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손영관,조형래,우주선,김영환,최문영 한국해양과학기술원 2017 Ocean and Polar Research Vol.39 No.2
The Lago Sofia conglomerate in southern Chile is a deep-marine gravelly deposit, which is hundreds of meters thick and kilometers wide and extends laterally for more than 100 km, filling the foredeep trough of the Cretaceous Magallanes Basin. For understanding the depositional processes and environments of this gigantic deep-sea conglomerate, detailed analyses on sedimentary facies, architecture and paleoflow patterns were carried out, highlighting the differences between the northern (Lago Pehoe and Lago Goic areas) and southern (Lago Sofia area) parts of the study area. The conglomerate bodies in the northern part occur as relatively thin (< 100 m thick), multiple units intervened by thick mudstone-dominated sequences. They show paleoflows toward ENE and S to SW, displaying a converging drainage pattern. In the southern part, the conglomerate bodies are vertically interconnected and form a thick (> 400 m thick) conglomerate sequence with rare intervening fine-grained deposits. Paleoflows are toward SW. The north-to-south variations are also distinct in sedimentary facies. The conglomerate bodies in the southern part are mainly composed of clast-supported conglomerate with sandy matrix, which is interpreted to be deposited from highly concentrated bedload layers under turbidity currents. Those in the northern part are dominated by matrix- to clast-supported conglomerate with muddy matrix, which is interpreted as the products of composite mass flows comprising a turbidity current, a gravelly hyperconcentrated flow and a mud-rich debris flow. All these characteristics suggest that the Lago Sofia conglomerate was formed in centripetally converging submarine channels, not in centrifugally diverging channels of submarine fans. The tributaries in the north were dominated by mass flows, probably affected by channel-bank failures or basin-marginal slope instability processes. In contrast, the trunk channel in the south was mostly filled by tractive processes, which resulted in the vertical and lateral accretion of gravel bars, deposition of gravel dunes and filling of scours and channels, similar to deposits of terrestrial gravel-bed rivers. The trunk channel developed along the axis of foredeep trough and its confinement within the trough is probably responsible for the thick, interconnected channel fills. The large-scale architecture of the trunk-channel fills shows an eastward offset stacking pattern, suggesting that the channel migrated eastwards most likely due to the uplift of the Andean Cordillera.
손영관,Ki Hwa Park 한국지질과학협의회 2004 Geosciences Journal Vol.8 No.1
Jeju Island comprises extensive lava flows and hun-dreds of monogenetic volcanic cones with rare and thin sedimen-tary deposits. However, a number of boreholes reveal that thelavas are only 50 to 120 m thick along the coastal regions and arewhich is correlative with the Seoguipo Formation. Detailed exam-ination of the subsurface Seoguipo Formation, as recovered fromthe Sagye borehole in the southwestern part of the island, revealsthat the formation consists of primary hydrovolcanic facies (mas-sive or inclined stratified lapilli tuff) emplaced by Surtseyan falloutsand debris flows in subaerial or subaqueous settings and reworkedhydrovolcanic facies (stratified, massive, or normally graded peb-ble conglomerate and sandstone) and nonvolcanic facies (homo-geneous or laminated mudstone) that were deposited in subaerialto submarine (nearshore to offshore) settings. The predominanceof volcaniclastic deposits in the formation demonstrates that theearly stage of Jeju volcanism was characterized by repetitivehydrovolcanic activity probably because of an abundance of exter-nal water for hydroexplosion. The Seoguipo Formation is envis-aged to consist of multiple, superposed hydromagmatic volcanoeswith intervening, marine or nonmarine sedimentary sequences.This finding warrants redefinition of the Seoguipo Formation as asedimentary succession, above the U Formation, composed of fos-sil-barren and fossiliferous, subaerial and subaqueous, volcaniclas-forming lavas.
손영관,Sohn, James 한국광학기기산업협회 2009 光學世界 Vol.123 No.-
본 고에서는 최근 세계적인 경기침체 및 글로벌 자동차 산업의 지각변동의 파고에서 살아남기 위해 온갖 힘을 쏟고 있는 글로벌 완성차 및 부품사들 사이에서 이슈화 되고 있는 지능형 자동차용 광학계의 개발 동향에 대하여 기술하고자 한다.