Alternate senses of displacement along the Tsushima fault system during the Neogene based on fracture analyses near the western margin of the Japan Sea

Reconstruction of Subduction and Back‐Arc Spreading in the NW Pacific and Aleutian Basin: Clues to Causes of Cretaceous and Eocene Plate Reorganizations

“…Our new model shows that a reconstruction of the Japan Sea opening that is consistent with crustal thicknesses and paleomagnetic data does not require large‐scale dextral along the strike‐slip faults bounding the Japan Sea. In contrast, our model predicts a phase of sinistral transpression in southwesternmost Honshu and the Tsushima and Goto islands from ~17 to 15 Ma, consistent with observed Middle Miocene deformation along the Tsushima‐Goto fault system (Fabbri et al, ; Son et al, ).…”

Revised Fission-track Ages and Chronostratigraphies of the Miocene Basin-fill Volcanics and Basements, SE Korea

“…연일층군 퇴적암의 생층서 연대는 전기 마이오세 말부터 중기 마이오세로 정의 된다 (Kim and Yoon, 1978;Kim, 1990;Yi and Yun, 1992). 한반도 동남부의 마이오세 분지들 내에서 일어난 격렬한 칼크-알칼리 화산활동은 후기 올리고세에 태 평양판의 섭입재개와 더불어 활동성 연변부로 바뀐 것과 밀접하게 관계되었음을 암시하며, 화산활동 절 정기(전기 마이오세)는 동해의 배호확장 시작을 유발 한 판 섭입의 가속화와 판 교차점의 동향 이동과 밀 접하게 관련되었을 것으로 해석되었다 (Clague and Jarrad, 1973;Charvet and Fabbri, 1987;Lee and Pouclet, 1988;Fabbri et al, 1996). 장기분지와 어 일분지에 산출되는 현무암과 현무암질안산암의 지화 학 자료는 비알칼리암(sub-alkaline) 계열의 중-칼륨 (medium-K)의 칼크-알칼리계열에 해당함을 지시한다 (Park et al, 1999;Shim et al, 2011).…”

Evolution of the Miocene Waup Basin, SE Korea, in response to dextral shear along the southwestern margin of the East Sea (Sea of Japan)

“…One of the important findings of these studies is that the Yonil Tectonic Line (YTL; Fig. 1b) is the major fault system that controlled the Miocene crustal deformation and basin formation in SE Korea (Son et al, 1997(Son et al, , 2002Kim et al, 1998) as opposed to previous interpretations that the Yangsan and Ulsan faults were responsible for the formation of the Tertiary basins (Han et al, 1987;Hwang et al, 1995;Yoon and Chough, 1995;Fabbri et al, 1996;Lee et al, 1999b;Chough et al, 2000).…”

“…This indirect approach is valid for reconstructing the stress field along major faults (Hancock and Barka, 1981;Fabbri et al, 1996). In the case of fault-slip data obtained from the striated fault planes (HA1, HA2, GR1, WS1, WS2, WS3, WT1, WT2, WT3 in Fig.…”

“…One major model, known as the bar-door model, invokes a trenchward (southward) retreat of the Japanese Arc relative to the Korean Peninsula associated with rotation and bending of the arc Matsuda, 1983, 1987;Otofuji et al, 1985Otofuji et al, , 1991Otofuji et al, , 1994Hayashida et al, 1991). Another model, known as the pull-apart model, emphasizes the role of regional strike-slip faults along the eastern and western margins of the sea (Otsuki and Ehiro, 1978;Lallemand andJolivet, 1985/1986;Kimura and Tamaki, 1986;Jolivet et al, 1991Jolivet et al, , 1994Jolivet et al, , 1995Jolivet and Tamaki, 1992;Fournier and Jolivet, 1995;Fabbri et al, 1996). In order to resolve the controversies and develop more elaborate models regarding the opening of the East Sea, diverse geologic data both from the seafloor and from the surrounding landmasses should be analyzed and synthesized.…”