggested to enhance the crustal density models along the selected profiles.
机译：这项工作旨在收集地质和地球物理证据，构建泰国的地壳密度模型。 14-，16-和17度纬度下的初始密度模型从接收器函数（RF）数据和全球地壳密度模型中描绘。然后更新了地壳密度模型，以适应泰国皇家调查部门提供的Bouguer重力异常数据（BA）使用2-D重力建模软件。向上延续技术也应用于BA，用于通过省略浅结构的影响来增强深结构。衍生的地壳密度模型与泰国的构造环境一致。上层地壳的密度从西向东的2.60到2.64克/厘米〜3增加，来自Sibumasu到Khorat Plateau - Indochina Terrane。在这两个主要地铁之间，所获得的模型揭示了后弧岛，Sukhothai弧和Inthanon区，密度为2.55克/厘米〜3。来自RF的衍生地幔边界的下壳的较高密度，从西部西武鲁的30.8千米的西伯拉特高原 - 吲哚普利 - 吲哚替纳地区的辛巴马湖，与过滤的BA合适。在Khorat Plateau中出现的低BA与面积的地形无关，该地块对应于需要进一步调查的上部地幔上方的高密度结构。虽然，发达的地壳密度模型与泰国的BA，RF和构造演进同意，但建议额外的重力调查沿着所选轮廓增强地壳密度模型。

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